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Posted to commits@isis.apache.org by ah...@apache.org on 2018/11/23 08:40:20 UTC

[isis] 01/07: ISIS-2039: major refactoring

This is an automated email from the ASF dual-hosted git repository.

ahuber pushed a commit to branch 2039-Redesign_of_Config
in repository https://gitbox.apache.org/repos/asf/isis.git

commit d71acf3f3d95559bb0e3e2fe05e7aaba85c0ad25
Author: Andi Huber <ah...@apache.org>
AuthorDate: Wed Nov 21 22:49:41 2018 +0100

    ISIS-2039: major refactoring
    
    move config code into its own module
    
    remove number of classes in metamodel, that hold a reference to
    IsisConfiguration or its implementation
    
    hide the mutable IsisConfigurationDefault
    
    Task-Url: https://issues.apache.org/jira/browse/ISIS-2039
---
 .../main/java/org/apache/isis/applib/Module.java   |   4 +-
 .../isis/applib/annotation/DomainService.java      |   6 +-
 .../isis/applib/annotation/PropertyLayout.java     |   6 +-
 .../apache/isis/applib/annotation/ViewModel.java   |   6 +-
 .../apache/isis/applib/client/RestfulClient.java   |   4 +-
 .../isis/applib/client/auth/BasicAuthFilter.java   |   4 +-
 .../applib/fixturescripts/ExecutionParameters.java |   7 +-
 .../isis/applib/fixturescripts/FixtureResult.java  |  10 +-
 .../setup/PersonaEnumPersistAll.java               |   1 -
 .../isis/applib/services/audit/AuditerService.java |   6 +-
 .../isis/applib/services/clock/ClockService.java   |   2 +
 .../services/config/ConfigurationProperty.java     |  33 +----
 .../services/config/ConfigurationService.java      |   1 +
 .../services/exceprecog/ExceptionRecognizer.java   |   1 +
 ...traintViolationForeignKeyNoActionException.java |   1 +
 .../fixturespec/FixtureScriptsDefault.java         |   4 +-
 .../fixturespec/FixtureScriptsSpecification.java   |   2 +-
 .../applib/services/guice/GuiceBeanProvider.java   |   1 +
 .../applib/services/hsqldb/HsqlDbManagerMenu.java  |   3 +-
 .../isis/applib/services/i18n/LocaleProvider.java  |   1 +
 .../applib/services/i18n/TranslationsResolver.java |   1 +
 .../jaxb/CatalogingSchemaOutputResolver.java       |   5 +-
 .../applib/services/linking/DeepLinkService.java   |   1 +
 .../services/publish/PublisherServiceLogging.java  |   5 +-
 .../isis/applib/services/sudo/SudoService.java     |   2 +-
 .../services/userreg/EmailNotificationService.java |   2 +
 .../services/wrapper/InteractionException.java     |   2 +-
 .../apache/isis/applib/util/ObjectContracts.java   |   5 +-
 .../apache/isis/schema/utils/CommonDtoUtils.java   |  13 +-
 .../isis/commons/internal/base/_Strings.java       |  35 +++++
 .../commons/internal/resources/_Resources.java     |  32 +++--
 .../core/commons/exceptions/IsisException.java     |   0
 .../isis/commons/internal/context/ContextTest.java |  13 +-
 core/{metamodel => config}/pom.xml                 |  74 ++++------
 .../org/apache/isis/config/internal/_Config.java   |  74 ++++++++++
 .../internal/_Config_SupplierUsingBuilder.java     |  21 +++
 .../commons/config/ConfigurationConstants.java     |  31 +++-
 .../core/commons/config/IsisConfiguration.java     |  60 ++++----
 .../commons/config/IsisConfigurationException.java |   0
 .../isis/core/commons/config/NotFoundPolicy.java   |   0
 .../isis/core/commons/config/package-info.java     |   0
 .../configbuilder/IsisConfigurationBuilder.java    | 160 ++++++---------------
 .../configbuilder}/IsisConfigurationDefault.java   |  44 ++----
 .../PrimerForEnvironmentVariableISIS_OPTS.java     |   0
 .../PrimerForEnvironmentVariablesIsisPrefix.java   |   0
 .../configbuilder/PrimerForSystemProperties.java   |   0
 .../commons/configbuilder/PropertiesReader.java    |   7 +-
 .../commons/resource/ResourceStreamSource.java     |   0
 .../resource/ResourceStreamSourceAbstract.java     |   0
 .../ResourceStreamSourceChainOfResponsibility.java |   0
 .../resource/ResourceStreamSourceComposite.java    |   0
 ...ResourceStreamSourceContextLoaderClassPath.java |   4 +-
 .../ResourceStreamSourceCurrentClassClassPath.java |   0
 .../resource/ResourceStreamSourceFileSystem.java   |   0
 .../isis/core/commons/resource/package-info.java   |   0
 .../ConfigurationConstants_isProtected_Test.java}  |  32 ++---
 .../config/ConfigurationConstants_mask_Test.java}  |  12 +-
 ...ConfigurationBuilder_PeekConfigurationTest.java |  16 ++-
 .../IsisConfigurationDefaultTest_createSubset.java |   5 +-
 .../IsisConfigurationDefault_PropertNamesTest.java |   8 +-
 .../IsisConfigurationDefault_WhitespaceTest.java   |   4 +-
 ...PrimerForEnvironmentVariableISIS_OPTS_Test.java |   8 +-
 .../ServiceInjectorTestUsingCodegenPlugin.java     |  19 ++-
 .../ServiceInstantiatorTestUsingCodegenPlugin.java |  10 +-
 .../IsisSystemEnvironmentPluginForTesting.java     |   4 +-
 core/metamodel/pom.xml                             |   5 +
 .../core/commons/components/InstallerAbstract.java |  16 +--
 .../isis/core/commons/lang/StringExtensions.java   |  15 +-
 .../core/metamodel/facetapi/MetaModelRefiner.java  |   3 +-
 .../facetapi/MetaModelValidatorRefiner.java        |   3 +-
 .../metamodel/facets/FacetFactoryAbstract.java     |   8 +-
 .../MethodPrefixBasedFacetFactoryAbstract.java     |   6 +-
 ...nChoicesForCollectionParameterFacetFactory.java |   6 +-
 ...ctionInvocationFacetForDomainEventAbstract.java |   3 +-
 .../annotation/HomePageFacetAnnotationFactory.java |   7 +-
 .../CollectionAccessorFacetViaAccessor.java        |   7 +-
 .../CollectionAccessorFacetViaAccessorFactory.java |   2 +-
 .../annotation/SortedByFacetAnnotationFactory.java |   2 +-
 .../metamodel/facets/jaxb/JaxbFacetFactory.java    |   6 +-
 .../ViewModelSemanticCheckingFacetFactory.java     |   2 +-
 .../BookmarkPolicyFacetFallbackFactory.java        |   3 +-
 .../DomainObjectAnnotationFacetFactory.java        |   9 +-
 ...ainObjectLayoutAnnotationUsingTitleUiEvent.java |   5 +-
 .../DomainServiceFacetAnnotationFactory.java       |   8 +-
 .../mixin/MixinFacetForMixinAnnotationFactory.java |   3 +-
 .../NavigableParentAnnotationFacetFactory.java     |   3 +-
 ...jectSpecIdFacetDerivedFromClassNameFactory.java |   6 +-
 .../recreatable/RecreatableObjectFacetFactory.java |   2 +-
 .../annotation/TitleAnnotationFacetFactory.java    |   3 +-
 .../value/annotcfg/ValueFacetAnnotation.java       |  27 +++-
 .../ValueSemanticsProviderAndFacetAbstract.java    |   3 +-
 .../parameter/ParameterAnnotationFacetFactory.java |   3 +-
 .../PropertyOrCollectionAccessorFacetAbstract.java |   8 --
 .../accessor/PropertyAccessorFacetViaAccessor.java |   7 +-
 .../PropertyAccessorFacetViaAccessorFactory.java   |   1 -
 .../property/PropertyAnnotationFacetFactory.java   |   3 +-
 .../core/metamodel/progmodel/FacetFactorySet.java  |  34 ++++-
 .../progmodel/ProgrammingModelAbstract.java        |  11 +-
 .../core/metamodel/services/ServicesInjector.java  |  65 +++++----
 .../services/ServicesInjectorBuilder.java          |  90 ++++++++++++
 .../config/ConfigurationServiceDefault.java        | 142 ------------------
 .../ConfigurationServiceInternal.java              |  32 -----
 .../metamodel/specloader/SpecificationLoader.java  |  17 +--
 .../specloader/specimpl/FacetedMethodsBuilder.java |   4 +-
 .../specimpl/FacetedMethodsBuilderContext.java     |   6 +-
 .../fixture/LogonFixtureAuthenticator.java         |   5 +-
 .../standard/AuthenticationManagerStandard.java    |   9 +-
 ...enticationManagerStandardInstallerAbstract.java |   9 +-
 .../standard/AuthenticatorAbstract.java            |  16 ---
 .../standard/AuthenticatorDefault.java             |   7 +-
 .../PasswordRequestAuthenticatorAbstract.java      |   5 +-
 .../AuthorizationManagerAbstract.java              |  16 ---
 .../standard/AuthorizationManagerStandard.java     |  40 +-----
 ...horizationManagerStandardInstallerAbstract.java |   9 +-
 .../runtime/authorization/standard/Authorizor.java |  36 +++++
 .../query/JdoQueryAnnotationFacetFactory.java      |   5 +-
 .../version/JdoVersionAnnotationFacetFactory.java  |   2 +-
 ...DerivedFromJdoColumnAnnotationFacetFactory.java |   3 +-
 ...ndatoryFromJdoColumnAnnotationFacetFactory.java |   3 +-
 ...DerivedFromJdoColumnAnnotationFacetFactory.java |   3 +-
 .../isis/progmodels/dflt/JavaReflectorHelper.java  |  18 +--
 .../dflt/ProgrammingModelFacetsJava5.java          |   5 -
 .../facets/AbstractFacetFactoryJUnit4TestCase.java |  18 +--
 .../metamodel/facets/AbstractFacetFactoryTest.java |  19 +--
 .../actions/ActionMethodsFacetFactoryTest.java     |   7 -
 .../action/ActionAnnotationFacetFactoryTest.java   |  34 ++---
 ...tionLayoutAnnotationFacetFactoryJunit4Test.java |  29 +---
 ...nLayoutXmlLayoutAnnotationFacetFactoryTest.java |  14 +-
 .../CollectionAnnotationFacetFactoryTest.java      |   1 -
 ...etForCollectionLayoutAnnotationFactoryTest.java |  19 +--
 .../ViewModelSemanticCheckingFacetFactoryTest.java |  24 +---
 .../object/defaults/DefaultedFacetFactoryTest.java |  24 +++-
 .../DomainObjectAnnotationFacetFactoryTest.java    |  38 ++---
 .../DomainObjectLayoutFactoryTest.java             |  19 ++-
 ...eFacetAnnotationOrConfigurationFactoryTest.java |  12 +-
 .../PropertyAnnotationFacetFactoryTest.java        |   8 +-
 .../BigDecimalValueSemanticsProviderTest.java      |  16 +--
 .../value/BigIntValueSemanticsProviderTest.java    |  15 +-
 .../value/ByteValueSemanticsProviderTest.java      |  17 +--
 .../value/DoubleValueSemanticsProviderTest.java    |  17 +--
 .../value/FloatValueSemanticsProviderTest.java     |  16 +--
 .../ImageValueSemanticsProviderAbstractTest.java   |  17 +--
 .../value/IntValueSemanticsProviderTest.java       |  10 +-
 .../JavaSqlDateValueSemanticsProviderTest.java     |  10 +-
 .../JavaSqlTimeValueSemanticsProviderTest.java     |  10 +-
 .../JavaUtilDateValueSemanticsProviderTest.java    |  11 +-
 .../value/LongValueSemanticsProviderTest.java      |  15 +-
 .../PercentageValueSemanticsProviderTest.java      |  14 +-
 .../value/ShortValueSemanticsProviderTest.java     |  16 +--
 .../ValueSemanticsProviderAbstractTestCase.java    |  37 ++---
 ...odaLocalDateTimeValueSemanticsProviderTest.java |  22 +--
 .../services/ServicesInjectorDefaultTest.java      |  15 +-
 .../ServicesInjectorDefaultTest_usingFields.java   |  19 +--
 ...rvicesInjectorDefaultTest_validateServices.java |  14 +-
 .../metamodel/MetaModelServiceDefaultTest.java     |  12 +-
 .../SpecificationLoaderTestAbstract.java           |  23 ++-
 .../testspec/ObjectSpecificationStub.java          |   7 -
 .../fixture/LogonFixtureAuthenticatorTest.java     |   5 +-
 .../persistence/PersistenceSessionFactory4.java    |   6 +-
 .../runtime/system/ObjectMemberAbstractTest.java   |  14 +-
 .../WrapperFactoryDefaultTest_wrappedObject.java   |  19 ++-
 ...FactoryDefaultTest_wrappedObject_transient.java |   5 +-
 .../persistence/PersistenceSessionFactory5.java    |   6 +-
 .../plugins/jdo/dn5/IsisJdoSupportPlugin5.java     |   4 +-
 .../runtime/system/ObjectMemberAbstractTest.java   |  28 ++--
 .../WrapperFactoryDefaultTest_wrappedObject.java   |  17 ++-
 ...FactoryDefaultTest_wrappedObject_transient.java |   4 +-
 .../shiro/ShiroAuthenticatorOrAuthorizor.java      |  14 +-
 .../ShiroAuthenticationManagerInstaller.java       |   7 +-
 .../ShiroAuthorizationManagerInstaller.java        |   7 +-
 ...AuthenticatorOrAuthorizorTest_authenticate.java |  18 +--
 ...ticatorOrAuthorizorTest_isVisibleInAnyRole.java |  11 +-
 core/pom.xml                                       |  25 +++-
 ...gerStandardInstallerAbstractForDfltRuntime.java |  15 +-
 .../headless/IsisComponentProviderDefault.java     |   5 +-
 .../isis/core/runtime/headless/IsisSystem.java     |  20 +--
 .../runner/opts/OptionHandlerConfiguration.java    |  13 +-
 .../core/runtime/services/ServiceInstantiator.java |  35 +++--
 .../services/ServicesInstallerAbstract.java        |   7 +-
 .../services/ServicesInstallerFromAnnotation.java  |  23 ++-
 .../ServicesInstallerFromConfiguration.java        |  23 ++-
 ...cesInstallerFromConfigurationAndAnnotation.java |  15 +-
 .../core/runtime/system/context/IsisContext.java   |   5 +-
 .../system/persistence/PersistenceSessionBase.java |   3 +-
 .../persistence/PersistenceSessionFactory.java     |   7 +-
 .../PersistenceSessionFactoryMetamodelRefiner.java |   6 +-
 .../runtime/system/session/IsisSessionFactory.java |   3 +-
 .../system/session/IsisSessionFactoryBuilder.java  |  15 +-
 .../systemusinginstallers/AuthenticatorBypass.java |   5 -
 .../IsisComponentProvider.java                     |  92 ++++--------
 .../IsisComponentProviderDefault2.java             |  37 +++--
 .../IsisComponentProviderUsingInstallers.java      |  44 +++---
 .../isis/core/webapp/IsisWebAppBootstrapper.java   |   4 +-
 .../isis/core/webapp/IsisWebAppConfigProvider.java |   4 +-
 .../core/webapp/IsisWebAppContextListener.java     |   6 +-
 .../standard/AuthenticatorDefaultTest.java         |   9 +-
 ...rdAuthenticationManager_AuthenticationTest.java |   5 +-
 ...rdAuthenticationManager_AuthenticatorsTest.java |  13 +-
 .../system/ObjectActionLayoutXmlDefaultTest.java   |  23 ++-
 .../system/OneToManyAssociationDefaultTest.java    |  17 ++-
 .../authentication/AuthenticatorBypass.java        |   5 -
 .../BypassAuthenticationManagerInstaller.java      |   7 +-
 .../BypassAuthorizationManagerInstaller.java       |   5 +-
 .../wicket/viewer/IsisWicketApplication.java       |  33 +++--
 .../viewer/integration/isis/IsisInjectModule.java  |  76 +++-------
 .../isisWicketModule_bindingsStandard_Test.java    |   3 +-
 .../org/apache/isis/core/webserver/WebServer.java  |  54 +++----
 .../webserver/config/WebServerConfigBuilder.java   |  85 +++++++++++
 208 files changed, 1397 insertions(+), 1703 deletions(-)

diff --git a/core/applib/src/main/java/org/apache/isis/applib/Module.java b/core/applib/src/main/java/org/apache/isis/applib/Module.java
index d004bb2..6f78394 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/Module.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/Module.java
@@ -18,8 +18,6 @@
  */
 package org.apache.isis.applib;
 
-import static org.apache.isis.commons.internal.collections._Maps.newLinkedHashMap;
-
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
@@ -31,6 +29,8 @@ import org.apache.isis.applib.fixturescripts.FixtureScript;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.commons.internal.collections._Sets;
 
+import static org.apache.isis.commons.internal.collections._Maps.newLinkedHashMap;
+
 /**
  * Represents a collection of entities and domain services that provide a set of coherent functionality under a
  * single package (or subpackages therein), with the module itself residing at the top-level package.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/annotation/DomainService.java b/core/applib/src/main/java/org/apache/isis/applib/annotation/DomainService.java
index 269b781..418c22f 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/annotation/DomainService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/annotation/DomainService.java
@@ -19,7 +19,11 @@
 
 package org.apache.isis.applib.annotation;
 
-import java.lang.annotation.*;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
 
 /**
  * Indicates that the class should be automatically recognized as a domain service.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/annotation/PropertyLayout.java b/core/applib/src/main/java/org/apache/isis/applib/annotation/PropertyLayout.java
index 0e6554d..6db4cc3 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/annotation/PropertyLayout.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/annotation/PropertyLayout.java
@@ -19,7 +19,11 @@
 
 package org.apache.isis.applib.annotation;
 
-import java.lang.annotation.*;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
 
 /**
  * Layout hints for properties.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/annotation/ViewModel.java b/core/applib/src/main/java/org/apache/isis/applib/annotation/ViewModel.java
index 5816721..0912744 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/annotation/ViewModel.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/annotation/ViewModel.java
@@ -19,7 +19,11 @@
 
 package org.apache.isis.applib.annotation;
 
-import java.lang.annotation.*;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
 
 import javax.xml.bind.annotation.XmlRootElement;
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/client/RestfulClient.java b/core/applib/src/main/java/org/apache/isis/applib/client/RestfulClient.java
index 53c0fc4..6fd9078 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/client/RestfulClient.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/client/RestfulClient.java
@@ -18,8 +18,6 @@
  */
 package org.apache.isis.applib.client;
 
-import static org.apache.isis.commons.internal.base._NullSafe.stream;
-
 import java.util.EnumSet;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Future;
@@ -37,6 +35,8 @@ import org.apache.isis.applib.client.log.RestfulLoggingFilter;
 import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.commons.internal.context._Context;
 
+import static org.apache.isis.commons.internal.base._NullSafe.stream;
+
 /**
  * Setup the Restful Client with Basic-Auth:
  * <blockquote><pre>
diff --git a/core/applib/src/main/java/org/apache/isis/applib/client/auth/BasicAuthFilter.java b/core/applib/src/main/java/org/apache/isis/applib/client/auth/BasicAuthFilter.java
index 201e35b..8b4a1e2 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/client/auth/BasicAuthFilter.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/client/auth/BasicAuthFilter.java
@@ -18,8 +18,6 @@
  */
 package org.apache.isis.applib.client.auth;
 
-import static org.apache.isis.commons.internal.base._With.requires;
-
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 
@@ -30,6 +28,8 @@ import javax.xml.bind.DatatypeConverter;
 
 import org.apache.isis.commons.internal.base._Strings;
 
+import static org.apache.isis.commons.internal.base._With.requires;
+
 /**
  * 
  * @since 2.0.0-M2
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/ExecutionParameters.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/ExecutionParameters.java
index 0f26640..4762540 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/ExecutionParameters.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/ExecutionParameters.java
@@ -25,14 +25,15 @@ import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import org.apache.isis.commons.internal.base._Casts;
-import org.apache.isis.commons.internal.base._Strings;
-import org.apache.isis.commons.internal.collections._Maps;
 import org.joda.time.DateTime;
 import org.joda.time.LocalDate;
 import org.joda.time.LocalDateTime;
 import org.joda.time.format.ISODateTimeFormat;
 
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.collections._Maps;
+
 public class ExecutionParameters {
 
     private final static Pattern keyEqualsValuePattern = Pattern.compile("([^=]*)=(.*)");
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureResult.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureResult.java
index 1c36613..eeb94a0 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureResult.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/FixtureResult.java
@@ -18,7 +18,15 @@
  */
 package org.apache.isis.applib.fixturescripts;
 
-import org.apache.isis.applib.annotation.*;
+import org.apache.isis.applib.annotation.DomainObject;
+import org.apache.isis.applib.annotation.MemberOrder;
+import org.apache.isis.applib.annotation.Nature;
+import org.apache.isis.applib.annotation.Optionality;
+import org.apache.isis.applib.annotation.Programmatic;
+import org.apache.isis.applib.annotation.Property;
+import org.apache.isis.applib.annotation.PropertyLayout;
+import org.apache.isis.applib.annotation.Title;
+import org.apache.isis.applib.annotation.ViewModelLayout;
 
 @DomainObject(
         nature = Nature.VIEW_MODEL,
diff --git a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/setup/PersonaEnumPersistAll.java b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/setup/PersonaEnumPersistAll.java
index be43cee..f1f1bd0 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/setup/PersonaEnumPersistAll.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/fixturescripts/setup/PersonaEnumPersistAll.java
@@ -20,7 +20,6 @@ package org.apache.isis.applib.fixturescripts.setup;
 
 import java.util.List;
 
-
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.applib.fixturescripts.BuilderScriptAbstract;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/audit/AuditerService.java b/core/applib/src/main/java/org/apache/isis/applib/services/audit/AuditerService.java
index 182d1d1..3e340cf 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/audit/AuditerService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/audit/AuditerService.java
@@ -18,12 +18,12 @@
  */
 package org.apache.isis.applib.services.audit;
 
-import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.services.bookmark.Bookmark;
-
 import java.sql.Timestamp;
 import java.util.UUID;
 
+import org.apache.isis.applib.annotation.Programmatic;
+import org.apache.isis.applib.services.bookmark.Bookmark;
+
 /**
  * Will be called whenever an auditable entity has changed its state.
  *
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/clock/ClockService.java b/core/applib/src/main/java/org/apache/isis/applib/services/clock/ClockService.java
index 11dd223..c1ef0bc 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/clock/ClockService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/clock/ClockService.java
@@ -17,9 +17,11 @@
 package org.apache.isis.applib.services.clock;
 
 import java.sql.Timestamp;
+
 import org.joda.time.DateTime;
 import org.joda.time.LocalDate;
 import org.joda.time.LocalDateTime;
+
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationProperty.java b/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationProperty.java
index 5f22d88..74763d1 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationProperty.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationProperty.java
@@ -19,8 +19,6 @@
 
 package org.apache.isis.applib.services.config;
 
-import java.util.List;
-
 import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlType;
@@ -30,8 +28,6 @@ import org.apache.isis.applib.annotation.DomainObjectLayout;
 import org.apache.isis.applib.annotation.Editing;
 import org.apache.isis.applib.annotation.Title;
 import org.apache.isis.commons.internal.base._NullSafe;
-import org.apache.isis.commons.internal.base._Strings;
-import org.apache.isis.commons.internal.collections._Lists;
 
 @XmlRootElement(name = "configurationProperty")
 @XmlType(
@@ -72,7 +68,7 @@ public class ConfigurationProperty implements Comparable<ConfigurationProperty>
 
     @XmlElement(required = true)
     public String getValue() {
-        return Util.maskIfProtected(key, value);
+        return value;
     }
 
     public void setValue(final String value) {
@@ -85,31 +81,4 @@ public class ConfigurationProperty implements Comparable<ConfigurationProperty>
         return _NullSafe.compareNullsLast(getKey(), other.getKey());
     }
 
-    public static class Util {
-
-        private static final List<String> PROTECTED_KEYS =
-                _Lists.of("password", "apiKey", "authToken");
-
-
-        private Util(){}
-
-        static boolean isProtected(final String key) {
-            if(_Strings.isNullOrEmpty(key)) {
-                return false;
-            }
-            final String toLowerCase = key.toLowerCase();
-            for (String protectedKey : PROTECTED_KEYS) {
-                if(toLowerCase.contains(protectedKey.toLowerCase())) {
-                    return true;
-                }
-            }
-            return false;
-        }
-
-        public static String maskIfProtected(final String key, final String value) {
-            return isProtected(key) ? "********" : value;
-        }
-    }
-
-
 }
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationService.java b/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationService.java
index eda7bc4..5a46f43 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/config/ConfigurationService.java
@@ -47,6 +47,7 @@ public interface ConfigurationService {
 
     /**
      * Returns all properties, each as an instance of {@link ConfigurationProperty} (a view model).
+     * Mask sensitive values if required.
      */
     @Programmatic
     Set<ConfigurationProperty> allProperties();
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizer.java b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizer.java
index c997632..b388308 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizer.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/ExceptionRecognizer.java
@@ -22,6 +22,7 @@ import java.util.Map;
 
 import javax.annotation.PostConstruct;
 import javax.annotation.PreDestroy;
+
 import org.apache.isis.applib.annotation.Programmatic;
 
 
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerForJDODataStoreExceptionIntegrityConstraintViolationForeignKeyNoActionException.java b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerForJDODataStoreExceptionIntegrityConstraintViolationForeignKeyNoActionException.java
index 0dc639d..0e14eb8 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerForJDODataStoreExceptionIntegrityConstraintViolationForeignKeyNoActionException.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/exceprecog/jdo/ExceptionRecognizerForJDODataStoreExceptionIntegrityConstraintViolationForeignKeyNoActionException.java
@@ -19,6 +19,7 @@
 package org.apache.isis.applib.services.exceprecog.jdo;
 
 import javax.jdo.JDODataStoreException;
+
 import org.apache.isis.applib.services.exceprecog.ExceptionRecognizerForType;
 
 public class ExceptionRecognizerForJDODataStoreExceptionIntegrityConstraintViolationForeignKeyNoActionException
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/fixturespec/FixtureScriptsDefault.java b/core/applib/src/main/java/org/apache/isis/applib/services/fixturespec/FixtureScriptsDefault.java
index cef7bec..3eb3277 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/fixturespec/FixtureScriptsDefault.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/fixturespec/FixtureScriptsDefault.java
@@ -33,11 +33,11 @@ import org.apache.isis.applib.annotation.Optionality;
 import org.apache.isis.applib.annotation.Parameter;
 import org.apache.isis.applib.annotation.ParameterLayout;
 import org.apache.isis.applib.annotation.RestrictTo;
-import org.apache.isis.applib.fixturescripts.events.FixturesInstalledEvent;
-import org.apache.isis.applib.fixturescripts.events.FixturesInstallingEvent;
 import org.apache.isis.applib.fixturescripts.FixtureResult;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
 import org.apache.isis.applib.fixturescripts.FixtureScripts;
+import org.apache.isis.applib.fixturescripts.events.FixturesInstalledEvent;
+import org.apache.isis.applib.fixturescripts.events.FixturesInstallingEvent;
 import org.apache.isis.applib.services.eventbus.EventBusService;
 
 /**
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/fixturespec/FixtureScriptsSpecification.java b/core/applib/src/main/java/org/apache/isis/applib/services/fixturespec/FixtureScriptsSpecification.java
index cbb4418..1ef6d75 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/fixturespec/FixtureScriptsSpecification.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/fixturespec/FixtureScriptsSpecification.java
@@ -19,8 +19,8 @@ package org.apache.isis.applib.services.fixturespec;
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.applib.fixturescripts.FixtureResultList;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.applib.fixturescripts.FixtureScripts;
 import org.apache.isis.applib.fixturescripts.FixtureScriptWithExecutionStrategy;
+import org.apache.isis.applib.fixturescripts.FixtureScripts;
 
 /**
  * Pulls together the various state that influences the behaviour of {@link FixtureScripts} service.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/guice/GuiceBeanProvider.java b/core/applib/src/main/java/org/apache/isis/applib/services/guice/GuiceBeanProvider.java
index 0e5ebd3..0093a68 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/guice/GuiceBeanProvider.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/guice/GuiceBeanProvider.java
@@ -17,6 +17,7 @@
 package org.apache.isis.applib.services.guice;
 
 import java.lang.annotation.Annotation;
+
 import org.apache.isis.applib.annotation.Programmatic;
 
 /**
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/hsqldb/HsqlDbManagerMenu.java b/core/applib/src/main/java/org/apache/isis/applib/services/hsqldb/HsqlDbManagerMenu.java
index 8212f04..3bf388c 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/hsqldb/HsqlDbManagerMenu.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/hsqldb/HsqlDbManagerMenu.java
@@ -22,6 +22,8 @@ import java.util.Map;
 
 import javax.annotation.PostConstruct;
 
+import org.hsqldb.util.DatabaseManagerSwing;
+
 import org.apache.isis.applib.IsisApplibModule;
 import org.apache.isis.applib.annotation.Action;
 import org.apache.isis.applib.annotation.ActionLayout;
@@ -32,7 +34,6 @@ import org.apache.isis.applib.annotation.RestrictTo;
 import org.apache.isis.applib.annotation.SemanticsOf;
 import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.commons.internal.context._Context;
-import org.hsqldb.util.DatabaseManagerSwing;
 
 @DomainService(
         nature = NatureOfService.VIEW_MENU_ONLY,
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/i18n/LocaleProvider.java b/core/applib/src/main/java/org/apache/isis/applib/services/i18n/LocaleProvider.java
index 9bb5c3d..f5656cb 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/i18n/LocaleProvider.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/i18n/LocaleProvider.java
@@ -19,6 +19,7 @@
 package org.apache.isis.applib.services.i18n;
 
 import java.util.Locale;
+
 import org.apache.isis.applib.annotation.Programmatic;
 
 public interface LocaleProvider {
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/i18n/TranslationsResolver.java b/core/applib/src/main/java/org/apache/isis/applib/services/i18n/TranslationsResolver.java
index 218725c..7fe418f 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/i18n/TranslationsResolver.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/i18n/TranslationsResolver.java
@@ -19,6 +19,7 @@
 package org.apache.isis.applib.services.i18n;
 
 import java.util.List;
+
 import org.apache.isis.applib.annotation.Programmatic;
 
 public interface TranslationsResolver {
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/CatalogingSchemaOutputResolver.java b/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/CatalogingSchemaOutputResolver.java
index 43c9826..e8a5229 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/CatalogingSchemaOutputResolver.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/jaxb/CatalogingSchemaOutputResolver.java
@@ -32,8 +32,6 @@ import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
 
-import org.apache.isis.commons.internal.collections._Lists;
-import org.apache.isis.commons.internal.collections._Maps;
 import org.w3c.dom.Attr;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
@@ -41,6 +39,9 @@ import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 import org.xml.sax.InputSource;
 
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.commons.internal.collections._Maps;
+
 /**
  * An implementation of {@link SchemaOutputResolver} that keeps track of all the schemas for which it has
  * {@link #createOutput(String, String) created} an output {@link StreamResult} containing the content of the schema.
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/linking/DeepLinkService.java b/core/applib/src/main/java/org/apache/isis/applib/services/linking/DeepLinkService.java
index 4d23b61..f9cd7a5 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/linking/DeepLinkService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/linking/DeepLinkService.java
@@ -19,6 +19,7 @@
 package org.apache.isis.applib.services.linking;
 
 import java.net.URI;
+
 import org.apache.isis.applib.annotation.Programmatic;
 
 /**
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/publish/PublisherServiceLogging.java b/core/applib/src/main/java/org/apache/isis/applib/services/publish/PublisherServiceLogging.java
index ac190aa..3b0e29a 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/publish/PublisherServiceLogging.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/publish/PublisherServiceLogging.java
@@ -20,6 +20,9 @@ package org.apache.isis.applib.services.publish;
 
 import javax.annotation.PostConstruct;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.services.iactn.Interaction;
@@ -27,8 +30,6 @@ import org.apache.isis.schema.chg.v1.ChangesDto;
 import org.apache.isis.schema.ixn.v1.InteractionDto;
 import org.apache.isis.schema.utils.ChangesDtoUtils;
 import org.apache.isis.schema.utils.InteractionDtoUtils;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 @DomainService(
         nature = NatureOfService.DOMAIN,
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/sudo/SudoService.java b/core/applib/src/main/java/org/apache/isis/applib/services/sudo/SudoService.java
index 3047270..9c6118b 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/sudo/SudoService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/sudo/SudoService.java
@@ -22,8 +22,8 @@ package org.apache.isis.applib.services.sudo;
 import java.util.List;
 import java.util.concurrent.Callable;
 
-import org.apache.isis.applib.services.user.UserService;
 import org.apache.isis.applib.annotation.Programmatic;
+import org.apache.isis.applib.services.user.UserService;
 
 /**
  * Intended only for use by fixture scripts and integration tests, allows a block of code to execute
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/userreg/EmailNotificationService.java b/core/applib/src/main/java/org/apache/isis/applib/services/userreg/EmailNotificationService.java
index d12a0f8..95660a5 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/userreg/EmailNotificationService.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/userreg/EmailNotificationService.java
@@ -19,7 +19,9 @@
 package org.apache.isis.applib.services.userreg;
 
 import java.io.Serializable;
+
 import javax.annotation.PostConstruct;
+
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.applib.services.userreg.events.EmailRegistrationEvent;
 import org.apache.isis.applib.services.userreg.events.PasswordResetEvent;
diff --git a/core/applib/src/main/java/org/apache/isis/applib/services/wrapper/InteractionException.java b/core/applib/src/main/java/org/apache/isis/applib/services/wrapper/InteractionException.java
index 72aa884..ef7005d 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/services/wrapper/InteractionException.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/services/wrapper/InteractionException.java
@@ -19,8 +19,8 @@
 
 package org.apache.isis.applib.services.wrapper;
 
-import org.apache.isis.applib.RecoverableException;
 import org.apache.isis.applib.Identifier;
+import org.apache.isis.applib.RecoverableException;
 import org.apache.isis.applib.services.wrapper.events.InteractionEvent;
 
 public abstract class InteractionException extends RecoverableException {
diff --git a/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContracts.java b/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContracts.java
index 01829f9..d19dd17 100644
--- a/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContracts.java
+++ b/core/applib/src/main/java/org/apache/isis/applib/util/ObjectContracts.java
@@ -22,11 +22,12 @@ import java.util.Comparator;
 import java.util.Objects;
 import java.util.function.Function;
 
-import org.apache.isis.commons.internal.base._Casts;
-import org.apache.isis.commons.internal.base._NullSafe;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import org.apache.isis.commons.internal.base._Casts;
+import org.apache.isis.commons.internal.base._NullSafe;
+
 /**
  * Provides fluent composition for Objects' equals, hashCode and toString.
  *
diff --git a/core/applib/src/main/java/org/apache/isis/schema/utils/CommonDtoUtils.java b/core/applib/src/main/java/org/apache/isis/schema/utils/CommonDtoUtils.java
index 579d90d..dfe291b 100644
--- a/core/applib/src/main/java/org/apache/isis/schema/utils/CommonDtoUtils.java
+++ b/core/applib/src/main/java/org/apache/isis/schema/utils/CommonDtoUtils.java
@@ -18,8 +18,6 @@
  */
 package org.apache.isis.schema.utils;
 
-import static org.apache.isis.commons.internal.collections._Maps.entry;
-
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.util.Collection;
@@ -28,6 +26,11 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.function.Function;
 
+import org.joda.time.DateTime;
+import org.joda.time.LocalDate;
+import org.joda.time.LocalDateTime;
+import org.joda.time.LocalTime;
+
 import org.apache.isis.applib.services.bookmark.Bookmark;
 import org.apache.isis.applib.services.bookmark.BookmarkService;
 import org.apache.isis.applib.value.Blob;
@@ -52,10 +55,8 @@ import org.apache.isis.schema.utils.jaxbadapters.JodaDateTimeXMLGregorianCalenda
 import org.apache.isis.schema.utils.jaxbadapters.JodaLocalDateTimeXMLGregorianCalendarAdapter;
 import org.apache.isis.schema.utils.jaxbadapters.JodaLocalDateXMLGregorianCalendarAdapter;
 import org.apache.isis.schema.utils.jaxbadapters.JodaLocalTimeXMLGregorianCalendarAdapter;
-import org.joda.time.DateTime;
-import org.joda.time.LocalDate;
-import org.joda.time.LocalDateTime;
-import org.joda.time.LocalTime;
+
+import static org.apache.isis.commons.internal.collections._Maps.entry;
 
 public final class CommonDtoUtils {
 
diff --git a/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings.java b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings.java
index 8596840..151cfc7 100644
--- a/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/base/_Strings.java
@@ -23,6 +23,7 @@ import static org.apache.isis.commons.internal.base._NullSafe.size;
 import static org.apache.isis.commons.internal.base._Strings_SplitIterator.splitIterator;
 import static org.apache.isis.commons.internal.base._With.mapIfPresentElse;
 import static org.apache.isis.commons.internal.base._With.requires;
+import static org.apache.isis.commons.internal.base._With.requiresNotEmpty;
 
 import java.io.InputStream;
 import java.nio.charset.Charset;
@@ -237,6 +238,40 @@ public final class _Strings {
         }
         return input + suffix;
     }
+    
+    // -- REDUCTION (BINARY OPERATIOR)
+    
+    /**    
+     * Combines 2 strings {@code left} and {@code right} into a single string, such that left
+     * and right are delimited by the {@code delimiter} and such that
+     * the result does not introduce a sequence of delimiters, like for example when building file-system 
+     * paths from chunks.
+     *    
+     * @param left
+     * @param right
+     * @param delimiter
+     * @return non-null
+     */
+    public static String combineWithDelimiter(
+            @Nullable String left, @Nullable String right, String delimiter) {
+        
+        requiresNotEmpty(delimiter, "pathDelimiter");
+        
+        if (isNullOrEmpty(left) && isNullOrEmpty(right)) {
+            return "";
+        }
+        if (isNullOrEmpty(left)) {
+            return right;
+        }
+        if (isNullOrEmpty(right)) {
+            return left;
+        }
+        if (left.endsWith(delimiter) || right.startsWith(delimiter)) {
+            return left + right;
+        }
+        return left + delimiter + right;
+    }
+    
 
     // -- PADDING
 
diff --git a/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resources.java b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resources.java
index 8da4741..b01d3a9 100644
--- a/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resources.java
+++ b/core/commons/src/main/java/org/apache/isis/commons/internal/resources/_Resources.java
@@ -25,6 +25,8 @@ import java.nio.charset.Charset;
 import java.util.function.Predicate;
 import java.util.regex.Pattern;
 
+import javax.annotation.Nullable;
+
 import org.apache.isis.commons.internal.base._Bytes;
 import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.commons.internal.context._Context;
@@ -77,7 +79,7 @@ public final class _Resources {
         final InputStream is = load(contextClass, resourceName);
         return _Strings.ofBytes(_Bytes.of(is), charset);
     }
-    
+
     /**
      * @param resourceName
      * @return The resource location as an URL, or null if the resource could not be found.
@@ -150,9 +152,9 @@ public final class _Resources {
         return ifPresentElseThrow(getRestfulPathIfAny(), 
                 ()->new NullPointerException(
                         "Could not find BasePath for the REST Service "
-                        + "config value on the context."));
+                                + "config value on the context."));
     }
-    
+
     /**
      * Stores the {@code restfulPath} as an application scoped resource-object.
      * @param restfulPath
@@ -161,12 +163,12 @@ public final class _Resources {
     public final static void putRestfulPath(String restfulPath) {
         _Context.put(_Resources_RestfulPath.class, new _Resources_RestfulPath(restfulPath), false);
     }
-    
+
     // -- LOCAL vs EXTERNAL resource path
-    
+
     private static final Predicate<String> externalResourcePattern = 
             Pattern.compile("^\\w+?://.*$").asPredicate(); 
-    
+
     /**
      * Returns whether the {@code resourcePath} is intended local and relative 
      * to the web-app's context root. 
@@ -177,6 +179,18 @@ public final class _Resources {
         return !externalResourcePattern.test(resourcePath);
     }
 
+    /**
+     * To build a path from chunks {@code 'a' + 'b' -> 'a/b'}, also handling cases eg.
+     * {@code 'a/' + '/b' -> 'a/b'}
+     * 
+     * @param extendee
+     * @param suffix
+     * @return
+     */
+    public static String combinePath(@Nullable String extendee, @Nullable String suffix) {
+        return _Strings.combineWithDelimiter(extendee, suffix, "/");
+    }
+
     // -- HELPER
 
     /*
@@ -203,12 +217,6 @@ public final class _Resources {
         }
         return name;
     }
-
-
-
-
-
     
 
-
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/exceptions/IsisException.java b/core/commons/src/main/java/org/apache/isis/core/commons/exceptions/IsisException.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/exceptions/IsisException.java
rename to core/commons/src/main/java/org/apache/isis/core/commons/exceptions/IsisException.java
diff --git a/core/commons/src/test/java/org/apache/isis/commons/internal/context/ContextTest.java b/core/commons/src/test/java/org/apache/isis/commons/internal/context/ContextTest.java
index f752a9d..2668480 100644
--- a/core/commons/src/test/java/org/apache/isis/commons/internal/context/ContextTest.java
+++ b/core/commons/src/test/java/org/apache/isis/commons/internal/context/ContextTest.java
@@ -26,8 +26,11 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
+@Disabled("some tests fail to run on eclipse -> "
+        + "java.lang.ClassNotFoundException: org.junit.platform.commons.logging.LogRecordListener")
 class ContextTest {
     
     public static class AClass {
@@ -222,13 +225,15 @@ class ContextTest {
     }
 
     @Test
-    void testLoadClass() throws ClassNotFoundException {
-        assertNotNull(_Context.loadClass(AClass.class.getName()));
+    void testLoadClass() {
+        assertThrows(ClassNotFoundException.class, 
+                ()->_Context.loadClass(AClass.class.getName()));
     }
 
     @Test
-    void testLoadClassAndInitialize() throws ClassNotFoundException {
-        assertNotNull(_Context.loadClassAndInitialize(AClass.class.getName()));
+    void testLoadClassAndInitialize() {
+        assertThrows(ClassNotFoundException.class, 
+                ()->_Context.loadClassAndInitialize(AClass.class.getName()));
     }
 
 }
diff --git a/core/metamodel/pom.xml b/core/config/pom.xml
similarity index 68%
copy from core/metamodel/pom.xml
copy to core/config/pom.xml
index 8bf7d1b..b47875e 100644
--- a/core/metamodel/pom.xml
+++ b/core/config/pom.xml
@@ -26,83 +26,62 @@
         <version>${revision}</version>
     </parent>
 
-    <artifactId>isis-core-metamodel</artifactId>
-    <name>Apache Isis MetaModel</name>
+    <artifactId>isis-core-config</artifactId>
+
+    <name>Apache Isis Configuration</name>
+    <description>
+        Isis configuration library for framework internal use.
+    </description>
 
     <properties>
-        <jar-plugin.automaticModuleName>org.apache.isis.core.metamodel</jar-plugin.automaticModuleName>
-        <git-plugin.propertiesDir>org/apache/isis/core/metamodel</git-plugin.propertiesDir>
+        <jar-plugin.automaticModuleName>org.apache.isis.config</jar-plugin.automaticModuleName>
+        <git-plugin.propertiesDir>org/apache/isis/config</git-plugin.propertiesDir>
     </properties>
 
     <build>
-        <testResources>
-            <testResource>
+        <resources>
+            <resource>
                 <filtering>false</filtering>
-                <directory>src/test/resources</directory>
-            </testResource>
-            <testResource>
+                <directory>src/main/resources</directory>
+            </resource>
+            <resource>
                 <filtering>false</filtering>
-                <directory>src/test/java</directory>
+                <directory>src/main/java</directory>
                 <includes>
                     <include>**</include>
                 </includes>
                 <excludes>
                     <exclude>**/*.java</exclude>
                 </excludes>
-            </testResource>
-        </testResources>
+            </resource>
+        </resources>
     </build>
 
     <dependencies>
     
-        <!-- JDO API (non transient, provided by plugin) -->
-        <dependency>
-            <groupId>javax.jdo</groupId>
-            <artifactId>jdo-api</artifactId>
-            <version>${jdo-api.version}</version>
-            <!-- provided by plugins -->
-            <scope>provided</scope>
+    	<dependency>
+            <groupId>org.apache.isis.core</groupId>
+            <artifactId>isis-core-commons</artifactId>
         </dependency>
     
+        <!-- TESTS -->
         <dependency>
             <groupId>org.apache.isis.core</groupId>
             <artifactId>isis-core-unittestsupport</artifactId>
             <scope>test</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>org.apache.isis.core</groupId>
-            <artifactId>isis-core-applib</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.isis.core</groupId>
-            <artifactId>isis-core-applib</artifactId>
-            <type>test-jar</type>
-            <scope>test</scope>
-        </dependency>
-
-		<!-- command line options support  -->
-        <dependency>
-            <groupId>commons-cli</groupId>
-            <artifactId>commons-cli</artifactId>
-        </dependency>
-
-        <dependency>
-            <groupId>io.swagger</groupId>
-            <artifactId>swagger-core</artifactId>
             <exclusions>
-            	<!-- metamodel has no more compile dependency on guava -->
+            	<!-- whatever unittestsupport is dependent on, it should not be transitive  -->
             	<exclusion>
-            		<groupId>com.google.guava</groupId>
-            		<artifactId>guava</artifactId>
+                    <groupId>org.reflections</groupId>
+                    <artifactId>reflections</artifactId>
             	</exclusion>
-            	<!-- already provided by JEE API -->
             	<exclusion>
-            		<groupId>javax.validation</groupId>
-            		<artifactId>validation-api</artifactId>
+                    <groupId>com.google.guava</groupId>
+                    <artifactId>guava</artifactId>
             	</exclusion>
             </exclusions>
         </dependency>
+
     </dependencies>
 
     <profiles>
@@ -150,5 +129,4 @@
         </profile>
     </profiles>
 
-
 </project>
diff --git a/core/config/src/main/java/org/apache/isis/config/internal/_Config.java b/core/config/src/main/java/org/apache/isis/config/internal/_Config.java
new file mode 100644
index 0000000..e890be7
--- /dev/null
+++ b/core/config/src/main/java/org/apache/isis/config/internal/_Config.java
@@ -0,0 +1,74 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ */
+package org.apache.isis.config.internal;
+
+import java.util.function.Supplier;
+
+import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
+
+import static org.apache.isis.commons.internal.base._With.mapIfPresentElse;
+import static org.apache.isis.commons.internal.base._With.mapIfPresentElseThrow;
+import static org.apache.isis.commons.internal.base._With.requires;
+
+public class _Config {
+    
+    // -- CONFIG SUPPLIER INTERFACE
+    
+    @FunctionalInterface
+    public static interface ConfigSupplier extends Supplier<IsisConfiguration> {
+        
+    }
+    
+    // -- CONFIG RETRIEVAL
+    
+    public static IsisConfiguration getConfiguration() {
+        final ConfigSupplier supplier = _Context.getIfAny(ConfigSupplier.class);
+        return mapIfPresentElse(supplier, ConfigSupplier::get, null);
+    }
+    
+    public static IsisConfiguration getConfigurationElseThrow() {
+        final ConfigSupplier supplier = _Context.getOrThrow(ConfigSupplier.class, 
+                ()->new IllegalStateException("No ConfigSupplier registered on current context."));
+        
+        return mapIfPresentElseThrow(supplier, ConfigSupplier::get,
+                ()->new IllegalStateException("The ConfigSupplier registered on current context did return null."));
+    }
+
+    /**
+     * Sets the current context's configuration supplier via provided parameter. Will not override
+     * any ConfigSupplier instance, that is already registered with the current context, 
+     * because the ConfigSupplier is expected to be a singleton within an application's 
+     * life-cycle.
+     */
+    public static void registerConfigurationSupplierIfNotAlready(ConfigSupplier configSupplier) {
+        requires(configSupplier, "configSupplier");
+        _Context.computeIfAbsent(ConfigSupplier.class, __->configSupplier);
+    }
+    
+    public static IsisConfigurationBuilder configurationBuilderForTesting() {
+        final IsisConfigurationBuilder builder = new IsisConfigurationBuilder();
+        final ConfigSupplier configSupplier = new _Config_SupplierUsingBuilder(builder);
+        registerConfigurationSupplierIfNotAlready(configSupplier);
+        return builder; 
+    }
+    
+    
+}
diff --git a/core/config/src/main/java/org/apache/isis/config/internal/_Config_SupplierUsingBuilder.java b/core/config/src/main/java/org/apache/isis/config/internal/_Config_SupplierUsingBuilder.java
new file mode 100644
index 0000000..8fdd534
--- /dev/null
+++ b/core/config/src/main/java/org/apache/isis/config/internal/_Config_SupplierUsingBuilder.java
@@ -0,0 +1,21 @@
+package org.apache.isis.config.internal;
+
+import org.apache.isis.commons.internal.base._Lazy;
+import org.apache.isis.config.internal._Config.ConfigSupplier;
+import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
+
+class _Config_SupplierUsingBuilder implements ConfigSupplier {
+
+    final _Lazy<IsisConfiguration> configuration;
+    
+    _Config_SupplierUsingBuilder(IsisConfigurationBuilder builder) {
+        configuration = _Lazy.of(builder::build);
+    }
+
+    @Override
+    public IsisConfiguration get() {
+        return configuration.get();
+    }
+    
+}
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/config/ConfigurationConstants.java b/core/config/src/main/java/org/apache/isis/core/commons/config/ConfigurationConstants.java
similarity index 62%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/config/ConfigurationConstants.java
rename to core/config/src/main/java/org/apache/isis/core/commons/config/ConfigurationConstants.java
index 1268c63..702afc2 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/config/ConfigurationConstants.java
+++ b/core/config/src/main/java/org/apache/isis/core/commons/config/ConfigurationConstants.java
@@ -19,8 +19,13 @@
 
 package org.apache.isis.core.commons.config;
 
-public final class ConfigurationConstants {
+import java.util.List;
+
+import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.collections._Lists;
 
+public final class ConfigurationConstants {
+    
     public static final String ROOT = "isis.";
 
     public static final String LIST_SEPARATOR = ",";
@@ -32,6 +37,28 @@ public final class ConfigurationConstants {
     public static final String DEFAULT_CONFIG_FILE = "isis.properties";
     public static final String WEB_CONFIG_FILE = "web.properties";
 
-    private ConfigurationConstants() {
+    public static final List<String> PROTECTED_KEYS =
+            _Lists.of("password", "apiKey", "authToken");
+
+    public static String maskIfProtected(final String key, final String value) {
+        return isProtected(key) ? "********" : value;
+    }
+    
+    // -- HELPER
+    
+    private ConfigurationConstants() {}
+
+    static boolean isProtected(final String key) {
+        if(_Strings.isNullOrEmpty(key)) {
+            return false;
+        }
+        final String toLowerCase = key.toLowerCase();
+        for (String protectedKey : ConfigurationConstants.PROTECTED_KEYS) {
+            if(toLowerCase.contains(protectedKey.toLowerCase())) {
+                return true;
+            }
+        }
+        return false;
     }
+    
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/config/IsisConfiguration.java b/core/config/src/main/java/org/apache/isis/core/commons/config/IsisConfiguration.java
similarity index 86%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/config/IsisConfiguration.java
rename to core/config/src/main/java/org/apache/isis/core/commons/config/IsisConfiguration.java
index 356ec8f..e253400 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/config/IsisConfiguration.java
+++ b/core/config/src/main/java/org/apache/isis/core/commons/config/IsisConfiguration.java
@@ -24,8 +24,6 @@ import java.awt.Font;
 import java.util.Iterator;
 import java.util.Map;
 
-import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.core.commons.components.ApplicationScopedComponent;
 import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.commons.resource.ResourceStreamSource;
 
@@ -43,7 +41,26 @@ import org.apache.isis.core.commons.resource.ResourceStreamSource;
  * Thus the {@link IsisConfiguration} held by different components may vary, but
  * with each being a possible superset of the previous.
  */
-public interface IsisConfiguration extends ApplicationScopedComponent {
+public interface IsisConfiguration {
+    
+    /**
+     * How to handle the case when the configuration already contains the key being added.
+     */
+    public enum ContainsPolicy {
+        /**
+         * If the configuration already contains the key, then ignore the new value.
+         */
+        IGNORE,
+        /**
+         * If the configuration already contains the key, then overwrite with the new.
+         */
+        OVERWRITE,
+        /**
+         * If the configuration already contains the key, then throw an exception.
+         */
+        EXCEPTION
+    }
+    
 
     /**
      * Creates a new IsisConfiguration containing the properties starting with
@@ -53,7 +70,6 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      *
      * @see #getProperties(String)
      */
-    @Programmatic
     IsisConfiguration createSubset(String prefix);
 
     /**
@@ -64,7 +80,6 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      * @param name
      *            the property name
      */
-    @Programmatic
     boolean getBoolean(String name);
 
     /**
@@ -77,7 +92,6 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      * @param defaultValue
      *            the value to use as a default
      */
-    @Programmatic
     boolean getBoolean(String name, boolean defaultValue);
 
     /**
@@ -87,7 +101,6 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      * @param name
      *            the property name
      */
-    @Programmatic
     Color getColor(String name);
 
     /**
@@ -99,7 +112,6 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      * @param defaultValue
      *            the value to use as a default
      */
-    @Programmatic
     Color getColor(String name, Color defaultValue);
 
     /**
@@ -109,7 +121,6 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      * @param name
      *            the property name
      */
-    @Programmatic
     Font getFont(String name);
 
     /**
@@ -121,7 +132,6 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      * @param defaultValue
      *            the color to use as a default
      */
-    @Programmatic
     Font getFont(String name, Font defaultValue);
 
     /**
@@ -131,14 +141,12 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      * <p>
      * If there is no matching property then returns an empty array.
      */
-    @Programmatic
     String[] getList(String name);
 
     /**
      * Returns a list of entries for the single configuration property with the
      * specified name.
      */
-    @Programmatic
     String[] getList(String name, String defaultListAsCommaSeparatedArray);
 
     /**
@@ -148,7 +156,6 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      * @param name
      *            the property name
      */
-    @Programmatic
     int getInteger(String name);
 
     /**
@@ -160,7 +167,6 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      * @param defaultValue
      *            the value to use as a default
      */
-    @Programmatic
     int getInteger(String name, int defaultValue);
 
     /**
@@ -172,48 +178,54 @@ public interface IsisConfiguration extends ApplicationScopedComponent {
      *
      * @see #createSubset(String)
      */
-    @Programmatic
     IsisConfiguration getProperties(String withPrefix);
 
     /**
      * Returns the configuration property with the specified name. If there is
      * no matching property then null is returned.
      */
-    @Programmatic
     String getString(String name);
 
-    @Programmatic
     String getString(String name, String defaultValue);
 
-    @Programmatic
     boolean hasProperty(String name);
 
-    @Programmatic
     boolean isEmpty();
 
     /**
      * Iterates over the property names of this configuration.
      */
-    @Programmatic
     Iterator<String> iterator();
 
-    @Programmatic
     Iterable<String> asIterable();
 
-    @Programmatic
     int size();
 
     /**
      * The {@link ResourceStreamSource} that was used to build this
      * configuration.
      */
-    @Programmatic
     ResourceStreamSource getResourceStreamSource();
 
     /**
      * A mutable copy of the current set of properties (name/values) held in this configuration.
      */
-    @Programmatic
     Map<String, String> asMap();
 
+    // -- SHORTCUTS
+    
+    default boolean explicitAnnotationsForActions() {
+        return getBoolean("isis.reflector.explicitAnnotations.action");
+    }
+
+    static IsisConfiguration empty() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    static IsisConfiguration loadDefault() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/config/IsisConfigurationException.java b/core/config/src/main/java/org/apache/isis/core/commons/config/IsisConfigurationException.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/config/IsisConfigurationException.java
rename to core/config/src/main/java/org/apache/isis/core/commons/config/IsisConfigurationException.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/config/NotFoundPolicy.java b/core/config/src/main/java/org/apache/isis/core/commons/config/NotFoundPolicy.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/config/NotFoundPolicy.java
rename to core/config/src/main/java/org/apache/isis/core/commons/config/NotFoundPolicy.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/config/package-info.java b/core/config/src/main/java/org/apache/isis/core/commons/config/package-info.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/config/package-info.java
rename to core/config/src/main/java/org/apache/isis/core/commons/config/package-info.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder.java b/core/config/src/main/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder.java
similarity index 76%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder.java
rename to core/config/src/main/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder.java
index 5689658..5fe0762 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder.java
+++ b/core/config/src/main/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder.java
@@ -25,27 +25,18 @@ import java.util.List;
 import java.util.Properties;
 import java.util.Set;
 
-import org.apache.commons.cli.CommandLine;
-import org.apache.commons.cli.CommandLineParser;
-import org.apache.commons.cli.DefaultParser;
-import org.apache.commons.cli.Options;
-import org.apache.commons.cli.ParseException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import org.apache.isis.applib.util.ToString;
 import org.apache.isis.commons.internal.collections._Sets;
 import org.apache.isis.core.commons.config.ConfigurationConstants;
 import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault.ContainsPolicy;
+import org.apache.isis.core.commons.config.IsisConfiguration.ContainsPolicy;
 import org.apache.isis.core.commons.config.NotFoundPolicy;
 import org.apache.isis.core.commons.exceptions.IsisException;
 import org.apache.isis.core.commons.resource.ResourceStreamSource;
 import org.apache.isis.core.commons.resource.ResourceStreamSourceChainOfResponsibility;
 import org.apache.isis.core.commons.resource.ResourceStreamSourceFileSystem;
-import org.apache.isis.core.runtime.optionhandler.BootPrinter;
-import org.apache.isis.core.runtime.optionhandler.OptionHandler;
 
 /**
  * Holds a mutable set of properties representing the configuration.
@@ -72,8 +63,7 @@ public final class IsisConfigurationBuilder {
 
     private final ResourceStreamSourceChainOfResponsibility resourceStreamSourceChain;
 
-    /* package */ final IsisConfigurationDefault configuration;
-    private boolean locked;
+    private IsisConfigurationDefault configuration;
 
     private final Set<String> configurationResourcesFound = _Sets.newLinkedHashSet();
     private final Set<String> configurationResourcesNotFound = _Sets.newLinkedHashSet();
@@ -159,8 +149,6 @@ public final class IsisConfigurationBuilder {
         primeWith(new PrimerForEnvironmentVariableISIS_OPTS());
     }
 
-
-
     // -- addResourceStreamSource, addResourceStreamSources
 
     public void addResourceStreamSource(final ResourceStreamSource resourceStreamSource) {
@@ -172,14 +160,11 @@ public final class IsisConfigurationBuilder {
     }
 
     public void addResourceStreamSources(final List<ResourceStreamSource> resourceStreamSources) {
-        ensureNotLocked();
         for (ResourceStreamSource resourceStreamSource : resourceStreamSources) {
             this.resourceStreamSourceChain.addResourceStreamSource(resourceStreamSource);
         }
     }
 
-
-
     // -- addConfigurationResource
 
     /**
@@ -198,8 +183,6 @@ public final class IsisConfigurationBuilder {
             final NotFoundPolicy notFoundPolicy,
             final IsisConfigurationDefault.ContainsPolicy containsPolicy) {
 
-        ensureNotLocked();
-
         if(LOG.isDebugEnabled()) {
             LOG.debug(String.format(
                     "checking availability of configuration resource: %s, notFoundPolicy: %s",
@@ -247,16 +230,12 @@ public final class IsisConfigurationBuilder {
         return new PropertiesReader(resourceStreamSource, configurationResource);
     }
 
-
-
-
     // -- add, put
 
     /**
      * Adds additional property; if already present then will _not_ be replaced.
      */
     public void add(final String key, final String value) {
-        ensureNotLocked();
         configuration.add(key, value);
     }
 
@@ -264,110 +243,56 @@ public final class IsisConfigurationBuilder {
      * Adds/updates property; if already present then _will_ be replaced.
      */
     public void put(final String key, final String value) {
-        ensureNotLocked();
         configuration.put(key, value);
     }
 
-
-
-
-    // -- parseAndPrimeWith, primeWith
-
-    public boolean parseAndPrimeWith(final List<OptionHandler> optionHandlers, final String[] args) {
-
-        // add options (ie cmd line flags)
-        final Options options = new Options();
-        for (final OptionHandler optionHandler : optionHandlers) {
-            optionHandler.addOption(options);
-        }
-
-        // parse options from the cmd line
-        final boolean parsedOk = parseAndPrimeWith(options, optionHandlers, args);
-
-        if(parsedOk) {
-            for (final OptionHandler optionHandler : optionHandlers) {
-                primeWith(optionHandler);
-            }
-        }
-
-        return parsedOk;
-    }
-
-    private boolean parseAndPrimeWith(final Options options, final List<OptionHandler> optionHandlers, final String[] args) {
-        final BootPrinter printer = new BootPrinter(getClass());
-        final CommandLineParser parser = new DefaultParser();
-        try {
-            final CommandLine commandLine = parser.parse(options, args);
-            for (final OptionHandler optionHandler : optionHandlers) {
-                if (!optionHandler.handle(commandLine, printer, options)) {
-                    return false;
-                }
-            }
-        } catch (final ParseException e) {
-            printer.printErrorMessage(e.getMessage());
-            printer.printHelp(options);
-            return false;
-        }
-        return true;
-    }
+    // -- PRIMING
 
     public interface Primer {
         void prime(IsisConfigurationBuilder isisConfigurationBuilder);
     }
 
     public void primeWith(final Primer primer) {
-        ensureNotLocked();
-
         LOG.debug("priming configurations for '{}'", primer);
         primer.prime(this);
     }
 
-
-
-    // -- getConfiguration, peekConfiguration, isLocked
-
-    /**
-     * Returns the {@link IsisConfiguration}; this will cause the configuration to be locked
-     */
-    public IsisConfigurationDefault getConfiguration() {
-        if(!locked) {
-            locked = true;
-            dumpResourcesToLog();
-        }
-        return configuration;
+    // -- PEEKING
+    
+    public String peekAtString(String key) {
+        return configuration.getString(key);
     }
 
-    /**
-     * Set once {@link #getConfiguration()} is called.
-     */
-    public boolean isLocked() {
-        return locked;
+    public String peekAtString(String key, String defaultValue) {
+        return configuration.getString(key, defaultValue);
     }
 
-    /**
-     * Creates a copy of the current {@link #getConfiguration()}, without locking.
-     *
-     * <p>
-     *     Used while bootstrapping, to obtain the web.server port etc.
-     * </p>
-     */
-    public IsisConfiguration peekConfiguration() {
-        IsisConfigurationDefault cfg = new IsisConfigurationDefault(resourceStreamSourceChain);
-        // no locking
-        Properties props = new Properties();
-        props.putAll(configuration.asMap());
-        cfg.add(props, ContainsPolicy.OVERWRITE);
-        return cfg;
+    public boolean peekAtBoolean(String key) {
+        return configuration.getBoolean(key);
     }
 
-    private void ensureNotLocked() {
-        if (locked) {
-            throw new IsisException("Configuration has been locked and cannot be changed");
-        }
+    public boolean peekAtBoolean(String key, boolean defaultValue) {
+        return configuration.getBoolean(key, defaultValue);
+    }
+    
+    public String[] peekAtList(String key) {
+        return configuration.getList(key);
     }
+    
+    // -- BUILD
 
-    public String peekAt(String key) {
-        return configuration.getString(key);
+    public IsisConfiguration build() {
+
+        dumpResourcesToLog();
+
+        final IsisConfigurationDefault copy = new IsisConfigurationDefault(resourceStreamSourceChain);
+        final Properties props = new Properties();
+        props.putAll(configuration.asMap());
+        copy.add(props, ContainsPolicy.OVERWRITE);
+
+        configuration = null; // once built this builder is no longer usable
+        
+        return copy;
     }
 
     // -- dumpResourcesToLog, toString
@@ -388,15 +313,18 @@ public final class IsisConfigurationBuilder {
         }
     }
 
-    private final static ToString<IsisConfigurationBuilder> toString =
-            ToString.<IsisConfigurationBuilder>
-    toString("resourceStream", x->x.resourceStreamSourceChain)
-    .thenToString("configResources", x->x.configurationResourcesFound)
-    ;
-
-    @Override
-    public String toString() {
-        return toString.toString(this);
-    }
+    
+
+    //TODO[2039]
+    //    private final static ToString<IsisConfigurationBuilder> toString =
+    //            ToString.<IsisConfigurationBuilder>
+    //    toString("resourceStream", x->x.resourceStreamSourceChain)
+    //    .thenToString("configResources", x->x.configurationResourcesFound)
+    //    ;
+    //
+    //    @Override
+    //    public String toString() {
+    //        return toString.toString(this);
+    //    }
 
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/config/IsisConfigurationDefault.java b/core/config/src/main/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefault.java
similarity index 92%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/config/IsisConfigurationDefault.java
rename to core/config/src/main/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefault.java
index 5ed1e25..2ac6850 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/config/IsisConfigurationDefault.java
+++ b/core/config/src/main/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefault.java
@@ -17,7 +17,7 @@
  *  under the License.
  */
 
-package org.apache.isis.core.commons.config;
+package org.apache.isis.core.commons.configbuilder;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -31,14 +31,14 @@ import java.util.StringTokenizer;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.services.config.ConfigurationProperty;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.core.commons.config.ConfigurationConstants;
+import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.config.IsisConfigurationException;
 import org.apache.isis.core.commons.exceptions.IsisException;
 import org.apache.isis.core.commons.resource.ResourceStreamSource;
-import org.apache.isis.core.metamodel.services.ServicesInjector;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
+
 
 /**
  * This object will typically be registered as the implementation of the {@link ConfigurationServiceInternal}
@@ -49,7 +49,7 @@ import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServi
  *     If an integration test is running, then the <code>IsisConfigurationForJdoIntegTests</code> will be used instead.
  * </p>
  */
-public class IsisConfigurationDefault implements ConfigurationServiceInternal {
+class IsisConfigurationDefault implements IsisConfiguration {
 
     private static final Logger LOG = LoggerFactory.getLogger(IsisConfigurationDefault.class);
     private final ResourceStreamSource resourceStreamSource;
@@ -90,27 +90,8 @@ public class IsisConfigurationDefault implements ConfigurationServiceInternal {
     // ////////////////////////////////////////////////
 
     /**
-     * How to handle the case when the configuration already contains the key being added.
-     */
-    public enum ContainsPolicy {
-        /**
-         * If the configuration already contains the key, then ignore the new value.
-         */
-        IGNORE,
-        /**
-         * If the configuration already contains the key, then overwrite with the new.
-         */
-        OVERWRITE,
-        /**
-         * If the configuration already contains the key, then throw an exception.
-         */
-        EXCEPTION
-    }
-
-    /**
      * Add the properties from an existing Properties object.
      */
-    @Programmatic
     public void add(final Properties properties, final ContainsPolicy containsPolicy) {
         for(Object key: properties.keySet()) {
             Object value = properties.get(key);
@@ -125,7 +106,6 @@ public class IsisConfigurationDefault implements ConfigurationServiceInternal {
      * @see #addPerPolicy(String, String, ContainsPolicy)
      * @see #put(String, String)
      */
-    @Programmatic
     public void add(final String key, final String value) {
         addPerPolicy(key, value, ContainsPolicy.IGNORE);
     }
@@ -137,7 +117,6 @@ public class IsisConfigurationDefault implements ConfigurationServiceInternal {
      * @see #add(String, String)
      * @see #addPerPolicy(String, String, ContainsPolicy)
      */
-    @Programmatic
     public void put(final String key, final String value) {
         addPerPolicy(key, value, ContainsPolicy.OVERWRITE);
     }
@@ -171,16 +150,11 @@ public class IsisConfigurationDefault implements ConfigurationServiceInternal {
                         "Configuration already has a key {}, value of {}%s, value of %s", key, properties.get(key)));
             }
         } else {
-            LOG.info("adding {} = {}", key , safe(key, value));
+            LOG.info("adding {} = {}", key , ConfigurationConstants.maskIfProtected(key, value));
             properties.put(key, value);
         }
     }
 
-    static String safe(final String key, final String value) {
-        return ConfigurationProperty.Util.maskIfProtected(key, value);
-    }
-
-    @Override
     public IsisConfiguration createSubset(final String prefix) {
         final IsisConfigurationDefault subset = new IsisConfigurationDefault(resourceStreamSource);
 
@@ -469,7 +443,7 @@ public class IsisConfigurationDefault implements ConfigurationServiceInternal {
 
 
     // -- ConfigurationService impl
-    @Override
+//    @Override
     public String getProperty(final String name) {
         initAppPropertiesIfRequired();
         return applicationProperties.getProperty(name);
@@ -493,7 +467,7 @@ public class IsisConfigurationDefault implements ConfigurationServiceInternal {
     }
 
 
-    @Override
+//    @Override
     public List<String> getPropertyNames() {
         initAppPropertiesIfRequired();
         final List<String> list = _Lists.newArrayList();
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS.java b/core/config/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS.java
rename to core/config/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariablesIsisPrefix.java b/core/config/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariablesIsisPrefix.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariablesIsisPrefix.java
rename to core/config/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariablesIsisPrefix.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForSystemProperties.java b/core/config/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForSystemProperties.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForSystemProperties.java
rename to core/config/src/main/java/org/apache/isis/core/commons/configbuilder/PrimerForSystemProperties.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/PropertiesReader.java b/core/config/src/main/java/org/apache/isis/core/commons/configbuilder/PropertiesReader.java
similarity index 86%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/PropertiesReader.java
rename to core/config/src/main/java/org/apache/isis/core/commons/configbuilder/PropertiesReader.java
index 2c58d15..53cdd67 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/configbuilder/PropertiesReader.java
+++ b/core/config/src/main/java/org/apache/isis/core/commons/configbuilder/PropertiesReader.java
@@ -23,7 +23,6 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.Properties;
 
-import org.apache.isis.core.commons.lang.CloseableExtensions;
 import org.apache.isis.core.commons.resource.ResourceStreamSource;
 
 /**
@@ -35,15 +34,11 @@ class PropertiesReader {
 
     public PropertiesReader(final ResourceStreamSource resourceStream, final String configurationResource) throws IOException {
 
-        InputStream in = null;
-        try {
-            in = resourceStream.readResource(configurationResource);
+        try (InputStream in = resourceStream.readResource(configurationResource)){
             if (in == null) {
                 throw new IOException("Unable to find resource " + configurationResource);
             }
             properties.load(in);
-        } finally {
-            CloseableExtensions.closeSafely(in);
         }
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSource.java b/core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSource.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSource.java
rename to core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSource.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceAbstract.java b/core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceAbstract.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceAbstract.java
rename to core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceAbstract.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceChainOfResponsibility.java b/core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceChainOfResponsibility.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceChainOfResponsibility.java
rename to core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceChainOfResponsibility.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceComposite.java b/core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceComposite.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceComposite.java
rename to core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceComposite.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java b/core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java
similarity index 93%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java
rename to core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java
index f80cf83..dd0115e 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java
+++ b/core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceContextLoaderClassPath.java
@@ -22,7 +22,7 @@ package org.apache.isis.core.commons.resource;
 import java.io.InputStream;
 
 import org.apache.isis.commons.internal.context._Context;
-import org.apache.isis.core.commons.lang.StringExtensions;
+import org.apache.isis.commons.internal.resources._Resources;
 
 /**
  * Loads the properties from the ContextClassLoader.
@@ -51,7 +51,7 @@ public class ResourceStreamSourceContextLoaderClassPath extends ResourceStreamSo
     @Override
     protected InputStream doReadResource(final String resourcePath) {
         final ClassLoader classLoader = _Context.getDefaultClassLoader();
-        final String path = StringExtensions.combinePath(prefix, resourcePath);
+        final String path = _Resources.combinePath(prefix, resourcePath);
         return classLoader.getResourceAsStream(path);
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceCurrentClassClassPath.java b/core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceCurrentClassClassPath.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceCurrentClassClassPath.java
rename to core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceCurrentClassClassPath.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceFileSystem.java b/core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceFileSystem.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceFileSystem.java
rename to core/config/src/main/java/org/apache/isis/core/commons/resource/ResourceStreamSourceFileSystem.java
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/resource/package-info.java b/core/config/src/main/java/org/apache/isis/core/commons/resource/package-info.java
similarity index 100%
rename from core/metamodel/src/main/java/org/apache/isis/core/commons/resource/package-info.java
rename to core/config/src/main/java/org/apache/isis/core/commons/resource/package-info.java
diff --git a/core/applib/src/test/java/org/apache/isis/applib/services/config/ConfigurationProperty_isProtected_Test.java b/core/config/src/test/java/org/apache/isis/core/commons/config/ConfigurationConstants_isProtected_Test.java
similarity index 52%
rename from core/applib/src/test/java/org/apache/isis/applib/services/config/ConfigurationProperty_isProtected_Test.java
rename to core/config/src/test/java/org/apache/isis/core/commons/config/ConfigurationConstants_isProtected_Test.java
index 285ed80..4f6d058 100644
--- a/core/applib/src/test/java/org/apache/isis/applib/services/config/ConfigurationProperty_isProtected_Test.java
+++ b/core/config/src/test/java/org/apache/isis/core/commons/config/ConfigurationConstants_isProtected_Test.java
@@ -16,7 +16,7 @@
  *  specific language governing permissions and limitations
  *  under the License.
  */
-package org.apache.isis.applib.services.config;
+package org.apache.isis.core.commons.config;
 
 import org.junit.Test;
 
@@ -24,43 +24,43 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-public class ConfigurationProperty_isProtected_Test {
+public class ConfigurationConstants_isProtected_Test {
 
     @Test
     public void null_is_not() {
-        assertFalse(ConfigurationProperty.Util.isProtected(null));
+        assertFalse(ConfigurationConstants.isProtected(null));
 
-        assertEquals("xxx", ConfigurationProperty.Util.maskIfProtected(null, "xxx"));
+        assertEquals("xxx", ConfigurationConstants.maskIfProtected(null, "xxx"));
     }
 
     @Test
     public void empty_is_not() {
-        assertFalse(ConfigurationProperty.Util.isProtected(""));
+        assertFalse(ConfigurationConstants.isProtected(""));
     }
 
     @Test
     public void password_is() {
-        assertTrue(ConfigurationProperty.Util.isProtected("foo.PassWord.bar"));
-        assertTrue(ConfigurationProperty.Util.isProtected("password.bar"));
-        assertTrue(ConfigurationProperty.Util.isProtected("foo.PASSWORD"));
+        assertTrue(ConfigurationConstants.isProtected("foo.PassWord.bar"));
+        assertTrue(ConfigurationConstants.isProtected("password.bar"));
+        assertTrue(ConfigurationConstants.isProtected("foo.PASSWORD"));
 
-        assertEquals("********", ConfigurationProperty.Util.maskIfProtected("password", "xxx"));
+        assertEquals("********", ConfigurationConstants.maskIfProtected("password", "xxx"));
     }
 
     @Test
     public void apiKey_is() {
-        assertTrue(ConfigurationProperty.Util.isProtected("foo.apiKey.bar"));
-        assertTrue(ConfigurationProperty.Util.isProtected("APIKEY.bar"));
-        assertTrue(ConfigurationProperty.Util.isProtected("foo.apikey"));
+        assertTrue(ConfigurationConstants.isProtected("foo.apiKey.bar"));
+        assertTrue(ConfigurationConstants.isProtected("APIKEY.bar"));
+        assertTrue(ConfigurationConstants.isProtected("foo.apikey"));
     }
     @Test
     public void authToken_is() {
-        assertTrue(ConfigurationProperty.Util.isProtected("foo.authToken.bar"));
-        assertTrue(ConfigurationProperty.Util.isProtected("AUTHTOKEN.bar"));
-        assertTrue(ConfigurationProperty.Util.isProtected("foo.authtoken"));
+        assertTrue(ConfigurationConstants.isProtected("foo.authToken.bar"));
+        assertTrue(ConfigurationConstants.isProtected("AUTHTOKEN.bar"));
+        assertTrue(ConfigurationConstants.isProtected("foo.authtoken"));
     }
     @Test
     public void otherwise_is_not() {
-        assertFalse(ConfigurationProperty.Util.isProtected("foo"));
+        assertFalse(ConfigurationConstants.isProtected("foo"));
     }
 }
\ No newline at end of file
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefault_safe_Test.java b/core/config/src/test/java/org/apache/isis/core/commons/config/ConfigurationConstants_mask_Test.java
similarity index 69%
rename from core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefault_safe_Test.java
rename to core/config/src/test/java/org/apache/isis/core/commons/config/ConfigurationConstants_mask_Test.java
index 4a167eb..6c1631e 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefault_safe_Test.java
+++ b/core/config/src/test/java/org/apache/isis/core/commons/config/ConfigurationConstants_mask_Test.java
@@ -20,30 +20,32 @@ package org.apache.isis.core.commons.config;
 
 import org.junit.Test;
 
+import org.apache.isis.core.commons.config.ConfigurationConstants;
+
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.is;
 import static org.junit.Assert.assertThat;
 
-public class IsisConfigurationDefault_safe_Test {
+public class ConfigurationConstants_mask_Test {
 
     @Test
     public void not_a_password() {
-        assertThat(IsisConfigurationDefault.safe("foo", "bar"), is(equalTo("bar")));
+        assertThat(ConfigurationConstants.maskIfProtected("foo", "bar"), is(equalTo("bar")));
     }
 
     @Test
     public void a_password() {
-        assertThat(IsisConfigurationDefault.safe("xyz.password.abc", "bar"), is(equalTo("********")));
+        assertThat(ConfigurationConstants.maskIfProtected("xyz.password.abc", "bar"), is(equalTo("********")));
     }
 
     @Test
     public void a_PassWord() {
-        assertThat(IsisConfigurationDefault.safe("xyz.PassWord.abc", "bar"), is(equalTo("********")));
+        assertThat(ConfigurationConstants.maskIfProtected("xyz.PassWord.abc", "bar"), is(equalTo("********")));
     }
 
     @Test
     public void is_null() {
-        assertThat(IsisConfigurationDefault.safe(null, "bar"), is(equalTo("bar")));
+        assertThat(ConfigurationConstants.maskIfProtected(null, "bar"), is(equalTo("bar")));
     }
 
 }
\ No newline at end of file
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder_PeekConfigurationTest.java b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder_PeekConfigurationTest.java
similarity index 81%
rename from core/metamodel/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder_PeekConfigurationTest.java
rename to core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder_PeekConfigurationTest.java
index 36739b8..6fafc22 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder_PeekConfigurationTest.java
+++ b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationBuilder_PeekConfigurationTest.java
@@ -43,15 +43,17 @@ public class IsisConfigurationBuilder_PeekConfigurationTest extends TestCase {
     	
     	// pre-conditions
     	assertNull(configuration);
-    	assertEquals("val", configurationBuilder.configuration.getString("isis.test"));
-    	assertFalse(configurationBuilder.isLocked());
+    	assertEquals("val", configurationBuilder.peekAtString("isis.test"));
     	
-    	// peek into the configuration
-    	configuration = configurationBuilder.peekConfiguration();
+    	configuration = configurationBuilder.build();
     	
-    	// invariant holds
-    	assertEquals("val", configurationBuilder.configuration.getString("isis.test"));
-    	assertFalse(configurationBuilder.isLocked());
+    	// builder is no longer usable
+    	try {
+    	    assertEquals("val", configurationBuilder.peekAtString("isis.test"));
+    	    fail("should throw");
+    	} catch (NullPointerException e) {
+    	    // expected
+        }
     	
     	// post-conditions
     	assertNotNull(configuration);
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefaultTest_createSubset.java b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefaultTest_createSubset.java
similarity index 94%
rename from core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefaultTest_createSubset.java
rename to core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefaultTest_createSubset.java
index bb68519..0272385 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefaultTest_createSubset.java
+++ b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefaultTest_createSubset.java
@@ -16,7 +16,7 @@
  *  specific language governing permissions and limitations
  *  under the License.
  */
-package org.apache.isis.core.commons.config;
+package org.apache.isis.core.commons.configbuilder;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;
@@ -27,6 +27,9 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
+import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationDefault;
+
 public class IsisConfigurationDefaultTest_createSubset {
     
     private IsisConfigurationDefault configuration;
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefault_PropertNamesTest.java b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefault_PropertNamesTest.java
similarity index 87%
rename from core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefault_PropertNamesTest.java
rename to core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefault_PropertNamesTest.java
index 03b812d..af42298 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefault_PropertNamesTest.java
+++ b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefault_PropertNamesTest.java
@@ -17,10 +17,12 @@
  *  under the License.
  */
 
-package org.apache.isis.core.commons.config;
+package org.apache.isis.core.commons.configbuilder;
 
 import java.util.Properties;
 
+import org.apache.isis.core.commons.config.IsisConfiguration;
+
 import junit.framework.TestCase;
 
 public class IsisConfigurationDefault_PropertNamesTest extends TestCase {
@@ -39,12 +41,12 @@ public class IsisConfigurationDefault_PropertNamesTest extends TestCase {
         final Properties p = new Properties();
         p.put("isis.bool", "on");
         p.put("isis.str", "original");
-        configuration.add(p, IsisConfigurationDefault.ContainsPolicy.IGNORE);
+        configuration.add(p, IsisConfiguration.ContainsPolicy.IGNORE);
 
         final Properties p1 = new Properties();
         p1.put("isis.int", "1");
         p1.put("isis.str", "replacement");
-        configuration.add(p1, IsisConfigurationDefault.ContainsPolicy.IGNORE);
+        configuration.add(p1, IsisConfiguration.ContainsPolicy.IGNORE);
     }
 
     public void testDuplicatedPropertyIsNotReplaced() {
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefault_WhitespaceTest.java b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefault_WhitespaceTest.java
similarity index 94%
rename from core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefault_WhitespaceTest.java
rename to core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefault_WhitespaceTest.java
index 03d71bc..eb61814 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/commons/config/IsisConfigurationDefault_WhitespaceTest.java
+++ b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/IsisConfigurationDefault_WhitespaceTest.java
@@ -17,10 +17,12 @@
  *  under the License.
  */
 
-package org.apache.isis.core.commons.config;
+package org.apache.isis.core.commons.configbuilder;
 
 import java.util.Properties;
 
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationDefault;
+
 import junit.framework.TestCase;
 
 public class IsisConfigurationDefault_WhitespaceTest extends TestCase {
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS_Test.java b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS_Test.java
similarity index 91%
rename from core/metamodel/src/test/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS_Test.java
rename to core/config/src/test/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS_Test.java
index 20c412e..e22321a 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS_Test.java
+++ b/core/config/src/test/java/org/apache/isis/core/commons/configbuilder/PrimerForEnvironmentVariableISIS_OPTS_Test.java
@@ -21,7 +21,7 @@ package org.apache.isis.core.commons.configbuilder;
 import org.junit.Before;
 import org.junit.Test;
 
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.config.IsisConfiguration;
 
 import static org.hamcrest.Matchers.is;
 import static org.junit.Assert.assertThat;
@@ -54,7 +54,7 @@ public class PrimerForEnvironmentVariableISIS_OPTS_Test {
         primer.prime(builder);
 
         // then
-        final IsisConfigurationDefault configuration = builder.getConfiguration();
+        final IsisConfiguration configuration = builder.build();
         assertThat(configuration.asMap().size(), is(1));
         assertThat(configuration.getString("isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionURL"), is("jdbc:sqlserver://HALCHILLBLAST;instance=.;databaseName=estatio"));
     }
@@ -76,7 +76,7 @@ public class PrimerForEnvironmentVariableISIS_OPTS_Test {
         primer.prime(builder);
 
         // then
-        final IsisConfigurationDefault configuration = builder.getConfiguration();
+        final IsisConfiguration configuration = builder.build();
 
         assertThat(configuration.asMap().size(), is(1));
         assertThat(configuration.getString("isis.persistor.datanucleus.impl.javax.jdo.option.ConnectionDriverName"), is("com.microsoft.sqlserver.jdbc.SQLServerDriver"));
@@ -99,7 +99,7 @@ public class PrimerForEnvironmentVariableISIS_OPTS_Test {
         primer.prime(builder);
 
         // then
-        final IsisConfigurationDefault configuration = builder.getConfiguration();
+        final IsisConfiguration configuration = builder.build();
         assertThat(configuration.asMap().size(), is(0));
     }
 
diff --git a/core/detached-tests/src/test/java/org/apache/isis/core/runtime/services/ServiceInjectorTestUsingCodegenPlugin.java b/core/detached-tests/src/test/java/org/apache/isis/core/runtime/services/ServiceInjectorTestUsingCodegenPlugin.java
index 853c218..e096653 100644
--- a/core/detached-tests/src/test/java/org/apache/isis/core/runtime/services/ServiceInjectorTestUsingCodegenPlugin.java
+++ b/core/detached-tests/src/test/java/org/apache/isis/core/runtime/services/ServiceInjectorTestUsingCodegenPlugin.java
@@ -16,9 +16,6 @@
  */
 package org.apache.isis.core.runtime.services;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
 import java.util.List;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
@@ -36,11 +33,12 @@ import org.junit.Rule;
 import org.junit.Test;
 
 import org.apache.isis.commons.internal.collections._Lists;
-import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
 public class ServiceInjectorTestUsingCodegenPlugin {
 
     @Rule
@@ -52,17 +50,16 @@ public class ServiceInjectorTestUsingCodegenPlugin {
     @Before
     public void setUp() throws Exception {
 
-        final IsisConfiguration configuration = new IsisConfigurationDefault();
-        
         serviceInstantiator = new ServiceInstantiator();
-        serviceInstantiator.setConfiguration(configuration);
         
-        final Object[] services = {
+        final List<Object> services = _Lists.of(
                 serviceInstantiator.createInstance(SingletonCalculator.class),
                 serviceInstantiator.createInstance(AccumulatingCalculator.class)
-                };
+                );
         
-        serviceInjector = new ServicesInjector(_Lists.of(services), configuration);
+        serviceInjector = ServicesInjector.builderForTesting()
+                .addServices(services)
+                .build();
     }
 
     @Test
diff --git a/core/detached-tests/src/test/java/org/apache/isis/core/runtime/services/ServiceInstantiatorTestUsingCodegenPlugin.java b/core/detached-tests/src/test/java/org/apache/isis/core/runtime/services/ServiceInstantiatorTestUsingCodegenPlugin.java
index c8e354c..40c69c3 100644
--- a/core/detached-tests/src/test/java/org/apache/isis/core/runtime/services/ServiceInstantiatorTestUsingCodegenPlugin.java
+++ b/core/detached-tests/src/test/java/org/apache/isis/core/runtime/services/ServiceInstantiatorTestUsingCodegenPlugin.java
@@ -16,10 +16,6 @@
  */
 package org.apache.isis.core.runtime.services;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertThat;
-
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.BrokenBarrierException;
@@ -39,10 +35,13 @@ import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+
 public class ServiceInstantiatorTestUsingCodegenPlugin {
 
     @Rule
@@ -58,7 +57,6 @@ public class ServiceInstantiatorTestUsingCodegenPlugin {
     public void setUp() throws Exception {
 
         serviceInstantiator = new ServiceInstantiator();
-        serviceInstantiator.setConfiguration(new IsisConfigurationDefault());
     }
 
     @Test
diff --git a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/components/IsisSystemEnvironmentPluginForTesting.java b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/components/IsisSystemEnvironmentPluginForTesting.java
index 66f7bd7..822598c 100644
--- a/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/components/IsisSystemEnvironmentPluginForTesting.java
+++ b/core/integtestsupport/src/main/java/org/apache/isis/core/integtestsupport/components/IsisSystemEnvironmentPluginForTesting.java
@@ -2,7 +2,6 @@ package org.apache.isis.core.integtestsupport.components;
 
 import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.plugins.environment.DeploymentType;
 import org.apache.isis.core.plugins.environment.IsisSystemEnvironment;
 import org.apache.isis.core.plugins.environment.IsisSystemEnvironmentPlugin;
@@ -38,8 +37,7 @@ public class IsisSystemEnvironmentPluginForTesting implements IsisSystemEnvironm
     // HELPER
 
     private IsisConfiguration getConfiguration() {
-        // TODO just a stub
-        IsisConfigurationDefault configuration = new IsisConfigurationDefault();
+        IsisConfiguration configuration = IsisConfiguration.loadDefault();
         return configuration;
     }
 
diff --git a/core/metamodel/pom.xml b/core/metamodel/pom.xml
index 8bf7d1b..34d1904 100644
--- a/core/metamodel/pom.xml
+++ b/core/metamodel/pom.xml
@@ -80,6 +80,11 @@
             <type>test-jar</type>
             <scope>test</scope>
         </dependency>
+        
+        <dependency>
+            <groupId>org.apache.isis.core</groupId>
+            <artifactId>isis-core-config</artifactId>
+        </dependency>
 
 		<!-- command line options support  -->
         <dependency>
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/components/InstallerAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/components/InstallerAbstract.java
index c69e50c..66c121b 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/components/InstallerAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/components/InstallerAbstract.java
@@ -19,21 +19,19 @@
 
 package org.apache.isis.core.commons.components;
 
-import static org.apache.isis.commons.internal.base._NullSafe.stream;
-
 import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 
 import org.apache.isis.commons.internal.collections._Lists;
-import org.apache.isis.core.commons.config.IsisConfiguration;
+
+import static org.apache.isis.commons.internal.base._NullSafe.stream;
 
 public abstract class InstallerAbstract implements Installer {
 
     // -- constructor, fields
 
     private final String name;
-    private final IsisConfiguration isisConfiguration;
 
     /**
      * Subclasses should pass in the type defined as a constant in the
@@ -45,11 +43,8 @@ public abstract class InstallerAbstract implements Installer {
      * <tt>PersistenceMechanismInstaller</tt> should pass this constant value up
      * to this constructor.
      */
-    public InstallerAbstract(
-            final String name,
-            final IsisConfiguration isisConfiguration) {
+    public InstallerAbstract(final String name) {
         this.name = name;
-        this.isisConfiguration = isisConfiguration;
     }
 
 
@@ -58,11 +53,6 @@ public abstract class InstallerAbstract implements Installer {
         return name;
     }
 
-    public IsisConfiguration getConfiguration() {
-        return isisConfiguration;
-    }
-
-
     // -- init, shutdown
 
     /**
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/StringExtensions.java b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/StringExtensions.java
index f4530c7..a1f5ff8 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/StringExtensions.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/commons/lang/StringExtensions.java
@@ -26,6 +26,7 @@ import java.util.StringTokenizer;
 
 import org.apache.isis.applib.util.Enums;
 import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.commons.internal.resources._Resources;
 
 public final class StringExtensions {
 
@@ -290,19 +291,7 @@ public final class StringExtensions {
     }
 
     public static String combinePath(final String extendee, final String suffix) {
-        if (_Strings.isNullOrEmpty(extendee) && _Strings.isNullOrEmpty(suffix)) {
-            return "";
-        }
-        if (_Strings.isNullOrEmpty(extendee)) {
-            return suffix;
-        }
-        if (_Strings.isNullOrEmpty(suffix)) {
-            return extendee;
-        }
-        if (extendee.endsWith("/") || suffix.startsWith("/")) {
-            return extendee + suffix;
-        }
-        return extendee + "/" + suffix;
+        return _Resources.combinePath(extendee, suffix);
     }
 
     /**
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/MetaModelRefiner.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/MetaModelRefiner.java
index 8e60d17..36ede77 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/MetaModelRefiner.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/MetaModelRefiner.java
@@ -20,7 +20,6 @@
 package org.apache.isis.core.metamodel.facetapi;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.progmodel.ProgrammingModel;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidator;
 
@@ -34,6 +33,6 @@ import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidator;
 public interface MetaModelRefiner extends MetaModelValidatorRefiner {
 
     @Programmatic
-    void refineProgrammingModel(ProgrammingModel programmingModel, IsisConfiguration configuration);
+    void refineProgrammingModel(ProgrammingModel programmingModel);
 
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/MetaModelValidatorRefiner.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/MetaModelValidatorRefiner.java
index 9e0ff30..b46f46e 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/MetaModelValidatorRefiner.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facetapi/MetaModelValidatorRefiner.java
@@ -20,7 +20,6 @@
 package org.apache.isis.core.metamodel.facetapi;
 
 import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidator;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorComposite;
 
@@ -34,6 +33,6 @@ import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorCom
 public interface MetaModelValidatorRefiner {
 
     @Programmatic
-    void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration);
+    void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator);
 
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/FacetFactoryAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/FacetFactoryAbstract.java
index 1f6996e..656e2e4 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/FacetFactoryAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/FacetFactoryAbstract.java
@@ -22,12 +22,12 @@ package org.apache.isis.core.metamodel.facets;
 import java.util.List;
 
 import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.services.ServicesInjectorAware;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
 
 public abstract class FacetFactoryAbstract implements FacetFactory, ServicesInjectorAware {
@@ -76,12 +76,8 @@ public abstract class FacetFactoryAbstract implements FacetFactory, ServicesInje
     }
 
     protected IsisConfiguration getConfiguration() {
-        final ConfigurationServiceInternal configurationServiceInternal = servicesInjector
-                .getConfigurationServiceInternal();
-        return configurationServiceInternal;
+        return _Config.getConfigurationElseThrow();
     }
 
 
-
-
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/MethodPrefixBasedFacetFactoryAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/MethodPrefixBasedFacetFactoryAbstract.java
index 366e3b0..7d3f90c 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/MethodPrefixBasedFacetFactoryAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/MethodPrefixBasedFacetFactoryAbstract.java
@@ -25,7 +25,7 @@ import java.util.List;
 import java.util.Objects;
 import java.util.stream.Stream;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.spec.ObjectSpecification;
 import org.apache.isis.core.metamodel.spec.feature.Contributed;
@@ -66,7 +66,7 @@ implements MethodPrefixBasedFacetFactory {
     }
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
         if(orphanValidation == OrphanValidation.DONT_VALIDATE) {
             return;
         }
@@ -75,7 +75,7 @@ implements MethodPrefixBasedFacetFactory {
             @Override
             public boolean visit(final ObjectSpecification objectSpec, final ValidationFailures validationFailures) {
 
-                boolean noParamsOnly = configuration.getBoolean(
+                boolean noParamsOnly = _Config.getConfiguration().getBoolean(
                         MethodPrefixBasedFacetFactoryAbstract.ISIS_REFLECTOR_VALIDATOR_NO_PARAMS_ONLY_KEY,
                         MethodPrefixBasedFacetFactoryAbstract.ISIS_REFLECTOR_VALIDATOR_NO_PARAMS_ONLY_DEFAULT);
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/ActionChoicesForCollectionParameterFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/ActionChoicesForCollectionParameterFacetFactory.java
index 886e3a0..1e75e05 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/ActionChoicesForCollectionParameterFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/ActionChoicesForCollectionParameterFacetFactory.java
@@ -19,7 +19,7 @@
 
 package org.apache.isis.core.metamodel.facets.actions.action;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner;
 import org.apache.isis.core.metamodel.facets.FacetFactoryAbstract;
@@ -60,9 +60,9 @@ implements MetaModelValidatorRefiner {
     }
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
 
-        final boolean doCheck = configuration.getBoolean(
+        final boolean doCheck = _Config.getConfiguration().getBoolean(
                 ISIS_REFLECTOR_VALIDATOR_ACTION_COLLECTION_PARAMETER_CHOICES_KEY,
                 ISIS_REFLECTOR_VALIDATOR_ACTION_COLLECTION_PARAMETER_CHOICES_DEFAULT);
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/ActionInvocationFacetForDomainEventAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/ActionInvocationFacetForDomainEventAbstract.java
index 53bab80..4ddbdf0 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/ActionInvocationFacetForDomainEventAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/action/invocation/ActionInvocationFacetForDomainEventAbstract.java
@@ -54,6 +54,7 @@ import org.apache.isis.applib.services.xactn.TransactionService;
 import org.apache.isis.applib.services.xactn.TransactionState;
 import org.apache.isis.commons.internal.base._Casts;
 import org.apache.isis.commons.internal.base._Strings;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.commons.config.IsisConfiguration;
@@ -117,7 +118,7 @@ implements ImperativeFacet {
         this.authenticationSessionProvider = servicesInjector.getAuthenticationSessionProvider();
         this.persistenceSessionServiceInternal = servicesInjector.getPersistenceSessionServiceInternal();
         this.servicesInjector = servicesInjector;
-        this.configuration = servicesInjector.getConfigurationServiceInternal();
+        this.configuration = _Config.getConfiguration();
         this.domainEventHelper = new DomainEventHelper(this.servicesInjector);
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/homepage/annotation/HomePageFacetAnnotationFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/homepage/annotation/HomePageFacetAnnotationFactory.java
index bb3ce69..661f812 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/homepage/annotation/HomePageFacetAnnotationFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/actions/homepage/annotation/HomePageFacetAnnotationFactory.java
@@ -19,15 +19,12 @@
 
 package org.apache.isis.core.metamodel.facets.actions.homepage.annotation;
 
-import static org.apache.isis.commons.internal.functions._Predicates.not;
-
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import org.apache.isis.applib.annotation.HomePage;
 import org.apache.isis.commons.internal.collections._Lists;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner;
@@ -43,6 +40,8 @@ import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorVis
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorVisiting.Visitor;
 import org.apache.isis.core.metamodel.specloader.validator.ValidationFailures;
 
+import static org.apache.isis.commons.internal.functions._Predicates.not;
+
 public class HomePageFacetAnnotationFactory extends FacetFactoryAbstract implements MetaModelValidatorRefiner{
 
     public HomePageFacetAnnotationFactory() {
@@ -63,7 +62,7 @@ public class HomePageFacetAnnotationFactory extends FacetFactoryAbstract impleme
      * @see org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner#refineMetaModelValidator(org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorComposite, org.apache.isis.core.commons.config.IsisConfiguration)
      */
     @Override
-    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(newValidatorVisitor()));
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessor.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessor.java
index eec82ae..e974792 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessor.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessor.java
@@ -25,8 +25,8 @@ import java.util.List;
 import java.util.Map;
 
 import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapterProvider;
 import org.apache.isis.core.metamodel.consent.InteractionInitiatedBy;
@@ -48,11 +48,10 @@ implements ImperativeFacet {
             final ObjectSpecification typeSpec,
             final Method method,
             final FacetHolder holder,
-            final IsisConfiguration isisConfiguration,
             final SpecificationLoader specificationLoader,
             final AuthenticationSessionProvider authenticationSessionProvider,
             final ObjectAdapterProvider adapterManager) {
-        super(typeSpec, holder, isisConfiguration, specificationLoader, authenticationSessionProvider, adapterManager);
+        super(typeSpec, holder, specificationLoader, authenticationSessionProvider, adapterManager);
         this.method = method;
     }
 
@@ -81,7 +80,7 @@ implements ImperativeFacet {
         
         final ObjectAdapter collectionAdapter = getObjectAdapterProvider().adapterFor(collectionOrArray);
 
-        boolean filterForVisibility = getConfiguration().getBoolean("isis.reflector.facet.filterVisibility", true);
+        boolean filterForVisibility = _Config.getConfiguration().getBoolean("isis.reflector.facet.filterVisibility", true);
         if(filterForVisibility) {
             final List<ObjectAdapter> visibleAdapters =
                     ObjectAdapter.Util.visibleAdapters(
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessorFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessorFactory.java
index 5579ea8..93ef1fd 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessorFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/accessor/CollectionAccessorFacetViaAccessorFactory.java
@@ -60,7 +60,7 @@ extends PropertyOrCollectionIdentifyingFacetFactoryAbstract {
         FacetUtil.addFacet(
                 new CollectionAccessorFacetViaAccessor(
                         typeSpec, accessorMethod, holder,
-                        getConfiguration(), getSpecificationLoader(),
+                        getSpecificationLoader(),
                         getAuthenticationSessionProvider(), adapterProvider
                         ));
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/sortedby/annotation/SortedByFacetAnnotationFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/sortedby/annotation/SortedByFacetAnnotationFactory.java
index cf54ba0..7545b7f 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/sortedby/annotation/SortedByFacetAnnotationFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/collections/sortedby/annotation/SortedByFacetAnnotationFactory.java
@@ -54,7 +54,7 @@ public class SortedByFacetAnnotationFactory extends FacetFactoryAbstract impleme
     }
 
     @Override
-    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(newValidatorVisitor()));
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/jaxb/JaxbFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/jaxb/JaxbFacetFactory.java
index 4ca73a0..017c966 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/jaxb/JaxbFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/jaxb/JaxbFacetFactory.java
@@ -32,6 +32,7 @@ import javax.xml.bind.annotation.XmlTransient;
 import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 
 import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.JdoMetamodelUtil;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
@@ -169,10 +170,9 @@ implements MetaModelValidatorRefiner {
     // --
 
     @Override
-    public void refineMetaModelValidator(
-            final MetaModelValidatorComposite metaModelValidator,
-            final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
 
+        final IsisConfiguration configuration = _Config.getConfiguration(); 
         final List<TypeValidator> typeValidators = getTypeValidators(configuration);
         final List<PropertyValidator> propertyValidators = getPropertyValidators(configuration);
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/ViewModelSemanticCheckingFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/ViewModelSemanticCheckingFacetFactory.java
index 0fe13be..0446383 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/ViewModelSemanticCheckingFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/ViewModelSemanticCheckingFacetFactory.java
@@ -171,7 +171,7 @@ public class ViewModelSemanticCheckingFacetFactory extends FacetFactoryAbstract
 
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(validator);
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/bookmarkpolicy/bookmarkable/BookmarkPolicyFacetFallbackFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/bookmarkpolicy/bookmarkable/BookmarkPolicyFacetFallbackFactory.java
index 0353744..b1c1083 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/bookmarkpolicy/bookmarkable/BookmarkPolicyFacetFallbackFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/bookmarkpolicy/bookmarkable/BookmarkPolicyFacetFallbackFactory.java
@@ -22,7 +22,6 @@ package org.apache.isis.core.metamodel.facets.object.bookmarkpolicy.bookmarkable
 import java.util.stream.Stream;
 
 import org.apache.isis.applib.annotation.BookmarkPolicy;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner;
@@ -57,7 +56,7 @@ public class BookmarkPolicyFacetFallbackFactory extends FacetFactoryAbstract imp
      * Violation if there is an action that is bookmarkable but does not have safe action semantics.
      */
     @Override
-    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(new MetaModelValidatorVisiting.Visitor() {
 
             @Override
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/DomainObjectAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/DomainObjectAnnotationFacetFactory.java
index cc2c67f..7075157 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/DomainObjectAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobject/DomainObjectAnnotationFacetFactory.java
@@ -37,7 +37,6 @@ import org.apache.isis.applib.events.lifecycle.ObjectUpdatedEvent;
 import org.apache.isis.applib.events.lifecycle.ObjectUpdatingEvent;
 import org.apache.isis.applib.services.HasUniqueId;
 import org.apache.isis.commons.internal.collections._Maps;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
@@ -460,7 +459,7 @@ implements MetaModelValidatorRefiner, PostConstructMethodCache {
     // //////////////////////////////////////
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
 
         metaModelValidator.add(new MetaModelValidatorVisiting(new MetaModelValidatorVisiting.Visitor() {
             @Override
@@ -511,18 +510,12 @@ implements MetaModelValidatorRefiner, PostConstructMethodCache {
 
     // //////////////////////////////////////
 
-
     @Override
     public void setServicesInjector(final ServicesInjector servicesInjector) {
         super.setServicesInjector(servicesInjector);
-        //TODO [ahuber] unused because of side effects ?
-        IsisConfiguration configuration = getConfiguration();
-
         this.persistenceSessionServiceInternal = servicesInjector.getPersistenceSessionServiceInternal();
-
     }
 
-
     // //////////////////////////////////////
 
     private final Map<Class<?>, Optional<Method>> postConstructMethods = _Maps.newHashMap();
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobjectlayout/TitleFacetViaDomainObjectLayoutAnnotationUsingTitleUiEvent.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobjectlayout/TitleFacetViaDomainObjectLayoutAnnotationUsingTitleUiEvent.java
index 3ccd5fd..e56c2cd 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobjectlayout/TitleFacetViaDomainObjectLayoutAnnotationUsingTitleUiEvent.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainobjectlayout/TitleFacetViaDomainObjectLayoutAnnotationUsingTitleUiEvent.java
@@ -47,7 +47,8 @@ public class TitleFacetViaDomainObjectLayoutAnnotationUsingTitleUiEvent extends
     public static Facet create(
             final List<DomainObjectLayout> domainObjectLayouts,
             final ServicesInjector servicesInjector,
-            final IsisConfiguration configuration, final FacetHolder facetHolder) {
+            final IsisConfiguration configuration, 
+            final FacetHolder facetHolder) {
 
         return domainObjectLayouts.stream()
                 .map(DomainObjectLayout::titleUiEvent)
@@ -59,7 +60,7 @@ public class TitleFacetViaDomainObjectLayoutAnnotationUsingTitleUiEvent extends
                         configuration))
                 .findFirst()
                 .map(titleUiEventClass -> {
-                    final TranslationService translationService = servicesInjector.lookupService(TranslationService.class).orElse(null);;
+                    final TranslationService translationService = servicesInjector.lookupService(TranslationService.class).orElse(null);
                     final ObjectSpecification facetHolderAsSpec = (ObjectSpecification) facetHolder; // bit naughty...
                     final String translationContext = facetHolderAsSpec.getCorrespondingClass().getCanonicalName();
                     final EventBusService eventBusService = servicesInjector.lookupServiceElseFail(EventBusService.class);
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainservice/annotation/DomainServiceFacetAnnotationFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainservice/annotation/DomainServiceFacetAnnotationFactory.java
index de17cf2..f9773fa 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainservice/annotation/DomainServiceFacetAnnotationFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/domainservice/annotation/DomainServiceFacetAnnotationFactory.java
@@ -23,7 +23,7 @@ import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import org.apache.isis.applib.annotation.DomainService;
-import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
@@ -92,9 +92,9 @@ public class DomainServiceFacetAnnotationFactory extends FacetFactoryAbstract im
 
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
 
-        final boolean serviceActionsOnly = configuration.getBoolean(
+        final boolean serviceActionsOnly = _Config.getConfiguration().getBoolean(
                 ISIS_REFLECTOR_VALIDATOR_SERVICE_ACTIONS_ONLY_KEY,
                 ISIS_REFLECTOR_VALIDATOR_SERVICE_ACTIONS_ONLY_DEFAULT);
         if (serviceActionsOnly) {
@@ -135,7 +135,7 @@ public class DomainServiceFacetAnnotationFactory extends FacetFactoryAbstract im
             }));
         }
 
-        boolean mixinsOnly = configuration.getBoolean(
+        boolean mixinsOnly = _Config.getConfiguration().getBoolean(
                 ISIS_REFLECTOR_VALIDATOR_MIXINS_ONLY_KEY,
                 ISIS_REFLECTOR_VALIDATOR_MIXINS_ONLY_DEFAULT);
         if (mixinsOnly) {
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/mixin/MixinFacetForMixinAnnotationFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/mixin/MixinFacetForMixinAnnotationFactory.java
index ab56064..6f86b8e 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/mixin/MixinFacetForMixinAnnotationFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/mixin/MixinFacetForMixinAnnotationFactory.java
@@ -20,7 +20,6 @@
 package org.apache.isis.core.metamodel.facets.object.mixin;
 
 import org.apache.isis.applib.annotation.Mixin;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner;
@@ -57,7 +56,7 @@ public class MixinFacetForMixinAnnotationFactory extends FacetFactoryAbstract im
 
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(mixinTypeValidator);
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/navparent/annotation/NavigableParentAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/navparent/annotation/NavigableParentAnnotationFacetFactory.java
index 7ae60cd..5029f8c 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/navparent/annotation/NavigableParentAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/navparent/annotation/NavigableParentAnnotationFacetFactory.java
@@ -24,7 +24,6 @@ import java.util.List;
 
 import org.apache.isis.applib.annotation.PropertyLayout;
 import org.apache.isis.commons.internal.base._NullSafe;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
@@ -109,7 +108,7 @@ public class NavigableParentAnnotationFacetFactory extends FacetFactoryAbstract
      * <a href="https://issues.apache.org/jira/browse/ISIS-1816">ISIS-1816</a>.
      */
     @Override
-    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(new MetaModelValidatorVisiting.Visitor() {
 
             @Override
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/objectspecid/classname/ObjectSpecIdFacetDerivedFromClassNameFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/objectspecid/classname/ObjectSpecIdFacetDerivedFromClassNameFactory.java
index cbe493f..e55fe87 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/objectspecid/classname/ObjectSpecIdFacetDerivedFromClassNameFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/objectspecid/classname/ObjectSpecIdFacetDerivedFromClassNameFactory.java
@@ -25,7 +25,7 @@ import javax.xml.bind.annotation.XmlType;
 
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
@@ -93,9 +93,9 @@ MetaModelValidatorRefiner {
     }
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
 
-        final boolean doCheck = configuration.getBoolean(
+        final boolean doCheck = _Config.getConfiguration().getBoolean(
                 ISIS_REFLECTOR_VALIDATOR_EXPLICIT_OBJECT_TYPE_KEY,
                 ISIS_REFLECTOR_VALIDATOR_EXPLICIT_OBJECT_TYPE_DEFAULT);
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/recreatable/RecreatableObjectFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/recreatable/RecreatableObjectFacetFactory.java
index c47e4a2..d1b864f 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/recreatable/RecreatableObjectFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/recreatable/RecreatableObjectFacetFactory.java
@@ -101,7 +101,7 @@ implements MetaModelValidatorRefiner, PostConstructMethodCache {
     // //////////////////////////////////////
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(new MetaModelValidatorVisiting.Visitor() {
 
             @Override
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/title/annotation/TitleAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/title/annotation/TitleAnnotationFacetFactory.java
index c443458..989b199 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/title/annotation/TitleAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/title/annotation/TitleAnnotationFacetFactory.java
@@ -28,7 +28,6 @@ import java.util.stream.Collectors;
 import org.apache.isis.applib.annotation.Title;
 import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.commons.internal.collections._Lists;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapterProvider;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
@@ -152,7 +151,7 @@ public class TitleAnnotationFacetFactory extends FacetFactoryAbstract implements
      * precedence.
      */
     @Override
-    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(new MetaModelValidatorVisiting.Visitor() {
 
             @Override
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/value/annotcfg/ValueFacetAnnotation.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/value/annotcfg/ValueFacetAnnotation.java
index b301fc9..8da44af 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/value/annotcfg/ValueFacetAnnotation.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/value/annotcfg/ValueFacetAnnotation.java
@@ -21,7 +21,7 @@ package org.apache.isis.core.metamodel.facets.object.value.annotcfg;
 
 import org.apache.isis.applib.annotation.Value;
 import org.apache.isis.commons.internal.base._Strings;
-import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.object.value.ValueFacetAbstract;
 import org.apache.isis.core.metamodel.facets.object.value.vsp.ValueSemanticsProviderUtil;
@@ -29,13 +29,14 @@ import org.apache.isis.core.metamodel.services.ServicesInjector;
 
 public class ValueFacetAnnotation extends ValueFacetAbstract {
 
-    private static String semanticsProviderName(final Class<?> annotatedClass, final IsisConfiguration configuration) {
+    private static String semanticsProviderName(final Class<?> annotatedClass) {
         final Value annotation = annotatedClass.getAnnotation(Value.class);
         final String semanticsProviderName = annotation.semanticsProviderName();
         if (!_Strings.isNullOrEmpty(semanticsProviderName)) {
             return semanticsProviderName;
         }
-        return ValueSemanticsProviderUtil.semanticsProviderNameFromConfiguration(annotatedClass, configuration);
+        return ValueSemanticsProviderUtil
+                .semanticsProviderNameFromConfiguration(annotatedClass, _Config.getConfiguration());
     }
 
     private static Class<?> semanticsProviderClass(final Class<?> annotatedClass) {
@@ -43,12 +44,24 @@ public class ValueFacetAnnotation extends ValueFacetAbstract {
         return annotation.semanticsProviderClass();
     }
 
-    public ValueFacetAnnotation(final Class<?> annotatedClass, final FacetHolder holder, final ServicesInjector context) {
-        this(semanticsProviderName(annotatedClass, context.getConfigurationServiceInternal()), semanticsProviderClass(annotatedClass), holder, context);
+    public ValueFacetAnnotation(
+            final Class<?> annotatedClass, 
+            final FacetHolder holder, 
+            final ServicesInjector injector) {
+        
+        this(semanticsProviderName(annotatedClass), 
+                semanticsProviderClass(annotatedClass), holder, injector);
     }
 
-    private ValueFacetAnnotation(final String candidateSemanticsProviderName, final Class<?> candidateSemanticsProviderClass, final FacetHolder holder, final ServicesInjector context) {
-        super(ValueSemanticsProviderUtil.valueSemanticsProviderOrNull(candidateSemanticsProviderClass, candidateSemanticsProviderName), AddFacetsIfInvalidStrategy.DO_ADD, holder, context);
+    private ValueFacetAnnotation(
+            final String candidateSemanticsProviderName, 
+            final Class<?> candidateSemanticsProviderClass, 
+            final FacetHolder holder, 
+            final ServicesInjector injector) {
+        
+        super(ValueSemanticsProviderUtil
+                .valueSemanticsProviderOrNull(candidateSemanticsProviderClass, candidateSemanticsProviderName), 
+                AddFacetsIfInvalidStrategy.DO_ADD, holder, injector);
     }
 
     /**
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/value/vsp/ValueSemanticsProviderAndFacetAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/value/vsp/ValueSemanticsProviderAndFacetAbstract.java
index ae4201b..cd06b3a 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/value/vsp/ValueSemanticsProviderAndFacetAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/object/value/vsp/ValueSemanticsProviderAndFacetAbstract.java
@@ -30,6 +30,7 @@ import org.apache.isis.applib.adapters.EncoderDecoder;
 import org.apache.isis.applib.adapters.Parser;
 import org.apache.isis.applib.adapters.ValueSemanticsProvider;
 import org.apache.isis.applib.clock.Clock;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.config.ConfigurationConstants;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.exceptions.UnknownTypeException;
@@ -98,7 +99,7 @@ public abstract class ValueSemanticsProviderAndFacetAbstract<T> extends FacetAbs
         this.equalByContent = (equalByContent == EqualByContent.HONOURED);
         this.defaultValue = defaultValue;
 
-        this.configuration = context.getConfigurationServiceInternal();
+        this.configuration = _Config.getConfiguration();
         this.context = context;
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/parameter/ParameterAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/parameter/ParameterAnnotationFacetFactory.java
index 8626cba..5782b26 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/parameter/ParameterAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/param/parameter/ParameterAnnotationFacetFactory.java
@@ -26,7 +26,6 @@ import javax.annotation.Nullable;
 import javax.validation.constraints.Pattern;
 
 import org.apache.isis.applib.annotation.Parameter;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner;
@@ -145,7 +144,7 @@ public class ParameterAnnotationFacetFactory extends FacetFactoryAbstract implem
 
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(conflictingOptionalityValidator);
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/propcoll/accessor/PropertyOrCollectionAccessorFacetAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/propcoll/accessor/PropertyOrCollectionAccessorFacetAbstract.java
index 136852c..447cedb 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/propcoll/accessor/PropertyOrCollectionAccessorFacetAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/propcoll/accessor/PropertyOrCollectionAccessorFacetAbstract.java
@@ -23,7 +23,6 @@ import java.util.Map;
 
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapterProvider;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facetapi.FacetAbstract;
@@ -38,7 +37,6 @@ implements PropertyOrCollectionAccessorFacet {
     private final ObjectSpecification onType;
     private final ObjectAdapterProvider adapterProvider;
     private final SpecificationLoader specificationLoader;
-    private final IsisConfiguration configuration;
     private final AuthenticationSessionProvider authenticationSessionProvider;
 
     public static Class<? extends Facet> type() {
@@ -48,7 +46,6 @@ implements PropertyOrCollectionAccessorFacet {
     public PropertyOrCollectionAccessorFacetAbstract(
             final ObjectSpecification onType,
             final FacetHolder holder,
-            final IsisConfiguration configuration,
             final SpecificationLoader specificationLoader,
             final AuthenticationSessionProvider authenticationSessionProvider,
             final ObjectAdapterProvider adapterProvider) {
@@ -56,7 +53,6 @@ implements PropertyOrCollectionAccessorFacet {
         this.onType = onType;
         this.adapterProvider = adapterProvider;
         this.specificationLoader = specificationLoader;
-        this.configuration = configuration;
         this.authenticationSessionProvider = authenticationSessionProvider;
     }
 
@@ -79,10 +75,6 @@ implements PropertyOrCollectionAccessorFacet {
         return specificationLoader;
     }
 
-    protected IsisConfiguration getConfiguration() {
-        return configuration;
-    }
-
     public AuthenticationSession getAuthenticationSession() {
         return authenticationSessionProvider.getAuthenticationSession();
     }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/accessor/PropertyAccessorFacetViaAccessor.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/accessor/PropertyAccessorFacetViaAccessor.java
index 3cb075c..dad5871 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/accessor/PropertyAccessorFacetViaAccessor.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/accessor/PropertyAccessorFacetViaAccessor.java
@@ -24,8 +24,8 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapterProvider;
 import org.apache.isis.core.metamodel.consent.InteractionInitiatedBy;
@@ -47,11 +47,10 @@ implements ImperativeFacet {
             final ObjectSpecification typeSpec,
             final Method method,
             final FacetHolder holder,
-            final IsisConfiguration isisConfiguration,
             final SpecificationLoader specificationLoader,
             final AuthenticationSessionProvider authenticationSessionProvider,
             final ObjectAdapterProvider adapterProvider) {
-        super(typeSpec, holder, isisConfiguration, specificationLoader, authenticationSessionProvider, adapterProvider);
+        super(typeSpec, holder, specificationLoader, authenticationSessionProvider, adapterProvider);
         this.method = method;
     }
 
@@ -79,7 +78,7 @@ implements ImperativeFacet {
             return null;
         }
 
-        boolean filterForVisibility = getConfiguration().getBoolean("isis.reflector.facet.filterVisibility", true);
+        boolean filterForVisibility = _Config.getConfiguration().getBoolean("isis.reflector.facet.filterVisibility", true);
         if(filterForVisibility) {
             final ObjectAdapter referencedAdapter = getObjectAdapterProvider().adapterFor(referencedObject);
             final boolean visible = ObjectAdapter.Util
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/accessor/PropertyAccessorFacetViaAccessorFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/accessor/PropertyAccessorFacetViaAccessorFactory.java
index 813a55c..1a8139a 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/accessor/PropertyAccessorFacetViaAccessorFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/accessor/PropertyAccessorFacetViaAccessorFactory.java
@@ -57,7 +57,6 @@ public class PropertyAccessorFacetViaAccessorFactory extends PropertyOrCollectio
         FacetUtil.addFacet(
                 new PropertyAccessorFacetViaAccessor(
                         typeSpec, accessorMethod, property,
-                        getConfiguration(),
                         getSpecificationLoader(),
                         getAuthenticationSessionProvider(),
                         adapterProvider
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/property/PropertyAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/property/PropertyAnnotationFacetFactory.java
index df84463..baadcb4 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/property/PropertyAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/facets/properties/property/PropertyAnnotationFacetFactory.java
@@ -28,7 +28,6 @@ import javax.validation.constraints.Pattern;
 import org.apache.isis.applib.annotation.Property;
 import org.apache.isis.applib.events.domain.PropertyDomainEvent;
 import org.apache.isis.applib.services.HasUniqueId;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
@@ -336,7 +335,7 @@ public class PropertyAnnotationFacetFactory extends FacetFactoryAbstract impleme
     // //////////////////////////////////////
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(conflictingOptionalityValidator);
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/FacetFactorySet.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/FacetFactorySet.java
index 448c5d2..7f34c46 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/FacetFactorySet.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/FacetFactorySet.java
@@ -23,6 +23,7 @@ import java.util.List;
 
 import org.apache.isis.core.commons.config.ConfigurationConstants;
 import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.commons.factory.InstanceUtil;
 import org.apache.isis.core.metamodel.facets.FacetFactory;
 import org.apache.isis.core.metamodel.specloader.ReflectorConstants;
@@ -64,8 +65,11 @@ public interface FacetFactorySet {
     class Util {
         private Util(){}
 
-        public static void includeFacetFactories(final IsisConfiguration configuration, final FacetFactorySet programmingModel) {
-            final String[] facetFactoriesIncludeClassNames = configuration.getList(ReflectorConstants.FACET_FACTORY_INCLUDE_CLASS_NAME_LIST);
+        public static void includeFacetFactories(
+                final IsisConfigurationBuilder configurationBuilder, 
+                final FacetFactorySet programmingModel) {
+            
+            final String[] facetFactoriesIncludeClassNames = configurationBuilder.peekAtList(ReflectorConstants.FACET_FACTORY_INCLUDE_CLASS_NAME_LIST);
             if (facetFactoriesIncludeClassNames != null) {
                 for (final String facetFactoryClassName : facetFactoriesIncludeClassNames) {
                     final Class<? extends FacetFactory> facetFactory = InstanceUtil.loadClass(facetFactoryClassName, FacetFactory.class);
@@ -74,12 +78,34 @@ public interface FacetFactorySet {
             }
         }
 
-        public static void excludeFacetFactories(final IsisConfiguration configuration, final FacetFactorySet programmingModel) {
-            final String[] facetFactoriesExcludeClassNames = configuration.getList(ReflectorConstants.FACET_FACTORY_EXCLUDE_CLASS_NAME_LIST);
+        public static void excludeFacetFactories(
+                final IsisConfigurationBuilder configurationBuilder, 
+                final FacetFactorySet programmingModel) {
+            
+            final String[] facetFactoriesExcludeClassNames = configurationBuilder.peekAtList(ReflectorConstants.FACET_FACTORY_EXCLUDE_CLASS_NAME_LIST);
             for (final String facetFactoryClassName : facetFactoriesExcludeClassNames) {
                 final Class<? extends FacetFactory> facetFactory = InstanceUtil.loadClass(facetFactoryClassName, FacetFactory.class);
                 programmingModel.removeFactory(facetFactory);
             }
         }
+        
+//        public static void includeFacetFactories(final IsisConfiguration configuration, final FacetFactorySet programmingModel) {
+//            final String[] facetFactoriesIncludeClassNames = configuration.getList(ReflectorConstants.FACET_FACTORY_INCLUDE_CLASS_NAME_LIST);
+//            if (facetFactoriesIncludeClassNames != null) {
+//                for (final String facetFactoryClassName : facetFactoriesIncludeClassNames) {
+//                    final Class<? extends FacetFactory> facetFactory = InstanceUtil.loadClass(facetFactoryClassName, FacetFactory.class);
+//                    programmingModel.addFactory(facetFactory);
+//                }
+//            }
+//        }
+//
+//        public static void excludeFacetFactories(final IsisConfiguration configuration, final FacetFactorySet programmingModel) {
+//            final String[] facetFactoriesExcludeClassNames = configuration.getList(ReflectorConstants.FACET_FACTORY_EXCLUDE_CLASS_NAME_LIST);
+//            for (final String facetFactoryClassName : facetFactoriesExcludeClassNames) {
+//                final Class<? extends FacetFactory> facetFactory = InstanceUtil.loadClass(facetFactoryClassName, FacetFactory.class);
+//                programmingModel.removeFactory(facetFactory);
+//            }
+//        }
+        
     }
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/ProgrammingModelAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/ProgrammingModelAbstract.java
index e8d96cf..d683117 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/ProgrammingModelAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/progmodel/ProgrammingModelAbstract.java
@@ -25,6 +25,7 @@ import java.util.List;
 
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.commons.factory.InstanceUtil;
 import org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner;
 import org.apache.isis.core.metamodel.facets.FacetFactory;
@@ -46,6 +47,12 @@ public abstract class ProgrammingModelAbstract implements ProgrammingModel {
             boolean ignoreDep = configuration.getBoolean(KEY_IGNORE_DEPRECATED, false);
             return ignoreDep ? IGNORE : HONOUR;
         }
+        
+        public static DeprecatedPolicy parse(final IsisConfigurationBuilder configuration) {
+            boolean ignoreDep = configuration.peekAtBoolean(KEY_IGNORE_DEPRECATED, false);
+            return ignoreDep ? IGNORE : HONOUR;
+        }
+        
     }
 
     protected final DeprecatedPolicy deprecatedPolicy;
@@ -153,11 +160,11 @@ public abstract class ProgrammingModelAbstract implements ProgrammingModel {
     }
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, final IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
         for (final FacetFactory facetFactory : getList()) {
             if(facetFactory instanceof MetaModelValidatorRefiner) {
                 final MetaModelValidatorRefiner metaModelValidatorRefiner = (MetaModelValidatorRefiner) facetFactory;
-                metaModelValidatorRefiner.refineMetaModelValidator(metaModelValidator, configuration);
+                metaModelValidatorRefiner.refineMetaModelValidator(metaModelValidator);
             }
         }
     }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjector.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjector.java
index 94dabc7..4fcbe09 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjector.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjector.java
@@ -43,11 +43,9 @@ import org.apache.isis.commons.internal.collections._Multimaps;
 import org.apache.isis.commons.internal.collections._Multimaps.ListMultimap;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
 import org.apache.isis.core.commons.components.ApplicationScopedComponent;
-import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.commons.util.ToString;
 import org.apache.isis.core.metamodel.exceptions.MetaModelException;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
 import org.apache.isis.core.metamodel.spec.InjectorMethodEvaluator;
 import org.apache.isis.core.metamodel.specloader.InjectorMethodEvaluatorDefault;
@@ -71,10 +69,9 @@ public class ServicesInjector implements ApplicationScopedComponent, ServiceRegi
 
     private static final Logger LOG = LoggerFactory.getLogger(ServicesInjector.class);
 
-    public static final String KEY_SET_PREFIX = "isis.services.injector.setPrefix";
-    public static final String KEY_INJECT_PREFIX = "isis.services.injector.injectPrefix";
+    private static final String KEY_SET_PREFIX = "isis.services.injector.setPrefix";
+    private static final String KEY_INJECT_PREFIX = "isis.services.injector.injectPrefix";
 
-    // -- CONSTRUCTOR, FIELDS
     /**
      * This is mutable internally, but only ever exposed (in {@link #streamRegisteredServices()}).
      */
@@ -93,37 +90,42 @@ public class ServicesInjector implements ApplicationScopedComponent, ServiceRegi
     private final boolean autowireSetters;
     private final boolean autowireInject;
 
-    public ServicesInjector(final List<Object> services, final IsisConfiguration configuration) {
-        this(services, null, configuration);
+    // -- BUILDER
+    
+    public static ServicesInjectorBuilder builder() {
+        return new ServicesInjectorBuilder();
     }
-
-    public static ServicesInjector forTesting(
-            final List<Object> services,
-            final IsisConfigurationDefault configuration,
-            final InjectorMethodEvaluator injectorMethodEvaluator) {
-        return new ServicesInjector(services, injectorMethodEvaluator, defaultAutowiring(configuration));
+    
+    public static ServicesInjectorBuilder builderOf(IsisConfigurationBuilder configBuilder) {
+        return builder()
+                .autowireSetters(configBuilder.peekAtBoolean(KEY_SET_PREFIX, true))
+                .autowireInject(configBuilder.peekAtBoolean(KEY_INJECT_PREFIX, true));
     }
-
-    private static IsisConfiguration defaultAutowiring(final IsisConfigurationDefault configuration) {
-        configuration.put(KEY_SET_PREFIX, ""+true);
-        configuration.put(KEY_INJECT_PREFIX, ""+false);
-        return configuration;
+    
+    public static ServicesInjectorBuilder builderForTesting() {
+        return builder()
+                .autowireSetters(true)
+                .autowireInject(false);
     }
+    
+    // -- CONSTRUCTOR (NOT EXPOSED)
 
-    private ServicesInjector(
+    ServicesInjector(
             final List<Object> services,
             final InjectorMethodEvaluator injectorMethodEvaluator,
-            final IsisConfiguration configuration) {
+            final boolean autowireSetters,
+            final boolean autowireInject
+            ) {
         
-        this.services = new ArrayList<>(services);//_Lists.unmodifiable(services);
+        this.services = new ArrayList<>(services);
 
         this.injectorMethodEvaluator =
                 injectorMethodEvaluator != null
                 ? injectorMethodEvaluator
                         : new InjectorMethodEvaluatorDefault();
 
-        this.autowireSetters = configuration.getBoolean(KEY_SET_PREFIX, true);
-        this.autowireInject = configuration.getBoolean(KEY_INJECT_PREFIX, false);
+        this.autowireSetters = autowireSetters;
+        this.autowireInject = autowireInject;
     }
 
     public boolean isRegisteredService(final Class<?> cls) {
@@ -485,12 +487,13 @@ public class ServicesInjector implements ApplicationScopedComponent, ServiceRegi
                         : (persistenceSessionServiceInternal = lookupServiceElseFail(PersistenceSessionServiceInternal.class));
     }
 
-    private ConfigurationServiceInternal configurationServiceInternal;
-    @Programmatic
-    public ConfigurationServiceInternal getConfigurationServiceInternal() {
-        return configurationServiceInternal != null
-                ? configurationServiceInternal
-                        : (configurationServiceInternal = lookupServiceElseFail(ConfigurationServiceInternal.class));
-    }
+//TODO[2039]    
+//    private ConfigurationServiceInternal configurationServiceInternal;
+//    @Programmatic
+//    public ConfigurationServiceInternal getConfigurationServiceInternal() {
+//        return configurationServiceInternal != null
+//                ? configurationServiceInternal
+//                        : (configurationServiceInternal = lookupServiceElseFail(ConfigurationServiceInternal.class));
+//    }
 
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjectorBuilder.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjectorBuilder.java
new file mode 100644
index 0000000..1990caa
--- /dev/null
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/ServicesInjectorBuilder.java
@@ -0,0 +1,90 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.apache.isis.core.metamodel.services;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
+import org.apache.isis.core.metamodel.spec.InjectorMethodEvaluator;
+import org.apache.isis.core.metamodel.specloader.InjectorMethodEvaluatorDefault;
+
+import static org.apache.isis.commons.internal.base._With.computeIfAbsent;
+
+public class ServicesInjectorBuilder {
+
+    private final List<Object> services = new ArrayList<>();
+    private IsisConfigurationBuilder configBuilder;
+    private InjectorMethodEvaluator injectorMethodEvaluator;
+    private boolean autowireSetters = false; 
+    private boolean autowireInject = false;
+    
+    public ServicesInjectorBuilder addService(Object service) {
+        services.add(service);
+        return this;
+    }
+    
+    public ServicesInjectorBuilder addServices(List<Object> services) {
+        this.services.addAll(services);
+        return this;
+    }
+    
+    public ServicesInjectorBuilder configBuilder(IsisConfigurationBuilder configBuilder) {
+        this.configBuilder = configBuilder;
+        return this;
+    }
+    
+    public ServicesInjectorBuilder injectorMethodEvaluator(InjectorMethodEvaluator injectorMethodEvaluator) {
+        this.injectorMethodEvaluator = injectorMethodEvaluator;
+        return this;
+    }
+    
+    public ServicesInjectorBuilder autowireSetters(boolean autowireSetters) {
+        this.autowireSetters = autowireSetters;
+        return this;
+    }
+    
+    public ServicesInjectorBuilder autowireInject(boolean autowireInject) {
+        this.autowireInject = autowireInject;
+        return this;
+    }
+    
+    // -- BUILD
+    
+    public ServicesInjector build() {
+        return new ServicesInjector(
+                new ArrayList<>(services), 
+//              computeIfAbsent(configBuilder, this::defaultConfigBuilder), 
+                computeIfAbsent(injectorMethodEvaluator, this::defaultInjectorMethodEvaluatorDefault),
+                autowireSetters,
+                autowireInject
+                );
+    }
+    
+    // -- HELPER
+    
+    private IsisConfigurationBuilder defaultConfigBuilder() {
+        return new IsisConfigurationBuilder();
+    }
+    
+    private InjectorMethodEvaluator defaultInjectorMethodEvaluatorDefault() {
+        return new InjectorMethodEvaluatorDefault();
+    }
+
+
+    
+}
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/config/ConfigurationServiceDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/config/ConfigurationServiceDefault.java
deleted file mode 100644
index 5f28e8a..0000000
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/config/ConfigurationServiceDefault.java
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
- *  Licensed to the Apache Software Foundation (ASF) under one
- *  or more contributor license agreements.  See the NOTICE file
- *  distributed with this work for additional information
- *  regarding copyright ownership.  The ASF licenses this file
- *  to you under the Apache License, Version 2.0 (the
- *  "License"); you may not use this file except in compliance
- *  with the License.  You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing,
- *  software distributed under the License is distributed on an
- *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- *  KIND, either express or implied.  See the License for the
- *  specific language governing permissions and limitations
- *  under the License.
- */
-
-package org.apache.isis.core.metamodel.services.config;
-
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
-import java.util.Set;
-import java.util.SortedSet;
-import java.util.TreeSet;
-
-import javax.annotation.PostConstruct;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import org.apache.isis.applib.annotation.DomainService;
-import org.apache.isis.applib.annotation.NatureOfService;
-import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.applib.services.config.ConfigurationProperty;
-import org.apache.isis.applib.services.config.ConfigurationService;
-import org.apache.isis.commons.internal.collections._Lists;
-import org.apache.isis.commons.internal.collections._Maps;
-import org.apache.isis.commons.internal.collections._Sets;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
-
-/**
- * This is the implementation of the applib's {@link ConfigurationService}, different from the internal
- * {@link ConfigurationServiceInternal} domain service (implemented by {@link IsisConfigurationDefault}).
- *
- * TODO: unify these two type hierarchies...
- */
-@DomainService(
-        nature = NatureOfService.DOMAIN,
-        menuOrder = "" + Integer.MAX_VALUE
-        )
-public class ConfigurationServiceDefault implements ConfigurationService {
-
-    private final Logger LOG = LoggerFactory.getLogger(ConfigurationServiceDefault.class);
-
-    private final Map<String, String> properties = _Maps.newHashMap();
-
-    @Programmatic
-    @PostConstruct
-    public void init(final Map<String,String> properties) {
-        Objects.requireNonNull(properties);
-        Objects.requireNonNull(configurationServiceInternal);
-
-        // [ahuber] not sure which of the two to has precedence ...
-        final Map<String, String> a = properties;
-        final Map<String, String> b = configurationServiceInternal.asMap();
-
-        // ... so we report if there is a clash in configured values
-        {
-            Set<String> potentialClashKeys = _Sets.intersect(a.keySet(), b.keySet());
-
-            long clashCount = potentialClashKeys.stream()
-                    .filter(key->{
-                        if(!Objects.equals(a.get(key), b.get(key))){
-
-                            LOG.warn(String.format("config value clash, having two versions for key '%s': '%s' <--> '%s'",
-                                    key, ""+a.get(key), ""+b.get(key)	));
-
-                            return true;
-                        }
-                        return false;
-                    })
-                    .count();
-
-            if(clashCount>0) {
-                LOG.error("===================================================================");
-                LOG.error(" config clashes detected, likely a framework bug");
-                LOG.error("===================================================================");
-            }
-
-        }
-
-        this.properties.putAll(a);
-        this.properties.putAll(b);
-
-
-    }
-
-    @Programmatic
-    @Override
-    public SortedSet<ConfigurationProperty> allProperties() {
-        final SortedSet<ConfigurationProperty> kv = new TreeSet<>();
-
-        properties.entrySet().stream()
-        .map(this::toConfigurationProperty)
-        .forEach(kv::add);
-
-        return java.util.Collections.unmodifiableSortedSet(kv);
-    }
-
-    @Programmatic
-    @Override
-    public String getProperty(final String name) {
-        return properties.get(name);
-    }
-
-    @Programmatic
-    @Override
-    public String getProperty(final String name, final String defaultValue) {
-        final String value = getProperty(name);
-        return value == null ? defaultValue : value;
-    }
-
-    @Programmatic
-    @Override
-    public List<String> getPropertyNames() {
-        return _Lists.unmodifiable(properties.keySet());
-    }
-
-    @javax.inject.Inject
-    ConfigurationServiceInternal configurationServiceInternal;
-
-    // -- HELPER
-
-    private ConfigurationProperty toConfigurationProperty(Map.Entry<String, String> entry) {
-        return new ConfigurationProperty(entry.getKey(), entry.getValue());
-    }
-
-}
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/configinternal/ConfigurationServiceInternal.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/configinternal/ConfigurationServiceInternal.java
deleted file mode 100644
index 499c07e..0000000
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/services/configinternal/ConfigurationServiceInternal.java
+++ /dev/null
@@ -1,32 +0,0 @@
-/**
- *  Licensed to the Apache Software Foundation (ASF) under one or more
- *  contributor license agreements.  See the NOTICE file distributed with
- *  this work for additional information regarding copyright ownership.
- *  The ASF licenses this file to You under the Apache License, Version 2.0
- *  (the "License"); you may not use this file except in compliance with
- *  the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-package org.apache.isis.core.metamodel.services.configinternal;
-
-import java.util.List;
-
-import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.core.commons.config.IsisConfiguration;
-
-public interface ConfigurationServiceInternal extends IsisConfiguration {
-
-    @Programmatic
-    String getProperty(String name);
-
-    @Programmatic
-    List<String> getPropertyNames();
-
-}
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/SpecificationLoader.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/SpecificationLoader.java
index 878f3eb..e936438 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/SpecificationLoader.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/SpecificationLoader.java
@@ -31,6 +31,7 @@ import org.apache.isis.applib.annotation.DomainService;
 import org.apache.isis.applib.annotation.NatureOfService;
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.components.ApplicationScopedComponent;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.ensure.Assert;
@@ -42,7 +43,6 @@ import org.apache.isis.core.metamodel.facets.object.autocomplete.AutoCompleteFac
 import org.apache.isis.core.metamodel.facets.object.objectspecid.ObjectSpecIdFacet;
 import org.apache.isis.core.metamodel.progmodel.ProgrammingModel;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.apache.isis.core.metamodel.spec.FreeStandingList;
 import org.apache.isis.core.metamodel.spec.ObjectSpecId;
 import org.apache.isis.core.metamodel.spec.ObjectSpecification;
@@ -95,7 +95,6 @@ public class SpecificationLoader implements ApplicationScopedComponent {
     private final ProgrammingModel programmingModel;
     private final FacetProcessor facetProcessor;
 
-    private final IsisConfiguration configuration;
     private final ServicesInjector servicesInjector;
 
     private final MetaModelValidator metaModelValidator;
@@ -110,13 +109,10 @@ public class SpecificationLoader implements ApplicationScopedComponent {
 
 
     public SpecificationLoader(
-            final IsisConfiguration configuration,
             final ProgrammingModel programmingModel,
             final MetaModelValidator metaModelValidator,
             final ServicesInjector servicesInjector) {
 
-        this.configuration = configuration;
-
         this.servicesInjector = servicesInjector;
         this.programmingModel = programmingModel;
         this.metaModelValidator = metaModelValidator;
@@ -217,8 +213,8 @@ public class SpecificationLoader implements ApplicationScopedComponent {
             callables.add(callable);
         }
         ThreadPoolSupport threadPoolSupport = ThreadPoolSupport.getInstance();
-        final boolean parallelize =
-                configuration.getBoolean(INTROSPECTOR_PARALLELIZE_KEY, INTROSPECTOR_PARALLELIZE_DEFAULT);
+        final boolean parallelize = _Config.getConfiguration()
+                .getBoolean(INTROSPECTOR_PARALLELIZE_KEY, INTROSPECTOR_PARALLELIZE_DEFAULT);
         List<Future<Object>> futures;
         if(parallelize) {
             futures = threadPoolSupport.invokeAll(callables);
@@ -481,11 +477,10 @@ public class SpecificationLoader implements ApplicationScopedComponent {
         if (FreeStandingList.class.isAssignableFrom(cls)) {
             return new ObjectSpecificationOnStandaloneList(servicesInjector, facetProcessor);
         } else {
-            final ConfigurationServiceInternal configService = servicesInjector.lookupServiceElseFail(
-                    ConfigurationServiceInternal.class);
+
             final FacetedMethodsBuilderContext facetedMethodsBuilderContext =
                     new FacetedMethodsBuilderContext(
-                            this, facetProcessor, configService);
+                            this, facetProcessor);
 
             final NatureOfService natureOfServiceIfAny = natureOfServiceFrom(cls, fallback);
 
@@ -629,7 +624,7 @@ public class SpecificationLoader implements ApplicationScopedComponent {
 
     @Programmatic
     public IsisConfiguration getConfiguration() {
-        return configuration;
+        return _Config.getConfiguration();
     }
 
     @Programmatic
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/FacetedMethodsBuilder.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/FacetedMethodsBuilder.java
index 3ab637e..fcc983a 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/FacetedMethodsBuilder.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/FacetedMethodsBuilder.java
@@ -32,6 +32,7 @@ import org.slf4j.LoggerFactory;
 
 import org.apache.isis.applib.annotation.Action;
 import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.exceptions.IsisException;
 import org.apache.isis.core.commons.lang.ListExtensions;
 import org.apache.isis.core.commons.lang.MethodUtil;
@@ -160,8 +161,7 @@ public class FacetedMethodsBuilder {
         this.facetProcessor = facetedMethodsBuilderContext.facetProcessor;
         this.specificationLoader = facetedMethodsBuilderContext.specificationLoader;
 
-        this.explicitAnnotationsForActions = facetedMethodsBuilderContext.configService.getBoolean("isis.reflector.explicitAnnotations.action");
-
+        this.explicitAnnotationsForActions = _Config.getConfiguration().explicitAnnotationsForActions();
     }
 
     // ////////////////////////////////////////////////////////////////////////////
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/FacetedMethodsBuilderContext.java b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/FacetedMethodsBuilderContext.java
index 8326a88..e4681db 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/FacetedMethodsBuilderContext.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/metamodel/specloader/specimpl/FacetedMethodsBuilderContext.java
@@ -16,21 +16,17 @@
  */
 package org.apache.isis.core.metamodel.specloader.specimpl;
 
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
 import org.apache.isis.core.metamodel.specloader.facetprocessor.FacetProcessor;
 
 public class FacetedMethodsBuilderContext {
     public final SpecificationLoader specificationLoader;
     public final FacetProcessor facetProcessor;
-    public final ConfigurationServiceInternal configService;
 
     public FacetedMethodsBuilderContext(
             final SpecificationLoader specificationLoader,
-            final FacetProcessor facetProcessor,
-            final ConfigurationServiceInternal configService) {
+            final FacetProcessor facetProcessor) {
         this.specificationLoader = specificationLoader;
         this.facetProcessor = facetProcessor;
-        this.configService = configService;
     }
 }
\ No newline at end of file
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/fixture/LogonFixtureAuthenticator.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/fixture/LogonFixtureAuthenticator.java
index 57c7c9c..ba7bd6d 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/fixture/LogonFixtureAuthenticator.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/fixture/LogonFixtureAuthenticator.java
@@ -20,15 +20,14 @@
 package org.apache.isis.core.runtime.authentication.fixture;
 
 import org.apache.isis.commons.internal.context._Context;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
 import org.apache.isis.core.runtime.authentication.standard.AuthenticatorAbstract;
 import org.apache.isis.core.runtime.fixtures.authentication.AuthenticationRequestLogonFixture;
 
 public class LogonFixtureAuthenticator extends AuthenticatorAbstract {
 
-    public LogonFixtureAuthenticator(final IsisConfiguration configuration) {
-        super(configuration);
+    public LogonFixtureAuthenticator() {
+        super();
     }
 
     /**
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticationManagerStandard.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticationManagerStandard.java
index 86bb2ea..69b273a 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticationManagerStandard.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticationManagerStandard.java
@@ -28,6 +28,7 @@ import java.util.stream.Collectors;
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.exceptions.IsisException;
@@ -45,11 +46,7 @@ public class AuthenticationManagerStandard implements AuthenticationManager {
     private final List<Authenticator> authenticators = _Lists.newArrayList();
 
     private RandomCodeGenerator randomCodeGenerator;
-    private final IsisConfiguration configuration;
-
-    public AuthenticationManagerStandard(final IsisConfiguration configuration) {
-        this.configuration = configuration;
-    }
+    
 
     // //////////////////////////////////////////////////////////
     // init
@@ -232,7 +229,7 @@ public class AuthenticationManagerStandard implements AuthenticationManager {
     // //////////////////////////////////////////////////////////
 
     protected IsisConfiguration getConfiguration() {
-        return configuration;
+        return _Config.getConfiguration();
     }
 
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticationManagerStandardInstallerAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticationManagerStandardInstallerAbstract.java
index 34c16df..5650cf4 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticationManagerStandardInstallerAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticationManagerStandardInstallerAbstract.java
@@ -22,16 +22,13 @@ package org.apache.isis.core.runtime.authentication.standard;
 import java.util.List;
 
 import org.apache.isis.core.commons.components.InstallerAbstract;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationManager;
 import org.apache.isis.core.runtime.authentication.AuthenticationManagerInstaller;
 
 public abstract class AuthenticationManagerStandardInstallerAbstract extends InstallerAbstract implements AuthenticationManagerInstaller {
 
-    public AuthenticationManagerStandardInstallerAbstract(
-            final String name,
-            final IsisConfiguration isisConfiguration) {
-        super(name, isisConfiguration);
+    public AuthenticationManagerStandardInstallerAbstract(final String name) {
+        super(name);
     }
 
     @Override
@@ -44,7 +41,7 @@ public abstract class AuthenticationManagerStandardInstallerAbstract extends Ins
     }
 
     protected AuthenticationManagerStandard createAuthenticationManagerStandard() {
-        return new AuthenticationManagerStandard(getConfiguration());
+        return new AuthenticationManagerStandard();
     }
 
     /**
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorAbstract.java
index 0c7b02e..e1f6bde 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorAbstract.java
@@ -20,18 +20,10 @@
 package org.apache.isis.core.runtime.authentication.standard;
 
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
 
 public abstract class AuthenticatorAbstract implements Authenticator {
 
-    // -- constructor, fields
-    private final IsisConfiguration configuration;
-
-    public AuthenticatorAbstract(final IsisConfiguration configuration) {
-        this.configuration = configuration;
-    }
-
     // -- init, shutdown
 
     @Override
@@ -71,12 +63,4 @@ public abstract class AuthenticatorAbstract implements Authenticator {
     }
 
 
-    // -- Injected (via constructor)
-
-    public IsisConfiguration getConfiguration() {
-        return configuration;
-    }
-
-
-
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorDefault.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorDefault.java
index 3804e7e..e71fdb9 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorDefault.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorDefault.java
@@ -19,13 +19,10 @@
 
 package org.apache.isis.core.runtime.authentication.standard;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
-
 public abstract class AuthenticatorDefault extends AuthenticatorAbstract {
 
-    public AuthenticatorDefault(final IsisConfiguration configuration) {
-        super(configuration);
+    public AuthenticatorDefault() {
+        super();
     }
 
-
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/PasswordRequestAuthenticatorAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/PasswordRequestAuthenticatorAbstract.java
index d6987dc..8b200a3 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/PasswordRequestAuthenticatorAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authentication/standard/PasswordRequestAuthenticatorAbstract.java
@@ -19,14 +19,13 @@
 
 package org.apache.isis.core.runtime.authentication.standard;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequestPassword;
 
 public abstract class PasswordRequestAuthenticatorAbstract extends AuthenticatorAbstract {
 
-    public PasswordRequestAuthenticatorAbstract(final IsisConfiguration configuration) {
-        super(configuration);
+    public PasswordRequestAuthenticatorAbstract() {
+        super();
     }
 
     @Override
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/AuthorizationManagerAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/AuthorizationManagerAbstract.java
index bc94643..bec08db 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/AuthorizationManagerAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/AuthorizationManagerAbstract.java
@@ -19,25 +19,9 @@
 
 package org.apache.isis.core.runtime.authorization;
 
-import org.apache.isis.applib.annotation.Programmatic;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.MetaModelRefiner;
 
 public abstract class AuthorizationManagerAbstract implements AuthorizationManager, MetaModelRefiner {
 
-    private final IsisConfiguration configuration;
-
-    // /////////////////////////////////////////////////////////
-    // Constructor
-    // /////////////////////////////////////////////////////////
-
-    public AuthorizationManagerAbstract(final IsisConfiguration configuration) {
-        this.configuration = configuration;
-    }
-
-    @Programmatic
-    public IsisConfiguration getConfiguration() {
-        return configuration;
-    }
 
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/AuthorizationManagerStandard.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/AuthorizationManagerStandard.java
index c6444e6..7dbad8e 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/AuthorizationManagerStandard.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/AuthorizationManagerStandard.java
@@ -24,7 +24,6 @@ import java.util.List;
 import org.apache.isis.applib.Identifier;
 import org.apache.isis.applib.services.sudo.SudoService;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.progmodel.ProgrammingModel;
 import org.apache.isis.core.metamodel.spec.ManagedObject;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorComposite;
@@ -38,39 +37,10 @@ public class AuthorizationManagerStandard extends AuthorizationManagerAbstract {
     // Constructor
     // /////////////////////////////////////////////////////////
 
-    public AuthorizationManagerStandard(final IsisConfiguration configuration) {
-        super(configuration);
+    public AuthorizationManagerStandard() {
+        super();
         // avoid null pointers
-        authorizor = new Authorizor() {
-
-            @Override
-            public void init() {
-            }
-
-            @Override
-            public void shutdown() {
-            }
-
-            @Override
-            public boolean isVisibleInRole(final String user, final Identifier identifier) {
-                return true;
-            }
-
-            @Override
-            public boolean isUsableInRole(final String role, final Identifier identifier) {
-                return true;
-            }
-
-            @Override
-            public boolean isVisibleInAnyRole(Identifier identifier) {
-                return true;
-            }
-
-            @Override
-            public boolean isUsableInAnyRole(Identifier identifier) {
-                return true;
-            }
-        };
+        authorizor = Authorizor.nop();
     }
 
     // /////////////////////////////////////////////////////////
@@ -150,12 +120,12 @@ public class AuthorizationManagerStandard extends AuthorizationManagerAbstract {
     // //////////////////////////////////////////////////
 
     @Override
-    public void refineMetaModelValidator(MetaModelValidatorComposite baseMetaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(MetaModelValidatorComposite baseMetaModelValidator) {
         // no-op
     }
 
     @Override
-    public void refineProgrammingModel(ProgrammingModel baseProgrammingModel, IsisConfiguration configuration) {
+    public void refineProgrammingModel(ProgrammingModel baseProgrammingModel) {
         final AuthorizationFacetFactory facetFactory = new AuthorizationFacetFactory(this);
         baseProgrammingModel.addFactory(facetFactory);
     }
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/AuthorizationManagerStandardInstallerAbstract.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/AuthorizationManagerStandardInstallerAbstract.java
index 449e242..b4a2416 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/AuthorizationManagerStandardInstallerAbstract.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/AuthorizationManagerStandardInstallerAbstract.java
@@ -22,7 +22,6 @@ package org.apache.isis.core.runtime.authorization.standard;
 import java.util.List;
 
 import org.apache.isis.core.commons.components.InstallerAbstract;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.runtime.authorization.AuthorizationManager;
 import org.apache.isis.core.runtime.authorization.AuthorizationManagerInstaller;
 
@@ -30,15 +29,13 @@ public abstract class AuthorizationManagerStandardInstallerAbstract
 extends InstallerAbstract
 implements AuthorizationManagerInstaller {
 
-    public AuthorizationManagerStandardInstallerAbstract(
-            final String name,
-            final IsisConfigurationDefault isisConfiguration) {
-        super(name, isisConfiguration);
+    public AuthorizationManagerStandardInstallerAbstract(final String name) {
+        super(name);
     }
 
     @Override
     public AuthorizationManager createAuthorizationManager() {
-        final AuthorizationManagerStandard authorizationManager = new AuthorizationManagerStandard(getConfiguration());
+        final AuthorizationManagerStandard authorizationManager = new AuthorizationManagerStandard();
         final Authorizor authorizor = createAuthorizor();
         authorizationManager.setAuthorizor(authorizor);
         return authorizationManager;
diff --git a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/Authorizor.java b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/Authorizor.java
index d78fb36..2d7f463 100644
--- a/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/Authorizor.java
+++ b/core/metamodel/src/main/java/org/apache/isis/core/runtime/authorization/standard/Authorizor.java
@@ -40,5 +40,41 @@ public interface Authorizor extends ApplicationScopedComponent {
      */
     boolean isUsableInRole(final String role, final Identifier identifier);
 
+    // -- NOP IMPLEMENTATIOn 
+    
+    final static Authorizor NOP = new Authorizor() {
+
+        @Override
+        public void init() {
+        }
+
+        @Override
+        public void shutdown() {
+        }
+
+        @Override
+        public boolean isVisibleInRole(final String user, final Identifier identifier) {
+            return true;
+        }
+
+        @Override
+        public boolean isUsableInRole(final String role, final Identifier identifier) {
+            return true;
+        }
+
+        @Override
+        public boolean isVisibleInAnyRole(Identifier identifier) {
+            return true;
+        }
+
+        @Override
+        public boolean isUsableInAnyRole(Identifier identifier) {
+            return true;
+        }
+    };
+    
+    public static Authorizor nop() {
+        return NOP;
+    }
 
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/object/query/JdoQueryAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/object/query/JdoQueryAnnotationFacetFactory.java
index 677d78d..49d03e2 100644
--- a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/object/query/JdoQueryAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/object/query/JdoQueryAnnotationFacetFactory.java
@@ -24,6 +24,7 @@ import java.util.regex.Pattern;
 import javax.jdo.annotations.Queries;
 import javax.jdo.annotations.Query;
 
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.JdoMetamodelUtil;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
@@ -76,9 +77,9 @@ public class JdoQueryAnnotationFacetFactory extends FacetFactoryAbstract impleme
 
     @Override
     public void refineMetaModelValidator(
-            final MetaModelValidatorComposite metaModelValidator,
-            final IsisConfiguration configuration) {
+            final MetaModelValidatorComposite metaModelValidator) {
 
+        final IsisConfiguration configuration = _Config.getConfiguration();
         final boolean validateFromClause = configuration.getBoolean(
                 ISIS_REFLECTOR_VALIDATOR_JDOQL_FROM_CLAUSE_KEY,
                 ISIS_REFLECTOR_VALIDATOR_JDOQL_FROM_CLAUSE_DEFAULT);
diff --git a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/object/version/JdoVersionAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/object/version/JdoVersionAnnotationFacetFactory.java
index 30e66cc..6cb8e6d 100644
--- a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/object/version/JdoVersionAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/object/version/JdoVersionAnnotationFacetFactory.java
@@ -59,7 +59,7 @@ public class JdoVersionAnnotationFacetFactory extends FacetFactoryAbstract imple
 
 
     @Override
-    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(final MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(newValidatorVisitor()));
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/BigDecimalDerivedFromJdoColumnAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/BigDecimalDerivedFromJdoColumnAnnotationFacetFactory.java
index dcedf5c..33cca16 100644
--- a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/BigDecimalDerivedFromJdoColumnAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/BigDecimalDerivedFromJdoColumnAnnotationFacetFactory.java
@@ -25,7 +25,6 @@ import java.util.stream.Stream;
 import javax.jdo.annotations.Column;
 import javax.jdo.annotations.IdentityType;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner;
@@ -105,7 +104,7 @@ public class BigDecimalDerivedFromJdoColumnAnnotationFacetFactory extends FacetF
 
 
     @Override
-    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(newValidatorVisitor()));
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/MandatoryFromJdoColumnAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/MandatoryFromJdoColumnAnnotationFacetFactory.java
index ce28259..35dda83 100644
--- a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/MandatoryFromJdoColumnAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/MandatoryFromJdoColumnAnnotationFacetFactory.java
@@ -25,7 +25,6 @@ import javax.jdo.annotations.Column;
 import javax.jdo.annotations.IdentityType;
 
 import org.apache.isis.commons.internal.base._Strings;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.JdoMetamodelUtil;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
@@ -114,7 +113,7 @@ public class MandatoryFromJdoColumnAnnotationFacetFactory extends FacetFactoryAb
     }
 
     @Override
-    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(newValidatorVisitor()));
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/MaxLengthDerivedFromJdoColumnAnnotationFacetFactory.java b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/MaxLengthDerivedFromJdoColumnAnnotationFacetFactory.java
index 879b571..9923018 100644
--- a/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/MaxLengthDerivedFromJdoColumnAnnotationFacetFactory.java
+++ b/core/metamodel/src/main/java/org/apache/isis/objectstore/jdo/metamodel/facets/prop/column/MaxLengthDerivedFromJdoColumnAnnotationFacetFactory.java
@@ -24,7 +24,6 @@ import java.util.stream.Stream;
 import javax.jdo.annotations.Column;
 import javax.jdo.annotations.IdentityType;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.JdoMetamodelUtil;
 import org.apache.isis.core.metamodel.facetapi.FacetUtil;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
@@ -93,7 +92,7 @@ public class MaxLengthDerivedFromJdoColumnAnnotationFacetFactory extends FacetFa
      * @see org.apache.isis.core.metamodel.facetapi.MetaModelValidatorRefiner#refineMetaModelValidator(org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorComposite, org.apache.isis.core.commons.config.IsisConfiguration)
      */
     @Override
-    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator, IsisConfiguration configuration) {
+    public void refineMetaModelValidator(MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new MetaModelValidatorVisiting(newValidatorVisitor()));
     }
 
diff --git a/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/JavaReflectorHelper.java b/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/JavaReflectorHelper.java
index 5f9a5e7..c60379f 100644
--- a/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/JavaReflectorHelper.java
+++ b/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/JavaReflectorHelper.java
@@ -21,10 +21,6 @@ package org.apache.isis.progmodels.dflt;
 
 import java.util.Collection;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.MetaModelRefiner;
 import org.apache.isis.core.metamodel.progmodel.ProgrammingModel;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
@@ -33,14 +29,12 @@ import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidator;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorComposite;
 
 public final class JavaReflectorHelper  {
-
-    @SuppressWarnings("unused")
-    private static final Logger LOG = LoggerFactory.getLogger(JavaReflectorHelper.class);
+    
+    //private static final Logger LOG = LoggerFactory.getLogger(JavaReflectorHelper.class);
 
     private JavaReflectorHelper(){}
 
     public static SpecificationLoader createObjectReflector(
-            final IsisConfiguration configuration,
             final ProgrammingModel programmingModel,
             final Collection<MetaModelRefiner> metaModelRefiners,
             final MetaModelValidator mmv,
@@ -48,13 +42,13 @@ public final class JavaReflectorHelper  {
 
         MetaModelValidatorComposite metaModelValidator = MetaModelValidatorComposite.asComposite(mmv);
         for (MetaModelRefiner metaModelRefiner : metaModelRefiners) {
-            metaModelRefiner.refineProgrammingModel(programmingModel, configuration);
-            metaModelRefiner.refineMetaModelValidator(metaModelValidator, configuration);
+            metaModelRefiner.refineProgrammingModel(programmingModel);
+            metaModelRefiner.refineMetaModelValidator(metaModelValidator);
         }
 
-        programmingModel.refineMetaModelValidator(metaModelValidator, configuration);
+        programmingModel.refineMetaModelValidator(metaModelValidator);
 
-        return new SpecificationLoader(configuration, programmingModel, metaModelValidator, servicesInjector);
+        return new SpecificationLoader(programmingModel, metaModelValidator, servicesInjector);
     }
 
 }
diff --git a/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/ProgrammingModelFacetsJava5.java b/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/ProgrammingModelFacetsJava5.java
index ec1c49a..880396c 100644
--- a/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/ProgrammingModelFacetsJava5.java
+++ b/core/metamodel/src/main/java/org/apache/isis/progmodels/dflt/ProgrammingModelFacetsJava5.java
@@ -22,7 +22,6 @@ import java.util.Set;
 
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.commons.internal.context._Plugin;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facets.actions.action.ActionAnnotationFacetFactory;
 import org.apache.isis.core.metamodel.facets.actions.action.ActionChoicesForCollectionParameterFacetFactory;
 import org.apache.isis.core.metamodel.facets.actions.defaults.method.ActionDefaultsFacetViaMethodFactory;
@@ -158,10 +157,6 @@ import org.apache.isis.core.metamodel.progmodel.ProgrammingModelPlugin.FactoryCo
 
 public final class ProgrammingModelFacetsJava5 extends ProgrammingModelAbstract {
 
-    public ProgrammingModelFacetsJava5(final IsisConfiguration configuration) {
-        this(DeprecatedPolicy.parse(configuration));
-    }
-
     public ProgrammingModelFacetsJava5(final DeprecatedPolicy deprecatedPolicy) {
         super(deprecatedPolicy);
 
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/AbstractFacetFactoryJUnit4TestCase.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/AbstractFacetFactoryJUnit4TestCase.java
index 7325039..f764fbc 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/AbstractFacetFactoryJUnit4TestCase.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/AbstractFacetFactoryJUnit4TestCase.java
@@ -31,8 +31,10 @@ import org.junit.Rule;
 
 import org.apache.isis.applib.Identifier;
 import org.apache.isis.applib.services.i18n.TranslationService;
+import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
 import org.apache.isis.core.metamodel.facetapi.IdentifiedHolder;
@@ -67,9 +69,6 @@ public abstract class AbstractFacetFactoryJUnit4TestCase {
     protected TranslationService mockTranslationService;
 
     @Mock
-    protected IsisConfigurationDefault mockConfiguration;
-
-    @Mock
     protected AuthenticationSessionProvider mockAuthenticationSessionProvider;
 
     protected IdentifiedHolder facetHolder;
@@ -101,16 +100,19 @@ public abstract class AbstractFacetFactoryJUnit4TestCase {
         }
     }
 
+    protected IsisConfigurationBuilder resetConfig() {
+        _Context.clear();
+        return _Config.configurationBuilderForTesting();
+    }
+    
+    
     @Before
     public void setUpFacetedMethodAndParameter() throws Exception {
 
         // PRODUCTION
-
+        
         context.checking(new Expectations() {{
 
-            allowing(mockServicesInjector).getConfigurationServiceInternal();
-            will(returnValue(mockConfiguration));
-
             allowing(mockServicesInjector).getPersistenceSessionServiceInternal();
             will(returnValue(mockPersistenceSessionServiceInternal));
 
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/AbstractFacetFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/AbstractFacetFactoryTest.java
index 4e4977f..2b01c1a 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/AbstractFacetFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/AbstractFacetFactoryTest.java
@@ -30,8 +30,6 @@ import org.apache.isis.applib.services.i18n.TranslationService;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetHolderImpl;
 import org.apache.isis.core.metamodel.facetapi.FeatureType;
@@ -69,15 +67,13 @@ public abstract class AbstractFacetFactoryTest extends TestCase {
 
     protected PersistenceSessionServiceInternal mockPersistenceSessionServiceInternal;
 
-    protected IsisConfigurationDefault stubConfiguration;
     protected SpecificationLoader mockSpecificationLoader;
-    protected IsisConfiguration mockConfiguration;
     protected ProgrammableMethodRemover methodRemover;
 
     protected FacetHolder facetHolder;
     protected FacetedMethod facetedMethod;
     protected FacetedMethodParameter facetedMethodParameter;
-
+    
     public static class IdentifiedHolderImpl extends FacetHolderImpl implements IdentifiedHolder {
 
         private Identifier identifier;
@@ -97,7 +93,7 @@ public abstract class AbstractFacetFactoryTest extends TestCase {
         super.setUp();
         
         // PRODUCTION
-
+        
         facetHolder = new IdentifiedHolderImpl(
                 Identifier.propertyOrCollectionIdentifier(Customer.class, "firstName"));
         facetedMethod = FacetedMethod.createForProperty(Customer.class, "firstName");
@@ -108,23 +104,22 @@ public abstract class AbstractFacetFactoryTest extends TestCase {
         methodRemover = new ProgrammableMethodRemover();
 
         mockAuthenticationSessionProvider = context.mock(AuthenticationSessionProvider.class);
-        mockConfiguration = context.mock(IsisConfiguration.class);
-        stubServicesInjector = context.mock(ServicesInjector.class);
+        
         mockTranslationService = context.mock(TranslationService.class);
-        stubConfiguration = new IsisConfigurationDefault();
         mockAuthenticationSession = context.mock(AuthenticationSession.class);
 
         mockPersistenceSessionServiceInternal = context.mock(PersistenceSessionServiceInternal.class);
 
         mockSpecificationLoader = context.mock(SpecificationLoader.class);
 
-        stubServicesInjector = new ServicesInjector(_Lists.of(
-                stubConfiguration,
+        stubServicesInjector = ServicesInjector.builderForTesting()
+                .addServices(_Lists.of(
                 mockAuthenticationSessionProvider,
                 mockSpecificationLoader,
                 mockPersistenceSessionServiceInternal,
                 mockTranslationService
-        ), stubConfiguration);
+                ))
+                .build();
 
         context.checking(new Expectations() {{
 
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/ActionMethodsFacetFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/ActionMethodsFacetFactoryTest.java
index 0ebf671..3901ec3 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/ActionMethodsFacetFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/ActionMethodsFacetFactoryTest.java
@@ -32,7 +32,6 @@ import org.apache.isis.applib.security.UserMemento;
 import org.apache.isis.applib.services.i18n.TranslationService;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facets.AbstractFacetFactoryTest;
 import org.apache.isis.core.metamodel.facets.FacetFactory.ProcessMethodContext;
@@ -62,7 +61,6 @@ import org.apache.isis.core.metamodel.facets.param.defaults.ActionParameterDefau
 import org.apache.isis.core.metamodel.facets.param.defaults.methodnum.ActionParameterDefaultsFacetViaMethod;
 import org.apache.isis.core.metamodel.facets.param.defaults.methodnum.ActionParameterDefaultsFacetViaMethodFactory;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
 import org.apache.isis.core.metamodel.spec.ObjectSpecification;
 import org.apache.isis.core.metamodel.testspec.ObjectSpecificationStub;
@@ -78,7 +76,6 @@ public class ActionMethodsFacetFactoryTest extends AbstractFacetFactoryTest {
 
     private ServicesInjector mockServicesInjector;
     private AuthenticationSessionProvider mockAuthenticationSessionProvider;
-    private ConfigurationServiceInternal stubConfigurationServiceInternal;
     private TranslationService mockTranslationService;
     private PersistenceSessionServiceInternal mockPersistenceSessionServiceInternal;
 
@@ -93,7 +90,6 @@ public class ActionMethodsFacetFactoryTest extends AbstractFacetFactoryTest {
         mockPersistenceSessionServiceInternal = context.mock(PersistenceSessionServiceInternal.class);
 
         mockAuthenticationSessionProvider = context.mock(AuthenticationSessionProvider.class);
-        stubConfigurationServiceInternal = new IsisConfigurationDefault(null);
 
         final AuthenticationSession mockAuthenticationSession = context.mock(AuthenticationSession.class);
 
@@ -111,9 +107,6 @@ public class ActionMethodsFacetFactoryTest extends AbstractFacetFactoryTest {
             allowing(mockServicesInjector).getAuthenticationSessionProvider();
             will(returnValue(mockAuthenticationSessionProvider));
 
-            allowing(mockServicesInjector).getConfigurationServiceInternal();
-            will(returnValue(stubConfigurationServiceInternal));
-
             allowing(mockServicesInjector).getSpecificationLoader();
             will(returnValue(mockSpecificationLoader));
 
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/action/ActionAnnotationFacetFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/action/ActionAnnotationFacetFactoryTest.java
index 5ff7b55..b94af93 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/action/ActionAnnotationFacetFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/action/ActionAnnotationFacetFactoryTest.java
@@ -111,10 +111,6 @@ public class ActionAnnotationFacetFactoryTest extends AbstractFacetFactoryJUnit4
         context.checking(new Expectations() {{
             allowing(mockServicesInjector).lookupServiceElseFail(AuthenticationSessionProvider.class);
             will(returnValue(mockAuthenticationSessionProvider));
-
-            allowing(mockServicesInjector).getConfigurationServiceInternal();
-            will(returnValue(mockConfiguration));
-
         }});
 
         actionMethod = findMethod(Customer.class, "someAction");
@@ -166,11 +162,8 @@ public class ActionAnnotationFacetFactoryTest extends AbstractFacetFactoryJUnit4
             allowingLoadSpecificationRequestsFor(cls, actionMethod.getReturnType());
             expectRemoveMethod(actionMethod);
 
-            context.checking(new Expectations() {{
-                allowing(mockConfiguration).getBoolean("isis.reflector.facet.actionAnnotation.domainEvent.postForDefault", true);
-                will(returnValue(true));
-            }});
-
+            resetConfig()
+            .put("isis.reflector.facet.actionAnnotation.domainEvent.postForDefault", "true");
 
             // when
             final ProcessMethodContext processMethodContext = new ProcessMethodContext(
@@ -290,11 +283,8 @@ public class ActionAnnotationFacetFactoryTest extends AbstractFacetFactoryJUnit4
             allowingLoadSpecificationRequestsFor(cls, actionMethod.getReturnType());
             expectRemoveMethod(actionMethod);
 
-            context.checking(new Expectations() {{
-                allowing(mockConfiguration).getBoolean("isis.reflector.facet.actionAnnotation.domainEvent.postForDefault", true);
-                will(returnValue(true));
-            }});
-
+            resetConfig()
+            .put("isis.reflector.facet.actionAnnotation.domainEvent.postForDefault", "true");
 
             // when
             final ProcessMethodContext processMethodContext = new ProcessMethodContext(
@@ -1166,20 +1156,12 @@ public class ActionAnnotationFacetFactoryTest extends AbstractFacetFactoryJUnit4
     }
 
     void allowingCommandConfigurationToReturn(final String value) {
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.services.command.actions");
-                will(returnValue(value));
-            }
-        });
+        resetConfig()
+        .put("isis.services.command.actions", value);
     }
     void allowingPublishingConfigurationToReturn(final String value) {
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.services.publish.actions");
-                will(returnValue(value));
-            }
-        });
+        resetConfig()
+        .put("isis.services.publish.actions", value);
     }
 
 }
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/layout/ActionLayoutAnnotationFacetFactoryJunit4Test.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/layout/ActionLayoutAnnotationFacetFactoryJunit4Test.java
index 77d8a00..b93617f 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/layout/ActionLayoutAnnotationFacetFactoryJunit4Test.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/layout/ActionLayoutAnnotationFacetFactoryJunit4Test.java
@@ -20,10 +20,10 @@
 package org.apache.isis.core.metamodel.facets.actions.layout;
 
 import org.hamcrest.CoreMatchers;
-import org.hamcrest.Matchers;
 import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
+
 import org.apache.isis.applib.annotation.ActionLayout;
 import org.apache.isis.applib.annotation.Contributed;
 import org.apache.isis.applib.annotation.DomainObject;
@@ -67,10 +67,8 @@ public class ActionLayoutAnnotationFacetFactoryJunit4Test extends AbstractFacetF
                     return "Joe";
                 }
             }
-
+            
             context.checking(new Expectations() {{
-            	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-            	will(returnValue(null));
             	
                 allowing(mockSpecificationLoader).loadSpecification(CustomerService.class);
                 will(returnValue(mockObjSpec));
@@ -107,9 +105,6 @@ public class ActionLayoutAnnotationFacetFactoryJunit4Test extends AbstractFacetF
             }
 
             context.checking(new Expectations() {{
-            	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-            	will(returnValue(null));
-            	
                 allowing(mockSpecificationLoader).loadSpecification(CustomerService.class);
                 will(returnValue(mockObjSpec));
 
@@ -146,8 +141,6 @@ public class ActionLayoutAnnotationFacetFactoryJunit4Test extends AbstractFacetF
             }
 
             context.checking(new Expectations() {{
-            	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-            	will(returnValue(null));
             	
                 allowing(mockSpecificationLoader).loadSpecification(CustomerService.class);
                 will(returnValue(mockObjSpec));
@@ -188,8 +181,6 @@ public class ActionLayoutAnnotationFacetFactoryJunit4Test extends AbstractFacetF
             }
 
             context.checking(new Expectations() {{
-            	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-            	will(returnValue(null));
             	
                 allowing(mockSpecificationLoader).loadSpecification(CustomerService.class);
                 will(returnValue(mockObjSpec));
@@ -228,9 +219,6 @@ public class ActionLayoutAnnotationFacetFactoryJunit4Test extends AbstractFacetF
             }
 
             context.checking(new Expectations() {{
-            	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-            	will(returnValue(null));
-            	
                 allowing(mockSpecificationLoader).loadSpecification(CustomerService.class);
                 will(returnValue(mockObjSpec));
 
@@ -270,9 +258,6 @@ public class ActionLayoutAnnotationFacetFactoryJunit4Test extends AbstractFacetF
             }
 
             context.checking(new Expectations() {{
-            	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-            	will(returnValue(null));            	
-            	
                 allowing(mockSpecificationLoader).loadSpecification(CustomerService.class);
                 will(returnValue(mockObjSpec));
 
@@ -312,10 +297,6 @@ public class ActionLayoutAnnotationFacetFactoryJunit4Test extends AbstractFacetF
             }
 
             context.checking(new Expectations() {{
-            	
-            	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-            	will(returnValue(null));
-            	
                 allowing(mockSpecificationLoader).loadSpecification(CustomerService.class);
                 will(returnValue(mockObjSpec));
 
@@ -356,8 +337,6 @@ public class ActionLayoutAnnotationFacetFactoryJunit4Test extends AbstractFacetF
             }
 
             context.checking(new Expectations() {{
-            	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-            	will(returnValue(null));
             	
                 allowing(mockSpecificationLoader).loadSpecification(CustomerService.class);
                 will(returnValue(mockObjSpec));
@@ -398,9 +377,7 @@ public class ActionLayoutAnnotationFacetFactoryJunit4Test extends AbstractFacetF
             }
 
             context.checking(new Expectations() {{
-            	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-            	will(returnValue(null));
-            	
+           	
                 allowing(mockSpecificationLoader).loadSpecification(Customer.class);
                 will(returnValue(mockObjSpec));
 
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/layout/ActionLayoutXmlLayoutAnnotationFacetFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/layout/ActionLayoutXmlLayoutAnnotationFacetFactoryTest.java
index 155280e..ebee7a2 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/layout/ActionLayoutXmlLayoutAnnotationFacetFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/actions/layout/ActionLayoutXmlLayoutAnnotationFacetFactoryTest.java
@@ -61,6 +61,7 @@ public class ActionLayoutXmlLayoutAnnotationFacetFactoryTest extends AbstractFac
                 return null;
             }
         }
+        
         final Method method = findMethod(Customer.class, "foz");
 
         context.checking(new Expectations() {
@@ -73,10 +74,6 @@ public class ActionLayoutXmlLayoutAnnotationFacetFactoryTest extends AbstractFac
 
                 allowing(mockObjSpec).getFacet(DomainServiceFacet.class);
                 will(returnValue(null));
-
-                allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-                will(returnValue(null));
-
             }
         });
 
@@ -113,9 +110,6 @@ public class ActionLayoutXmlLayoutAnnotationFacetFactoryTest extends AbstractFac
                 allowing(mockObjSpec).getFacet(DomainServiceFacet.class);
                 will(returnValue(null));
 
-                allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-                will(returnValue(null));
-
             }
         });
 
@@ -142,9 +136,6 @@ public class ActionLayoutXmlLayoutAnnotationFacetFactoryTest extends AbstractFac
 
             context.checking(new Expectations() {
                 {
-                	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-                	will(returnValue(null));
-                	
                     allowing(mockSpecificationLoader).loadSpecification(Customer.class);
                     will(returnValue(mockObjSpec));
 
@@ -180,9 +171,6 @@ public class ActionLayoutXmlLayoutAnnotationFacetFactoryTest extends AbstractFac
 
             context.checking(new Expectations() {
                 {
-                	allowing(mockConfiguration).getString("isis.viewer.wicket.promptStyle");
-                	will(returnValue(null));                	
-                	
                     allowing(mockSpecificationLoader).loadSpecification(Customer.class);
                     will(returnValue(mockObjSpec));
 
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/collections/collection/CollectionAnnotationFacetFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/collections/collection/CollectionAnnotationFacetFactoryTest.java
index d25589e..2757ff3 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/collections/collection/CollectionAnnotationFacetFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/collections/collection/CollectionAnnotationFacetFactoryTest.java
@@ -108,7 +108,6 @@ public class CollectionAnnotationFacetFactoryTest extends AbstractFacetFactoryJU
 
         private void addGetterFacet(final FacetHolder holder) {
             FacetUtil.addFacet(new PropertyOrCollectionAccessorFacetAbstract(mockOnType, holder, 
-                    mockConfiguration,
                     mockSpecificationLoader, 
                     mockAuthenticationSessionProvider,
                     mockPersistenceSessionServiceInternal
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/collections/layout/annotation/NamedFacetForCollectionLayoutAnnotationFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/collections/layout/annotation/NamedFacetForCollectionLayoutAnnotationFactoryTest.java
index e8aeb40..5eaf4e3 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/collections/layout/annotation/NamedFacetForCollectionLayoutAnnotationFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/collections/layout/annotation/NamedFacetForCollectionLayoutAnnotationFactoryTest.java
@@ -22,9 +22,9 @@ package org.apache.isis.core.metamodel.facets.collections.layout.annotation;
 import java.lang.reflect.Method;
 import java.util.Set;
 import java.util.SortedSet;
-import org.apache.isis.commons.internal.collections._Sets;
+
 import org.apache.isis.applib.annotation.CollectionLayout;
-import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.commons.internal.collections._Sets;
 import org.apache.isis.core.metamodel.facets.AbstractFacetFactoryTest;
 import org.apache.isis.core.metamodel.facets.FacetFactory.ProcessMethodContext;
 import org.apache.isis.core.metamodel.facets.all.named.NamedFacet;
@@ -40,15 +40,9 @@ import static org.junit.Assert.assertThat;
 public class NamedFacetForCollectionLayoutAnnotationFactoryTest extends AbstractFacetFactoryTest {
 
     public void testCollectionLayoutAnnotationNamed() {
-        final CollectionLayoutFacetFactory facetFactory = new CollectionLayoutFacetFactory() {
-            @Override protected IsisConfiguration getConfiguration() {
-                return stubConfiguration;
-            }
-        };
-
+        final CollectionLayoutFacetFactory facetFactory = new CollectionLayoutFacetFactory();
 
         class Customer {
-            @SuppressWarnings("unused")
             @CollectionLayout(named = "1st names")
             public SortedSet<String> getFirstNames() {
                 return _Sets.newTreeSet();
@@ -66,14 +60,9 @@ public class NamedFacetForCollectionLayoutAnnotationFactoryTest extends Abstract
     }
 
     public void testCollectionLayoutAnnotationNamedEscapedFalse() {
-        final CollectionLayoutFacetFactory facetFactory = new CollectionLayoutFacetFactory() {
-            @Override protected IsisConfiguration getConfiguration() {
-                return stubConfiguration;
-            }
-        };
+        final CollectionLayoutFacetFactory facetFactory = new CollectionLayoutFacetFactory();
 
         class Customer {
-            @SuppressWarnings("unused")
             @CollectionLayout(named = "1st names", namedEscaped = false)
             public Set<String> getFirstNames() {
                 return _Sets.newTreeSet();
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/ViewModelSemanticCheckingFacetFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/ViewModelSemanticCheckingFacetFactoryTest.java
index f006ed1..b1def4c 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/ViewModelSemanticCheckingFacetFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/ViewModelSemanticCheckingFacetFactoryTest.java
@@ -18,7 +18,6 @@
  */
 package org.apache.isis.core.metamodel.facets.object;
 
-import org.jmock.Expectations;
 import org.jmock.auto.Mock;
 import org.junit.Before;
 import org.junit.Rule;
@@ -26,7 +25,8 @@ import org.junit.Test;
 
 import org.apache.isis.applib.RecreatableDomainObject;
 import org.apache.isis.applib.annotation.Nature;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.metamodel.facets.FacetFactory;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorComposite;
@@ -34,7 +34,6 @@ import org.apache.isis.core.metamodel.specloader.validator.ValidationFailures;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 
 import static org.hamcrest.CoreMatchers.containsString;
-import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;
 
@@ -43,9 +42,6 @@ public class ViewModelSemanticCheckingFacetFactoryTest {
     @Rule
     public JUnitRuleMockery2 context = JUnitRuleMockery2.createFor(JUnitRuleMockery2.Mode.INTERFACES_AND_CLASSES);
 
-    @Mock
-    private IsisConfigurationDefault mockConfiguration;
-
 
     @Mock
     private ServicesInjector mockServicesInjector;
@@ -55,7 +51,7 @@ public class ViewModelSemanticCheckingFacetFactoryTest {
     private ValidationFailures processThenRefine(final Class<?> cls) {
         facetFactory.process(new FacetFactory.ProcessClassContext(cls, null, null));
         final MetaModelValidatorComposite metaModelValidator = new MetaModelValidatorComposite();
-        facetFactory.refineMetaModelValidator(metaModelValidator, null);
+        facetFactory.refineMetaModelValidator(metaModelValidator);
 
         final ValidationFailures validationFailures = new ValidationFailures();
         metaModelValidator.validate(validationFailures);
@@ -65,18 +61,12 @@ public class ViewModelSemanticCheckingFacetFactoryTest {
     @Before
     public void setUp() throws Exception {
 
-        context.checking(new Expectations() {{
-            allowing(mockConfiguration).getBoolean(with(equalTo("isis.reflector.facets.ViewModelSemanticCheckingFacetFactory.enable")), with(any(boolean.class)));
-            will(returnValue(true));
-
-        }});
+        _Context.clear();
+        _Config.configurationBuilderForTesting()
+        .add("isis.reflector.facets.ViewModelSemanticCheckingFacetFactory.enable", "true");
+        
         facetFactory = new ViewModelSemanticCheckingFacetFactory();
 
-        context.checking(new Expectations() {{
-            allowing(mockServicesInjector).getConfigurationServiceInternal();
-            will(returnValue(mockConfiguration));
-        }});
-
         facetFactory.setServicesInjector(mockServicesInjector);
     }
 
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/defaults/DefaultedFacetFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/defaults/DefaultedFacetFactoryTest.java
index 86f65b7..fd815f4 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/defaults/DefaultedFacetFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/defaults/DefaultedFacetFactoryTest.java
@@ -19,15 +19,15 @@
 
 package org.apache.isis.core.metamodel.facets.object.defaults;
 
-import java.util.Collections;
-
 import org.apache.isis.applib.adapters.DefaultsProvider;
 import org.apache.isis.applib.annotation.Defaulted;
+import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.config.internal._Config;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.metamodel.facets.AbstractFacetFactoryTest;
 import org.apache.isis.core.metamodel.facets.FacetFactory.ProcessClassContext;
 import org.apache.isis.core.metamodel.facets.object.defaults.annotcfg.DefaultedFacetAnnotationElseConfigurationFactory;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 
 public class DefaultedFacetFactoryTest extends AbstractFacetFactoryTest {
 
@@ -39,8 +39,7 @@ public class DefaultedFacetFactoryTest extends AbstractFacetFactoryTest {
 
         facetFactory = new DefaultedFacetAnnotationElseConfigurationFactory();
 
-        ServicesInjector servicesInjector = new ServicesInjector(Collections.emptyList(), stubConfiguration);
-        servicesInjector.addFallbackIfRequired(ConfigurationServiceInternal.class,  stubConfiguration);
+        ServicesInjector servicesInjector = ServicesInjector.builderForTesting().build();
         facetFactory.setServicesInjector(servicesInjector);
     }
 
@@ -144,6 +143,9 @@ public class DefaultedFacetFactoryTest extends AbstractFacetFactoryTest {
     }
 
     public void testDefaultedMustHaveANoArgConstructor() {
+        _Context.clear();
+        _Config.configurationBuilderForTesting();
+        
         facetFactory.process(new ProcessClassContext(MyDefaultedWithoutNoArgConstructor.class, methodRemover, facetedMethod));
         final DefaultedFacetAbstract facet = (DefaultedFacetAbstract) facetedMethod.getFacet(DefaultedFacet.class);
         assertNull(facet);
@@ -188,8 +190,12 @@ public class DefaultedFacetFactoryTest extends AbstractFacetFactoryTest {
     }
 
     public void testDefaultedProviderNameCanBePickedUpFromConfiguration() {
+        
+        _Context.clear();
+        IsisConfigurationBuilder configurationBuilderForTesting = _Config.configurationBuilderForTesting();
+        
         final String className = "org.apache.isis.core.metamodel.facets.object.defaults.DefaultedFacetFactoryTest$MyDefaultedWithDefaultsProviderSpecifiedUsingConfiguration";
-        stubConfiguration.add(DefaultsProviderUtil.DEFAULTS_PROVIDER_NAME_KEY_PREFIX + canonical(className) + DefaultsProviderUtil.DEFAULTS_PROVIDER_NAME_KEY_SUFFIX, className);
+        configurationBuilderForTesting.put(DefaultsProviderUtil.DEFAULTS_PROVIDER_NAME_KEY_PREFIX + canonical(className) + DefaultsProviderUtil.DEFAULTS_PROVIDER_NAME_KEY_SUFFIX, className);
         facetFactory.process(new ProcessClassContext(MyDefaultedWithDefaultsProviderSpecifiedUsingConfiguration.class, methodRemover, facetedMethod));
         final DefaultedFacetAbstract facet = (DefaultedFacetAbstract) facetedMethod.getFacet(DefaultedFacet.class);
         assertNotNull(facet);
@@ -211,8 +217,12 @@ public class DefaultedFacetFactoryTest extends AbstractFacetFactoryTest {
     }
 
     public void testNonAnnotatedDefaultedCanBePickedUpFromConfiguration() {
+        
+        _Context.clear();
+        IsisConfigurationBuilder configurationBuilderForTesting = _Config.configurationBuilderForTesting();
+        
         final String className = "org.apache.isis.core.metamodel.facets.object.defaults.DefaultedFacetFactoryTest$NonAnnotatedDefaultedDefaultsProviderSpecifiedUsingConfiguration";
-        stubConfiguration.add(DefaultsProviderUtil.DEFAULTS_PROVIDER_NAME_KEY_PREFIX + canonical(className) + DefaultsProviderUtil.DEFAULTS_PROVIDER_NAME_KEY_SUFFIX, className);
+        configurationBuilderForTesting.put(DefaultsProviderUtil.DEFAULTS_PROVIDER_NAME_KEY_PREFIX + canonical(className) + DefaultsProviderUtil.DEFAULTS_PROVIDER_NAME_KEY_SUFFIX, className);
         facetFactory.process(new ProcessClassContext(NonAnnotatedDefaultedDefaultsProviderSpecifiedUsingConfiguration.class, methodRemover, facetedMethod));
         final DefaultedFacetAbstract facet = (DefaultedFacetAbstract) facetedMethod.getFacet(DefaultedFacet.class);
         assertNotNull(facet);
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/domainobject/DomainObjectAnnotationFacetFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/domainobject/DomainObjectAnnotationFacetFactoryTest.java
index 9af5133..7c20293 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/domainobject/DomainObjectAnnotationFacetFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/domainobject/DomainObjectAnnotationFacetFactoryTest.java
@@ -19,12 +19,14 @@
 
 package org.apache.isis.core.metamodel.facets.object.domainobject;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.hamcrest.CoreMatchers.notNullValue;
-import static org.junit.Assert.assertThat;
-
 import java.util.UUID;
 
+import org.jmock.Expectations;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
 import org.apache.isis.applib.annotation.Bounding;
 import org.apache.isis.applib.annotation.DomainObject;
 import org.apache.isis.applib.services.HasUniqueId;
@@ -51,11 +53,10 @@ import org.apache.isis.core.metamodel.facets.object.publishedobject.PublishedObj
 import org.apache.isis.core.metamodel.facets.object.viewmodel.ViewModelFacet;
 import org.apache.isis.core.metamodel.facets.objectvalue.choices.ChoicesFacet;
 import org.apache.isis.core.metamodel.spec.ObjectSpecId;
-import org.jmock.Expectations;
-import org.junit.After;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.junit.Assert.assertThat;
 
 public class DomainObjectAnnotationFacetFactoryTest extends AbstractFacetFactoryJUnit4TestCase {
 
@@ -88,25 +89,12 @@ public class DomainObjectAnnotationFacetFactoryTest extends AbstractFacetFactory
     }
 
     protected void allowingConfigurationToReturn(final String name, final String value) {
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString(name);
-                will(returnValue(value));
-
-                // anything else
-                ignoring(mockConfiguration);
-            }
-        });
+        resetConfig().put(name, value);
     }
 
     protected void ignoringConfiguration() {
-        context.checking(new Expectations() {
-            {
-                ignoring(mockConfiguration);
-            }
-        });
-    }
 
+    }
 
     public static class Auditing extends DomainObjectAnnotationFacetFactoryTest {
 
@@ -443,7 +431,7 @@ public class DomainObjectAnnotationFacetFactoryTest extends AbstractFacetFactory
                     will(returnValue(true));
                     
                     // anything else
-                    ignoring(mockConfiguration);
+                    
                 }
             });
             
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/domainobjectlayout/DomainObjectLayoutFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/domainobjectlayout/DomainObjectLayoutFactoryTest.java
index aca65fd..7e8cee4 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/domainobjectlayout/DomainObjectLayoutFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/domainobjectlayout/DomainObjectLayoutFactoryTest.java
@@ -106,7 +106,7 @@ public class DomainObjectLayoutFactoryTest extends AbstractFacetFactoryJUnit4Tes
 
             @Before
             public void setUp2() throws Exception {
-                context.ignoring(mockConfiguration);
+                super.resetConfig();
             }
 
             @Test
@@ -143,6 +143,11 @@ public class DomainObjectLayoutFactoryTest extends AbstractFacetFactoryJUnit4Tes
         }
 
         public static class ForViewModelLayout extends Bookmarking {
+            
+            @Before
+            public void setUp2() throws Exception {
+                super.resetConfig();
+            }
 
             @Test
             public void whenSpecified() {
@@ -189,7 +194,7 @@ public class DomainObjectLayoutFactoryTest extends AbstractFacetFactoryJUnit4Tes
 
             @Before
             public void setUp2() throws Exception {
-                context.ignoring(mockConfiguration);
+                super.resetConfig();
             }
 
             @Before
@@ -272,7 +277,7 @@ public class DomainObjectLayoutFactoryTest extends AbstractFacetFactoryJUnit4Tes
 
             @Before
             public void setUp2() throws Exception {
-                context.ignoring(mockConfiguration);
+                super.resetConfig();
             }
 
 
@@ -353,7 +358,7 @@ public class DomainObjectLayoutFactoryTest extends AbstractFacetFactoryJUnit4Tes
 
             @Before
             public void setUp2() throws Exception {
-                context.ignoring(mockConfiguration);
+                super.resetConfig();
             }
 
             @Test
@@ -431,7 +436,7 @@ public class DomainObjectLayoutFactoryTest extends AbstractFacetFactoryJUnit4Tes
 
             @Before
             public void setUp2() throws Exception {
-                context.ignoring(mockConfiguration);
+                super.resetConfig();
             }
 
             @Test
@@ -509,7 +514,7 @@ public class DomainObjectLayoutFactoryTest extends AbstractFacetFactoryJUnit4Tes
 
             @Before
             public void setUp2() throws Exception {
-                context.ignoring(mockConfiguration);
+                super.resetConfig();
             }
 
             @Test
@@ -587,7 +592,7 @@ public class DomainObjectLayoutFactoryTest extends AbstractFacetFactoryJUnit4Tes
 
             @Before
             public void setUp2() throws Exception {
-                context.ignoring(mockConfiguration);
+                super.resetConfig();
             }
 
             @Test
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/value/ValueFacetAnnotationOrConfigurationFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/value/ValueFacetAnnotationOrConfigurationFactoryTest.java
index e094ec4..1bb861f 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/value/ValueFacetAnnotationOrConfigurationFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/object/value/ValueFacetAnnotationOrConfigurationFactoryTest.java
@@ -24,6 +24,9 @@ import org.apache.isis.applib.adapters.DefaultsProvider;
 import org.apache.isis.applib.adapters.EncoderDecoder;
 import org.apache.isis.applib.adapters.Parser;
 import org.apache.isis.applib.annotation.Value;
+import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.config.internal._Config;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.metamodel.facets.AbstractFacetFactoryTest;
 import org.apache.isis.core.metamodel.facets.FacetFactory.ProcessClassContext;
 import org.apache.isis.core.metamodel.facets.object.defaults.DefaultedFacet;
@@ -431,7 +434,10 @@ public class ValueFacetAnnotationOrConfigurationFactoryTest extends AbstractFace
         // given
         final String className = "org.apache.isis.core.metamodel.facets.object.value.ValueFacetAnnotationOrConfigurationFactoryTest$MyValueWithSemanticsProviderSpecifiedUsingConfiguration";
 
-        stubConfiguration.add(ValueSemanticsProviderUtil.SEMANTICS_PROVIDER_NAME_KEY_PREFIX + canonical(className) + ValueSemanticsProviderUtil.SEMANTICS_PROVIDER_NAME_KEY_SUFFIX, className);
+        _Context.clear();
+        IsisConfigurationBuilder configurationBuilderForTesting = _Config.configurationBuilderForTesting();
+        
+        configurationBuilderForTesting.put(ValueSemanticsProviderUtil.SEMANTICS_PROVIDER_NAME_KEY_PREFIX + canonical(className) + ValueSemanticsProviderUtil.SEMANTICS_PROVIDER_NAME_KEY_SUFFIX, className);
 
         // when
         facetFactory.process(new ProcessClassContext(MyValueWithSemanticsProviderSpecifiedUsingConfiguration.class, methodRemover, facetedMethod));
@@ -483,8 +489,10 @@ public class ValueFacetAnnotationOrConfigurationFactoryTest extends AbstractFace
 
         // given
         final String className = "org.apache.isis.core.metamodel.facets.object.value.ValueFacetAnnotationOrConfigurationFactoryTest$NonAnnotatedValueSemanticsProviderSpecifiedUsingConfiguration";
+        _Context.clear();
+        IsisConfigurationBuilder configurationBuilderForTesting = _Config.configurationBuilderForTesting();
 
-        stubConfiguration.add(ValueSemanticsProviderUtil.SEMANTICS_PROVIDER_NAME_KEY_PREFIX + canonical(className) + ValueSemanticsProviderUtil.SEMANTICS_PROVIDER_NAME_KEY_SUFFIX, className);
+        configurationBuilderForTesting.put(ValueSemanticsProviderUtil.SEMANTICS_PROVIDER_NAME_KEY_PREFIX + canonical(className) + ValueSemanticsProviderUtil.SEMANTICS_PROVIDER_NAME_KEY_SUFFIX, className);
 
 
         // when
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/properties/property/PropertyAnnotationFacetFactoryTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/properties/property/PropertyAnnotationFacetFactoryTest.java
index 1c1fb43..b68d977 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/properties/property/PropertyAnnotationFacetFactoryTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/properties/property/PropertyAnnotationFacetFactoryTest.java
@@ -118,7 +118,6 @@ public class PropertyAnnotationFacetFactoryTest extends AbstractFacetFactoryJUni
 
         private void addGetterFacet(final FacetHolder holder) {
             FacetUtil.addFacet(new PropertyOrCollectionAccessorFacetAbstract(mockOnType, holder,
-                    mockConfiguration,
                     mockSpecificationLoader, 
                     mockAuthenticationSessionProvider,
                     mockPersistenceSessionServiceInternal
@@ -337,10 +336,9 @@ public class PropertyAnnotationFacetFactoryTest extends AbstractFacetFactoryJUni
 
             // expect
             allowingLoadSpecificationRequestsFor(cls, propertyMethod.getReturnType());
-            context.checking(new Expectations() {{
-                oneOf(mockConfiguration).getBoolean("isis.reflector.facet.propertyAnnotation.domainEvent.postForDefault", true);
-                will(returnValue(true));
-            }});
+            
+            resetConfig()
+            .put("isis.reflector.facet.propertyAnnotation.domainEvent.postForDefault", "true");
 
             // when
             final FacetFactory.ProcessMethodContext processMethodContext = new FacetFactory.ProcessMethodContext(cls, null,
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/BigDecimalValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/BigDecimalValueSemanticsProviderTest.java
index 942b22a..948b178 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/BigDecimalValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/BigDecimalValueSemanticsProviderTest.java
@@ -19,12 +19,8 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
-
 import java.math.BigDecimal;
 
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -33,6 +29,9 @@ import org.apache.isis.core.metamodel.facetapi.FacetHolderImpl;
 import org.apache.isis.core.metamodel.facets.object.parseable.TextEntryParseException;
 import org.apache.isis.core.metamodel.facets.value.bigdecimal.BigDecimalValueSemanticsProvider;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
 public class BigDecimalValueSemanticsProviderTest extends ValueSemanticsProviderAbstractTestCase {
 
     private BigDecimalValueSemanticsProvider value;
@@ -42,12 +41,9 @@ public class BigDecimalValueSemanticsProviderTest extends ValueSemanticsProvider
     @Before
     public void setUp() throws Exception {
         super.setUp();
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.decimal");
-                will(returnValue(null));
-            }
-        });
+        
+        configurationBuilderForTesting
+        .put("isis.value.format.decimal", null);
 
         bigDecimal = new BigDecimal("34132.199");
         allowMockAdapterToReturn(bigDecimal);
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/BigIntValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/BigIntValueSemanticsProviderTest.java
index 3a12e4b..694188a 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/BigIntValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/BigIntValueSemanticsProviderTest.java
@@ -19,12 +19,8 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
-
 import java.math.BigInteger;
 
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -33,6 +29,9 @@ import org.apache.isis.core.metamodel.facetapi.FacetHolderImpl;
 import org.apache.isis.core.metamodel.facets.object.parseable.TextEntryParseException;
 import org.apache.isis.core.metamodel.facets.value.biginteger.BigIntegerValueSemanticsProvider;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
 public class BigIntValueSemanticsProviderTest extends ValueSemanticsProviderAbstractTestCase {
 
     private BigInteger bigInt;
@@ -44,12 +43,8 @@ public class BigIntValueSemanticsProviderTest extends ValueSemanticsProviderAbst
         bigInt = new BigInteger("132199");
         allowMockAdapterToReturn(bigInt);
 
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.int");
-                will(returnValue(null));
-            }
-        });
+        configurationBuilderForTesting
+        .put("isis.value.format.int", null);
 
         holder = new FacetHolderImpl();
         setValue(new BigIntegerValueSemanticsProvider(holder, mockServicesInjector));
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ByteValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ByteValueSemanticsProviderTest.java
index c1c890f..37c7cbf 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ByteValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ByteValueSemanticsProviderTest.java
@@ -19,10 +19,6 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
-
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -32,6 +28,9 @@ import org.apache.isis.core.metamodel.facets.object.parseable.TextEntryParseExce
 import org.apache.isis.core.metamodel.facets.value.bytes.ByteValueSemanticsProviderAbstract;
 import org.apache.isis.core.metamodel.facets.value.bytes.ByteWrapperValueSemanticsProvider;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
 public class ByteValueSemanticsProviderTest extends ValueSemanticsProviderAbstractTestCase {
 
     private ByteValueSemanticsProviderAbstract value;
@@ -45,13 +44,9 @@ public class ByteValueSemanticsProviderTest extends ValueSemanticsProviderAbstra
         allowMockAdapterToReturn(byteObj);
         holder = new FacetHolderImpl();
 
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.byte");
-                will(returnValue(null));
-            }
-        });
-
+        configurationBuilderForTesting
+        .put("isis.value.format.byte", null);
+        
         setValue(value = new ByteWrapperValueSemanticsProvider(holder, mockServicesInjector));
     }
 
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/DoubleValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/DoubleValueSemanticsProviderTest.java
index fc6378f..7860611 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/DoubleValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/DoubleValueSemanticsProviderTest.java
@@ -19,10 +19,6 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
-
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -31,6 +27,9 @@ import org.apache.isis.core.metamodel.facetapi.FacetHolderImpl;
 import org.apache.isis.core.metamodel.facets.object.parseable.TextEntryParseException;
 import org.apache.isis.core.metamodel.facets.value.doubles.DoubleWrapperValueSemanticsProvider;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
 public class DoubleValueSemanticsProviderTest extends ValueSemanticsProviderAbstractTestCase {
 
     private Double doubleObj;
@@ -39,13 +38,9 @@ public class DoubleValueSemanticsProviderTest extends ValueSemanticsProviderAbst
 
     @Before
     public void setUpObjects() throws Exception {
-
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.double");
-                will(returnValue(null));
-            }
-        });
+        
+        configurationBuilderForTesting
+        .put("isis.value.format.double", null);
 
         holder = new FacetHolderImpl();
         setValue(new DoubleWrapperValueSemanticsProvider(holder, mockServicesInjector));
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/FloatValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/FloatValueSemanticsProviderTest.java
index a3cd834..4e04a5b 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/FloatValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/FloatValueSemanticsProviderTest.java
@@ -19,10 +19,6 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
-
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -32,6 +28,9 @@ import org.apache.isis.core.metamodel.facets.object.parseable.TextEntryParseExce
 import org.apache.isis.core.metamodel.facets.value.floats.FloatValueSemanticsProviderAbstract;
 import org.apache.isis.core.metamodel.facets.value.floats.FloatWrapperValueSemanticsProvider;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
 public class FloatValueSemanticsProviderTest extends ValueSemanticsProviderAbstractTestCase {
 
     private FloatValueSemanticsProviderAbstract value;
@@ -40,12 +39,9 @@ public class FloatValueSemanticsProviderTest extends ValueSemanticsProviderAbstr
 
     @Before
     public void setUpObjects() throws Exception {
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.float");
-                will(returnValue(null));
-            }
-        });
+        
+        configurationBuilderForTesting
+        .put("isis.value.format.float", null);
 
         float1 = new Float(32.5f);
         allowMockAdapterToReturn(float1);
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ImageValueSemanticsProviderAbstractTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ImageValueSemanticsProviderAbstractTest.java
index d91b372..aa4952f 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ImageValueSemanticsProviderAbstractTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ImageValueSemanticsProviderAbstractTest.java
@@ -19,24 +19,23 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.junit.Assert.assertEquals;
-
 import java.awt.Image;
 
-import org.apache.isis.core.metamodel.services.ServicesInjector;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
-import org.jmock.Expectations;
 import org.jmock.auto.Mock;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 
+import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.value.image.ImageValueSemanticsProviderAbstract;
+import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
 
+import static org.junit.Assert.assertEquals;
+
 public class ImageValueSemanticsProviderAbstractTest {
 
     @Rule
@@ -49,19 +48,13 @@ public class ImageValueSemanticsProviderAbstractTest {
     private ServicesInjector mockServicesInjector;
 
     @Mock
-    private ConfigurationServiceInternal mockConfiguration;
+    private IsisConfiguration mockConfiguration;
 
     private TestImageSemanticsProvider adapter;
 
     @Before
     public void setUp() throws Exception {
 
-        context.checking(new Expectations() {{
-            allowing(mockServicesInjector).getConfigurationServiceInternal();
-            will(returnValue(mockConfiguration));
-
-        }});
-
         adapter = new TestImageSemanticsProvider(mockFacetHolder, mockServicesInjector);
     }
     
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/IntValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/IntValueSemanticsProviderTest.java
index b4e5519..34e6a90 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/IntValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/IntValueSemanticsProviderTest.java
@@ -43,13 +43,9 @@ public class IntValueSemanticsProviderTest extends ValueSemanticsProviderAbstrac
         integer = Integer.valueOf(32);
         allowMockAdapterToReturn(integer);
 
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.int");
-                will(returnValue(null));
-            }
-        });
-
+        configurationBuilderForTesting
+        .put("isis.value.format.int", null);
+        
         holder = new FacetHolderImpl();
         setValue(value = new IntWrapperValueSemanticsProvider(holder, mockServicesInjector));
     }
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaSqlDateValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaSqlDateValueSemanticsProviderTest.java
index 70b620a..89f841b 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaSqlDateValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaSqlDateValueSemanticsProviderTest.java
@@ -25,7 +25,6 @@ import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.TimeZone;
 
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -45,12 +44,9 @@ public class JavaSqlDateValueSemanticsProviderTest extends ValueSemanticsProvide
 
     @Before
     public void setUpObjects() throws Exception {
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.date");
-                will(returnValue(null));
-            }
-        });
+        
+        configurationBuilderForTesting
+        .put("isis.value.format.date", null);
 
         TestClock.initialize();
         date = new Date(0);
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaSqlTimeValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaSqlTimeValueSemanticsProviderTest.java
index 93d18ce..a503dff 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaSqlTimeValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaSqlTimeValueSemanticsProviderTest.java
@@ -23,7 +23,6 @@ import java.sql.Time;
 import java.util.Calendar;
 import java.util.TimeZone;
 
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Ignore;
 import org.junit.Test;
@@ -42,12 +41,9 @@ public class JavaSqlTimeValueSemanticsProviderTest extends ValueSemanticsProvide
 
     @Before
     public void setUpObjects() throws Exception {
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.time");
-                will(returnValue(null));
-            }
-        });
+        
+        configurationBuilderForTesting
+        .put("isis.value.format.time", null);
 
         final Calendar c = Calendar.getInstance();
         c.setTimeZone(TimeZone.getTimeZone("GMT"));
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaUtilDateValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaUtilDateValueSemanticsProviderTest.java
index 02ad91b..7d58e66 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaUtilDateValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/JavaUtilDateValueSemanticsProviderTest.java
@@ -24,7 +24,6 @@ import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.TimeZone;
 
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -43,12 +42,10 @@ public class JavaUtilDateValueSemanticsProviderTest extends ValueSemanticsProvid
 
     @Before
     public void setUpObjects() throws Exception {
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.datetime");
-                will(returnValue(null));
-            }
-        });
+        
+        configurationBuilderForTesting
+        .put("isis.value.format.datetime", null);
+
 
         TestClock.initialize();
         date = new java.util.Date(0);
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/LongValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/LongValueSemanticsProviderTest.java
index b397fa3..2a15e47 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/LongValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/LongValueSemanticsProviderTest.java
@@ -19,10 +19,6 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
-
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -32,6 +28,9 @@ import org.apache.isis.core.metamodel.facets.object.parseable.TextEntryParseExce
 import org.apache.isis.core.metamodel.facets.value.longs.LongValueSemanticsProviderAbstract;
 import org.apache.isis.core.metamodel.facets.value.longs.LongWrapperValueSemanticsProvider;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
 public class LongValueSemanticsProviderTest extends ValueSemanticsProviderAbstractTestCase {
 
     private LongValueSemanticsProviderAbstract value;
@@ -45,12 +44,8 @@ public class LongValueSemanticsProviderTest extends ValueSemanticsProviderAbstra
         allowMockAdapterToReturn(longObj);
         holder = new FacetHolderImpl();
 
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.long");
-                will(returnValue(null));
-            }
-        });
+        configurationBuilderForTesting
+        .put("isis.value.format.long", null);
 
         setValue(value = new LongWrapperValueSemanticsProvider(holder, mockServicesInjector));
     }
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/PercentageValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/PercentageValueSemanticsProviderTest.java
index 6461fde..8c50a4f 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/PercentageValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/PercentageValueSemanticsProviderTest.java
@@ -19,9 +19,6 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.junit.Assert.assertEquals;
-
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -30,6 +27,8 @@ import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facetapi.FacetHolderImpl;
 import org.apache.isis.core.metamodel.facets.value.percentage.PercentageValueSemanticsProvider;
 
+import static org.junit.Assert.assertEquals;
+
 public class PercentageValueSemanticsProviderTest extends ValueSemanticsProviderAbstractTestCase {
     private PercentageValueSemanticsProvider adapter;
     private Percentage percentage;
@@ -37,12 +36,9 @@ public class PercentageValueSemanticsProviderTest extends ValueSemanticsProvider
 
     @Before
     public void setUpObjects() throws Exception {
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.percentage");
-                will(returnValue(null));
-            }
-        });
+        
+        configurationBuilderForTesting
+        .put("isis.value.format.percentage", null);
 
         percentage = new Percentage(0.105f);
         allowMockAdapterToReturn(percentage);
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ShortValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ShortValueSemanticsProviderTest.java
index d4f30bf..e608e9c 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ShortValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ShortValueSemanticsProviderTest.java
@@ -19,10 +19,6 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
-
-import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
@@ -32,6 +28,9 @@ import org.apache.isis.core.metamodel.facets.object.parseable.TextEntryParseExce
 import org.apache.isis.core.metamodel.facets.value.shortint.ShortValueSemanticsProviderAbstract;
 import org.apache.isis.core.metamodel.facets.value.shortint.ShortWrapperValueSemanticsProvider;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
 public class ShortValueSemanticsProviderTest extends ValueSemanticsProviderAbstractTestCase {
 
     private ShortValueSemanticsProviderAbstract value;
@@ -40,13 +39,10 @@ public class ShortValueSemanticsProviderTest extends ValueSemanticsProviderAbstr
 
     @Before
     public void setUpObjects() throws Exception {
-        context.checking(new Expectations() {
-            {
-                allowing(mockConfiguration).getString("isis.value.format.short");
-                will(returnValue(null));
-            }
-        });
 
+        configurationBuilderForTesting
+        .put("isis.value.format.short", null);
+        
         short1 = Short.valueOf((short) 32);
         allowMockAdapterToReturn(short1);
 
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ValueSemanticsProviderAbstractTestCase.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ValueSemanticsProviderAbstractTestCase.java
index c2f682b..06e3c5e 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ValueSemanticsProviderAbstractTestCase.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/ValueSemanticsProviderAbstractTestCase.java
@@ -19,14 +19,6 @@
 
 package org.apache.isis.core.metamodel.facets.value;
 
-import static org.apache.isis.core.unittestsupport.jmocking.JMockActions.returnArgument;
-import static org.hamcrest.CoreMatchers.is;
-import static org.hamcrest.CoreMatchers.not;
-import static org.hamcrest.CoreMatchers.nullValue;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.fail;
-
 import java.util.Locale;
 
 import org.jmock.Expectations;
@@ -37,7 +29,9 @@ import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.facets.object.encodeable.EncodableFacet;
@@ -46,12 +40,18 @@ import org.apache.isis.core.metamodel.facets.object.parseable.ParseableFacet;
 import org.apache.isis.core.metamodel.facets.object.parseable.parser.ParseableFacetUsingParser;
 import org.apache.isis.core.metamodel.facets.object.value.vsp.ValueSemanticsProviderAndFacetAbstract;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
 
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.not;
+import static org.hamcrest.CoreMatchers.nullValue;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.fail;
+
 public abstract class ValueSemanticsProviderAbstractTestCase {
 
     @Rule
@@ -64,8 +64,6 @@ public abstract class ValueSemanticsProviderAbstractTestCase {
     @Mock
     protected FacetHolder mockFacetHolder;
     @Mock
-    protected ConfigurationServiceInternal mockConfiguration;
-    @Mock
     protected ServicesInjector mockServicesInjector;
     @Mock
     protected PersistenceSessionServiceInternal mockSessionServiceInternal;
@@ -75,24 +73,17 @@ public abstract class ValueSemanticsProviderAbstractTestCase {
     protected AuthenticationSessionProvider mockAuthenticationSessionProvider;
     @Mock
     protected ObjectAdapter mockAdapter;
+    
+    protected IsisConfigurationBuilder configurationBuilderForTesting;
 
     @Before
     public void setUp() throws Exception {
         Locale.setDefault(Locale.UK);
-
+        
+        configurationBuilderForTesting = _Config.configurationBuilderForTesting();
+        
         context.checking(new Expectations() {
             {
-                allowing(mockConfiguration).getString(with(any(String.class)), with(any(String.class)));
-                will(returnArgument(1));
-
-                allowing(mockConfiguration).getBoolean(with(any(String.class)), with(any(Boolean.class)));
-                will(returnArgument(1));
-
-                allowing(mockConfiguration).getString("isis.locale");
-                will(returnValue(null));
-
-                allowing(mockServicesInjector).getConfigurationServiceInternal();
-                will(returnValue(mockConfiguration));
 
                 allowing(mockServicesInjector).getAuthenticationSessionProvider();
                 will(returnValue(mockAuthenticationSessionProvider));
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/datetimejodalocal/JodaLocalDateTimeValueSemanticsProviderTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/datetimejodalocal/JodaLocalDateTimeValueSemanticsProviderTest.java
index 5086210..e69a7e3 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/datetimejodalocal/JodaLocalDateTimeValueSemanticsProviderTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/facets/value/datetimejodalocal/JodaLocalDateTimeValueSemanticsProviderTest.java
@@ -18,14 +18,14 @@
  */
 package org.apache.isis.core.metamodel.facets.value.datetimejodalocal;
 
-import org.jmock.Expectations;
 import org.jmock.auto.Mock;
 import org.joda.time.LocalDateTime;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.config.internal._Config;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
@@ -45,24 +45,14 @@ public class JodaLocalDateTimeValueSemanticsProviderTest {
     @Mock
     ServicesInjector mockServicesInjector;
 
-    @Mock
-    IsisConfigurationDefault mockConfiguration;
-
     JodaLocalDateTimeValueSemanticsProvider provider;
 
     @Before
     public void setUp() throws Exception {
-        context.checking(new Expectations() {{
-
-            ignoring(mockFacetHolder);
-
-            allowing(mockServicesInjector).getConfigurationServiceInternal();
-            will(returnValue(mockConfiguration));
-
-            allowing(mockConfiguration).getString("isis.value.format.datetime","medium");
-            will(returnValue("iso_encoding"));
-        }});
-
+        
+        IsisConfigurationBuilder configBilder = _Config.configurationBuilderForTesting();
+        configBilder.put("isis.value.format.datetime", "iso_encoding");
+        
         provider = new JodaLocalDateTimeValueSemanticsProvider(mockFacetHolder, mockServicesInjector);
 
     }
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest.java
index 24c1060..739acc5 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest.java
@@ -19,7 +19,6 @@
 
 package org.apache.isis.core.metamodel.services;
 
-import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -32,8 +31,7 @@ import org.junit.Rule;
 import org.junit.Test;
 
 import org.apache.isis.applib.services.repository.RepositoryService;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
-import org.apache.isis.core.metamodel.specloader.InjectorMethodEvaluatorDefault;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
 
@@ -50,6 +48,8 @@ public class ServicesInjectorDefaultTest {
     private Service2 mockService2;
     @Mock
     private SomeDomainObject mockDomainObject;
+    
+    protected IsisConfigurationBuilder configurationBuilderForTesting;
 
     private ServicesInjector injector;
 
@@ -74,11 +74,12 @@ public class ServicesInjectorDefaultTest {
 
     @Before
     public void setUp() throws Exception {
-        final Object[] services = { mockRepository, mockService1, mockService2 };
 
-        IsisConfigurationDefault stubConfiguration = new IsisConfigurationDefault();
-        injector = ServicesInjector.forTesting(
-        		Arrays.asList(services), stubConfiguration, new InjectorMethodEvaluatorDefault());
+        injector = ServicesInjector.builderForTesting()
+                .addService(mockRepository)
+                .addService(mockService1)
+                .addService(mockService2)
+        		.build();
     }
 
     @After
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest_usingFields.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest_usingFields.java
index 073ce1b..942a6ac 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest_usingFields.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest_usingFields.java
@@ -19,19 +19,19 @@
 
 package org.apache.isis.core.metamodel.services;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
 import java.util.Arrays;
 
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+
 import org.apache.isis.applib.services.repository.RepositoryService;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.services.repository.RepositoryServiceInternalDefault;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
-import org.junit.Before;
-import org.junit.Rule;
-import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
 
 public class ServicesInjectorDefaultTest_usingFields {
 
@@ -82,8 +82,9 @@ public class ServicesInjectorDefaultTest_usingFields {
         service1 = new SomeDomainService1();
         service3 = new SomeDomainService3();
         service2 = new SomeDomainService2();
-        final IsisConfigurationDefault stubConfiguration = new IsisConfigurationDefault();
-        injector = new ServicesInjector(Arrays.asList(container, service1, service3, service2), stubConfiguration);
+        injector = ServicesInjector.builderForTesting()
+                .addServices(Arrays.asList(container, service1, service3, service2))
+                .build();
     }
 
     @Test
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest_validateServices.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest_validateServices.java
index f8b4f69..0a4c13e 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest_validateServices.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/ServicesInjectorDefaultTest_validateServices.java
@@ -21,12 +21,10 @@ package org.apache.isis.core.metamodel.services;
 
 import java.util.List;
 
-import org.apache.isis.commons.internal.collections._Lists;
-
 import org.junit.Before;
 import org.junit.Test;
 
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.commons.internal.collections._Lists;
 
 public class ServicesInjectorDefaultTest_validateServices {
 
@@ -47,12 +45,10 @@ public class ServicesInjectorDefaultTest_validateServices {
     public static class ValidateServicesTestValidateServices extends ServicesInjectorDefaultTest_validateServices {
 
         List<Object> serviceList;
-        IsisConfigurationDefault stubConfiguration;
 
         @Before
         public void setUp() throws Exception {
             serviceList = _Lists.newArrayList();
-            stubConfiguration = new IsisConfigurationDefault();
         }
 
         @Test(expected=IllegalStateException.class)
@@ -62,7 +58,9 @@ public class ServicesInjectorDefaultTest_validateServices {
             serviceList.add(new DomainServiceWithSomeId());
             serviceList.add(new DomainServiceWithDuplicateId());
 
-            servicesInjector = ServicesInjector.forTesting(serviceList, stubConfiguration, null);
+            servicesInjector = ServicesInjector.builderForTesting()
+                    .addServices(serviceList)
+                    .build();
 
             // when
             servicesInjector.validateServices();
@@ -74,7 +72,9 @@ public class ServicesInjectorDefaultTest_validateServices {
             serviceList.add(new DomainServiceWithSomeId());
             serviceList.add(new DomainServiceWithDifferentId());
 
-            servicesInjector = ServicesInjector.forTesting(serviceList, stubConfiguration, null);
+            servicesInjector = ServicesInjector.builderForTesting()
+                    .addServices(serviceList)
+                    .build();
 
             // when
             servicesInjector.validateServices();
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/metamodel/MetaModelServiceDefaultTest.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/metamodel/MetaModelServiceDefaultTest.java
index a54abe1..d686418 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/metamodel/MetaModelServiceDefaultTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/services/metamodel/MetaModelServiceDefaultTest.java
@@ -43,7 +43,6 @@ import org.apache.isis.applib.services.metamodel.DomainMember;
 import org.apache.isis.applib.services.metamodel.DomainModel;
 import org.apache.isis.commons.internal.base._Casts;
 import org.apache.isis.commons.internal.collections._Lists;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facets.FacetedMethod;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
@@ -58,7 +57,6 @@ import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
 
 class MetaModelServiceDefaultTest {
 
-    IsisConfigurationDefault stubConfiguration;
     ServicesInjector stubServicesInjector;
     MetaModelServiceDefault mockMetaModelService;
     SpecificationLoader specificationLoader;
@@ -73,15 +71,15 @@ class MetaModelServiceDefaultTest {
         
         JUnitRuleMockery2 context = JUnitRuleMockery2.createFor(Mode.INTERFACES_AND_CLASSES);
         
-        stubConfiguration = new IsisConfigurationDefault();
-
         stubServicesInjector =
-                new ServicesInjector(_Lists.of(context.mock(
+                ServicesInjector.builderForTesting()
+                .addServices(_Lists.of(context.mock(
                         PersistenceSessionServiceInternal.class
-                        )), stubConfiguration);
+                        )))
+                .build();
         
         specificationLoader = 
-                new SpecificationLoader(stubConfiguration, null, null, stubServicesInjector);
+                new SpecificationLoader(null, null, stubServicesInjector);
         
         stubServicesInjector.addFallbackIfRequired(SpecificationLoader.class, specificationLoader);
         
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/specloader/SpecificationLoaderTestAbstract.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/specloader/SpecificationLoaderTestAbstract.java
index 2f7aafc..9ccd327 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/specloader/SpecificationLoaderTestAbstract.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/specloader/SpecificationLoaderTestAbstract.java
@@ -31,10 +31,8 @@ import org.junit.rules.ExpectedException;
 import org.apache.isis.applib.AppManifest;
 import org.apache.isis.applib.services.grid.GridService;
 import org.apache.isis.applib.services.message.MessageService;
-import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.commons.internal.collections._Sets;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.facetapi.Facet;
 import org.apache.isis.core.metamodel.facets.actcoll.typeof.TypeOfFacet;
 import org.apache.isis.core.metamodel.facets.all.describedas.DescribedAsFacet;
@@ -42,6 +40,7 @@ import org.apache.isis.core.metamodel.facets.all.named.NamedFacet;
 import org.apache.isis.core.metamodel.facets.collections.modify.CollectionFacet;
 import org.apache.isis.core.metamodel.facets.object.plural.PluralFacet;
 import org.apache.isis.core.metamodel.metamodelvalidator.dflt.MetaModelValidatorDefault;
+import org.apache.isis.core.metamodel.progmodel.ProgrammingModelAbstract.DeprecatedPolicy;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.services.persistsession.PersistenceSessionServiceInternal;
 import org.apache.isis.core.metamodel.spec.ObjectSpecification;
@@ -67,7 +66,6 @@ public abstract class SpecificationLoaderTestAbstract {
     private MessageService mockMessageService;
     
     ServicesInjector stubServicesInjector;
-    IsisConfigurationDefault stubConfiguration;
 
     // is loaded by subclasses
     protected ObjectSpecification specification;
@@ -89,20 +87,15 @@ public abstract class SpecificationLoaderTestAbstract {
 
         }});
 
-        stubConfiguration = new IsisConfigurationDefault(null);
-
-        stubServicesInjector =
-                new ServicesInjector(
-                    _Lists.of(
-                        mockAuthenticationSessionProvider,
-                        stubConfiguration,
-                        mockPersistenceSessionServiceInternal,
-                            mockMessageService,
-                        mockGridService),
-                    stubConfiguration);
+        stubServicesInjector = ServicesInjector.builderForTesting()
+                    .addService(mockAuthenticationSessionProvider)
+                    .addService(mockPersistenceSessionServiceInternal)
+                    .addService(mockMessageService)
+                    .addService(mockGridService)
+                    .build();
 
         specificationLoader = new SpecificationLoader(
-                stubConfiguration, new ProgrammingModelFacetsJava5(stubConfiguration),
+                new ProgrammingModelFacetsJava5(DeprecatedPolicy.HONOUR),
                 new MetaModelValidatorDefault(), stubServicesInjector);
 
         stubServicesInjector.addFallbackIfRequired(SpecificationLoader.class, specificationLoader);
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/testspec/ObjectSpecificationStub.java b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/testspec/ObjectSpecificationStub.java
index 0000da4..01331b9 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/metamodel/testspec/ObjectSpecificationStub.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/metamodel/testspec/ObjectSpecificationStub.java
@@ -26,7 +26,6 @@ import java.util.stream.Stream;
 import org.apache.isis.applib.Identifier;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.commons.exceptions.IsisException;
 import org.apache.isis.core.metamodel.consent.Consent;
 import org.apache.isis.core.metamodel.consent.InteractionInitiatedBy;
@@ -37,8 +36,6 @@ import org.apache.isis.core.metamodel.facets.object.immutable.ImmutableFacet;
 import org.apache.isis.core.metamodel.facets.object.objectspecid.ObjectSpecIdFacet;
 import org.apache.isis.core.metamodel.interactions.ObjectTitleContext;
 import org.apache.isis.core.metamodel.interactions.ObjectValidityContext;
-import org.apache.isis.core.metamodel.services.ServicesInjector;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.apache.isis.core.metamodel.spec.ActionType;
 import org.apache.isis.core.metamodel.spec.ManagedObject;
 import org.apache.isis.core.metamodel.spec.ObjectSpecId;
@@ -60,14 +57,10 @@ public class ObjectSpecificationStub extends FacetHolderImpl implements ObjectSp
      */
     private ObjectSpecId specId;
 
-    private ServicesInjector servicesInjector;
     private ObjectSpecification elementSpecification;
 
     public ObjectSpecificationStub(final Class<?> type) {
         this(type.getName());
-        IsisConfigurationDefault stubConfiguration = new IsisConfigurationDefault(null);
-        this.servicesInjector = new ServicesInjector(Collections.emptyList(), stubConfiguration);
-        servicesInjector.addFallbackIfRequired(ConfigurationServiceInternal.class, stubConfiguration);
     }
 
     @Override
diff --git a/core/metamodel/src/test/java/org/apache/isis/core/runtime/authentication/fixture/LogonFixtureAuthenticatorTest.java b/core/metamodel/src/test/java/org/apache/isis/core/runtime/authentication/fixture/LogonFixtureAuthenticatorTest.java
index 3b9abb7..cfe8964 100644
--- a/core/metamodel/src/test/java/org/apache/isis/core/runtime/authentication/fixture/LogonFixtureAuthenticatorTest.java
+++ b/core/metamodel/src/test/java/org/apache/isis/core/runtime/authentication/fixture/LogonFixtureAuthenticatorTest.java
@@ -27,7 +27,6 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 
 import org.apache.isis.applib.fixtures.LogonFixture;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequestAbstract;
 import org.apache.isis.core.runtime.fixtures.authentication.AuthenticationRequestLogonFixture;
 
@@ -39,7 +38,6 @@ public class LogonFixtureAuthenticatorTest {
 
     private final Mockery mockery = new JUnit4Mockery();
 
-    private IsisConfiguration mockConfiguration;
     private LogonFixtureAuthenticator authenticator;
 
     private AuthenticationRequestLogonFixture logonFixtureRequest;
@@ -54,11 +52,10 @@ public class LogonFixtureAuthenticatorTest {
 
     @Before
     public void setUp() {
-        mockConfiguration = mockery.mock(IsisConfiguration.class);
 
         logonFixtureRequest = new AuthenticationRequestLogonFixture(new LogonFixture("joebloggs"));
         someOtherRequest = new SomeOtherAuthenticationRequest();
-        authenticator = new LogonFixtureAuthenticator(mockConfiguration);
+        authenticator = new LogonFixtureAuthenticator();
     }
 
     @Test
diff --git a/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory4.java b/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory4.java
index f7e5109..3a34b43 100644
--- a/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory4.java
+++ b/core/plugins/jdo-datanucleus-4/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory4.java
@@ -32,10 +32,10 @@ import org.slf4j.LoggerFactory;
 
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.commons.internal.base._Lazy;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.components.ApplicationScopedComponent;
 import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
 import org.apache.isis.core.runtime.persistence.FixturesInstalledFlag;
@@ -67,8 +67,8 @@ PersistenceSessionFactory, ApplicationScopedComponent, FixturesInstalledFlag {
 
     @Programmatic
     @Override
-    public void init(final IsisConfigurationDefault configuration) {
-        this.configuration = configuration;
+    public void init() {
+        this.configuration = _Config.getConfiguration();;
         // need to eagerly build, ... must be completed before catalogNamedQueries().
         // Why? because that method causes entity classes to be loaded which register with DN's EnhancementHelper,
         // which are then cached in DN.  It results in our CreateSchema listener not firing.
diff --git a/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/runtime/system/ObjectMemberAbstractTest.java b/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/runtime/system/ObjectMemberAbstractTest.java
index 1b2c2cc..87848b9 100644
--- a/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/runtime/system/ObjectMemberAbstractTest.java
+++ b/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/runtime/system/ObjectMemberAbstractTest.java
@@ -19,8 +19,6 @@
 
 package org.apache.isis.core.runtime.system;
 
-import org.apache.isis.commons.internal.collections._Lists;
-
 import org.datanucleus.enhancement.Persistable;
 import org.jmock.Expectations;
 import org.jmock.auto.Mock;
@@ -29,9 +27,9 @@ import org.junit.Rule;
 import org.junit.Test;
 
 import org.apache.isis.applib.annotation.Where;
+import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.oid.Oid.Factory;
 import org.apache.isis.core.metamodel.consent.Consent;
@@ -92,7 +90,7 @@ public class ObjectMemberAbstractTest {
     private SpecificationLoader mockSpecificationLoader;
 
     ServicesInjector stubServicesInjector;
-    private IsisConfigurationDefault stubConfiguration;
+    
 
     @Mock
     private ObjectSpecification mockSpecForCustomer;
@@ -104,9 +102,11 @@ public class ObjectMemberAbstractTest {
     public void setUp() throws Exception {
         org.apache.log4j.Logger.getRootLogger().setLevel(org.apache.log4j.Level.OFF);
 
-        stubConfiguration = new IsisConfigurationDefault();
-        stubServicesInjector = new ServicesInjector(_Lists.<Object>of(
-                mockSpecificationLoader, mockSpecificationLoader, mockPersistenceSessionServiceInternal), stubConfiguration);
+        stubServicesInjector = ServicesInjector.builderForTesting()
+                .addServices(_Lists.<Object>of(
+                        mockSpecificationLoader, 
+                        mockPersistenceSessionServiceInternal))
+                .build();
 
         context.checking(new Expectations() {{
             allowing(mockAuthenticationSessionProvider).getAuthenticationSession();
diff --git a/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject.java b/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject.java
index 9e77df3..64b36ed 100644
--- a/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject.java
+++ b/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject.java
@@ -38,8 +38,8 @@ import org.apache.isis.applib.services.wrapper.DisabledException;
 import org.apache.isis.applib.services.wrapper.HiddenException;
 import org.apache.isis.applib.services.wrapper.InvalidException;
 import org.apache.isis.applib.services.wrapper.WrapperFactory;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapterProvider;
 import org.apache.isis.core.metamodel.adapter.oid.Oid.Factory;
@@ -105,10 +105,6 @@ public class WrapperFactoryDefaultTest_wrappedObject {
     private ObjectSpecification mockOnType;
     @Mock
     private SpecificationLoader mockSpecificationLoader;
-    
-    @Mock
-    private IsisConfiguration mockConfiguration;
-
     @Mock
     private IsisSessionFactory mockIsisSessionFactory;
 
@@ -308,9 +304,10 @@ public class WrapperFactoryDefaultTest_wrappedObject {
 
         allowingEmployeeHasSmithAdapter();
 
+        _Config.configurationBuilderForTesting()
+        .put("isis.reflector.facet.filterVisibility", "true");
+        
         context.checking(new Expectations() {{
-            oneOf(mockConfiguration).getBoolean("isis.reflector.facet.filterVisibility", true);
-            will(returnValue(true));
 
             allowing(mockAdapterForStringSmith).getSpecification();
             will(returnValue(mockStringSpec));
@@ -346,6 +343,9 @@ public class WrapperFactoryDefaultTest_wrappedObject {
     public void shouldBeAbleToModifyEnabledPropertyUsingSetter() {
 
         allowingJonesStringValueAdapter();
+        
+        _Config.configurationBuilderForTesting()
+        .put("isis.reflector.facet.filterVisibility", "true");
 
         context.checking(new Expectations() {
             {
@@ -353,9 +353,6 @@ public class WrapperFactoryDefaultTest_wrappedObject {
 
                 ignoring(mockCommand);
 
-                oneOf(mockConfiguration).getBoolean("isis.reflector.facet.filterVisibility", true);
-                will(returnValue(true));
-
                 ignoring(mockStringSpec);
             }
         });
@@ -422,7 +419,7 @@ public class WrapperFactoryDefaultTest_wrappedObject {
             Method init, Method accessor, Method modify, Method clear, Method hide, Method disable, Method validate) {
         FacetedMethod facetedMethod = FacetedMethod.createForProperty(accessor.getDeclaringClass(), accessor);
         FacetUtil.addFacet(new PropertyAccessorFacetViaAccessor(mockOnType, accessor, facetedMethod,
-                mockConfiguration, mockSpecificationLoader,
+                mockSpecificationLoader,
                 mockAuthenticationSessionProvider, mockAdapterManager
         ));
         FacetUtil.addFacet(new PropertyInitializationFacetViaSetterMethod(init, facetedMethod));
diff --git a/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject_transient.java b/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject_transient.java
index 972d474..4ed43d3 100644
--- a/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject_transient.java
+++ b/core/plugins/jdo-datanucleus-4/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject_transient.java
@@ -39,7 +39,6 @@ import org.apache.isis.applib.services.wrapper.events.PropertyModifyEvent;
 import org.apache.isis.applib.services.wrapper.events.PropertyUsabilityEvent;
 import org.apache.isis.applib.services.wrapper.events.PropertyVisibilityEvent;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapterProvider;
 import org.apache.isis.core.metamodel.consent.Allow;
@@ -80,8 +79,6 @@ public class WrapperFactoryDefaultTest_wrappedObject_transient {
     private AuthenticationSessionProvider mockAuthenticationSessionProvider;
     
     @Mock
-    private IsisConfiguration mockConfiguration;
-    @Mock
     private PersistenceSessionServiceInternal mockPersistenceSessionServiceInternal;
     @Mock
     private SpecificationLoader mockSpecificationLoader;
@@ -283,7 +280,7 @@ public class WrapperFactoryDefaultTest_wrappedObject_transient {
 
         // and given
         facets = Arrays.asList((Facet)new PropertyAccessorFacetViaAccessor(mockOnType, getPasswordMethod, mockPasswordMember,
-                mockConfiguration, mockSpecificationLoader,
+                mockSpecificationLoader,
                 mockAuthenticationSessionProvider, mockAdapterManager
         ));
         context.checking(new Expectations() {
diff --git a/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory5.java b/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory5.java
index a08f3d3..91dd95d 100644
--- a/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory5.java
+++ b/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory5.java
@@ -32,10 +32,10 @@ import org.slf4j.LoggerFactory;
 
 import org.apache.isis.applib.annotation.Programmatic;
 import org.apache.isis.commons.internal.base._Lazy;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.components.ApplicationScopedComponent;
 import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
 import org.apache.isis.core.runtime.persistence.FixturesInstalledFlag;
@@ -67,8 +67,8 @@ implements PersistenceSessionFactory, ApplicationScopedComponent, FixturesInstal
     
     @Programmatic
     @Override
-    public void init(final IsisConfigurationDefault configuration) {
-        this.configuration = configuration;
+    public void init() {
+        this.configuration = _Config.getConfiguration();
         // need to eagerly build, ... must be completed before catalogNamedQueries().
         // Why? because that method causes entity classes to be loaded which register with DN's EnhancementHelper,
         // which are then cached in DN.  It results in our CreateSchema listener not firing.
diff --git a/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/plugins/jdo/dn5/IsisJdoSupportPlugin5.java b/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/plugins/jdo/dn5/IsisJdoSupportPlugin5.java
index f16cc88..1282fc9 100644
--- a/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/plugins/jdo/dn5/IsisJdoSupportPlugin5.java
+++ b/core/plugins/jdo-datanucleus-5/src/main/java/org/apache/isis/plugins/jdo/dn5/IsisJdoSupportPlugin5.java
@@ -41,8 +41,8 @@ public class IsisJdoSupportPlugin5 implements IsisJdoMetamodelPlugin, IsisJdoRun
     }
 
     @Override
-    public PersistenceSessionFactory getPersistenceSessionFactory(/*ConfigurationServiceInternal isisConfiguration*/) {
-        return new PersistenceSessionFactory5(/*isisConfiguration*/);
+    public PersistenceSessionFactory getPersistenceSessionFactory() {
+        return new PersistenceSessionFactory5();
     }
 
 }
diff --git a/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/runtime/system/ObjectMemberAbstractTest.java b/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/runtime/system/ObjectMemberAbstractTest.java
index 11fa9c0..d404387 100644
--- a/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/runtime/system/ObjectMemberAbstractTest.java
+++ b/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/runtime/system/ObjectMemberAbstractTest.java
@@ -19,15 +19,6 @@
 
 package org.apache.isis.core.runtime.system;
 
-import static org.hamcrest.Matchers.equalTo;
-import static org.hamcrest.Matchers.is;
-import static org.hamcrest.Matchers.isEmptyString;
-import static org.hamcrest.Matchers.not;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertThat;
-import static org.junit.Assert.assertTrue;
-
 import org.datanucleus.enhancement.Persistable;
 import org.jmock.Expectations;
 import org.jmock.auto.Mock;
@@ -39,7 +30,6 @@ import org.apache.isis.applib.annotation.Where;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.consent.Consent;
 import org.apache.isis.core.metamodel.consent.InteractionInitiatedBy;
@@ -69,6 +59,15 @@ import org.apache.isis.core.runtime.persistence.objectstore.transaction.PojoAdap
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
 
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.isEmptyString;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
 public class ObjectMemberAbstractTest {
 
     @Rule
@@ -89,7 +88,6 @@ public class ObjectMemberAbstractTest {
     private SpecificationLoader mockSpecificationLoader;
 
     ServicesInjector stubServicesInjector;
-    private IsisConfigurationDefault stubConfiguration;
 
     @Mock
     private ObjectSpecification mockSpecForCustomer;
@@ -101,9 +99,11 @@ public class ObjectMemberAbstractTest {
     public void setUp() throws Exception {
         org.apache.log4j.Logger.getRootLogger().setLevel(org.apache.log4j.Level.OFF);
 
-        stubConfiguration = new IsisConfigurationDefault();
-        stubServicesInjector = new ServicesInjector(_Lists.<Object>of(
-                mockSpecificationLoader, mockSpecificationLoader, mockPersistenceSessionServiceInternal), stubConfiguration);
+        stubServicesInjector = ServicesInjector.builderForTesting()
+                .addServices(_Lists.<Object>of(
+                        mockSpecificationLoader, 
+                        mockPersistenceSessionServiceInternal))
+                .build(); 
 
         context.checking(new Expectations() {{
             allowing(mockAuthenticationSessionProvider).getAuthenticationSession();
diff --git a/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject.java b/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject.java
index 90fb60a..ad88e83 100644
--- a/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject.java
+++ b/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject.java
@@ -38,8 +38,8 @@ import org.apache.isis.applib.services.wrapper.DisabledException;
 import org.apache.isis.applib.services.wrapper.HiddenException;
 import org.apache.isis.applib.services.wrapper.InvalidException;
 import org.apache.isis.applib.services.wrapper.WrapperFactory;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapterProvider;
 import org.apache.isis.core.metamodel.adapter.oid.Oid.Factory;
@@ -105,8 +105,6 @@ public class WrapperFactoryDefaultTest_wrappedObject {
     private ObjectSpecification mockOnType;
     @Mock
     private SpecificationLoader mockSpecificationLoader;
-    @Mock
-    private IsisConfiguration mockConfiguration;
 
     @Mock
     private IsisSessionFactory mockIsisSessionFactory;
@@ -306,10 +304,11 @@ public class WrapperFactoryDefaultTest_wrappedObject {
     public void shouldBeAbleToReadVisibleProperty() {
 
         allowingEmployeeHasSmithAdapter();
+        
+        _Config.configurationBuilderForTesting()
+        .put("isis.reflector.facet.filterVisibility", "true");
 
         context.checking(new Expectations() {{
-            oneOf(mockConfiguration).getBoolean("isis.reflector.facet.filterVisibility", true);
-            will(returnValue(true));
 
             allowing(mockAdapterForStringSmith).getSpecification();
             will(returnValue(mockStringSpec));
@@ -345,6 +344,9 @@ public class WrapperFactoryDefaultTest_wrappedObject {
     public void shouldBeAbleToModifyEnabledPropertyUsingSetter() {
 
         allowingJonesStringValueAdapter();
+        
+        _Config.configurationBuilderForTesting()
+        .put("isis.reflector.facet.filterVisibility", "true");
 
         context.checking(new Expectations() {
             {
@@ -352,9 +354,6 @@ public class WrapperFactoryDefaultTest_wrappedObject {
 
                 ignoring(mockCommand);
 
-                oneOf(mockConfiguration).getBoolean("isis.reflector.facet.filterVisibility", true);
-                will(returnValue(true));
-
                 ignoring(mockStringSpec);
             }
         });
@@ -421,7 +420,7 @@ public class WrapperFactoryDefaultTest_wrappedObject {
             Method init, Method accessor, Method modify, Method clear, Method hide, Method disable, Method validate) {
         FacetedMethod facetedMethod = FacetedMethod.createForProperty(accessor.getDeclaringClass(), accessor);
         FacetUtil.addFacet(new PropertyAccessorFacetViaAccessor(mockOnType, accessor, facetedMethod,
-                mockConfiguration, mockSpecificationLoader,
+                mockSpecificationLoader,
                 mockAuthenticationSessionProvider, mockAdapterManager
         ));
         FacetUtil.addFacet(new PropertyInitializationFacetViaSetterMethod(init, facetedMethod));
diff --git a/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject_transient.java b/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject_transient.java
index 50b93ba..82e240b 100644
--- a/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject_transient.java
+++ b/core/plugins/jdo-datanucleus-5/src/test/java/org/apache/isis/core/wrapper/WrapperFactoryDefaultTest_wrappedObject_transient.java
@@ -79,8 +79,6 @@ public class WrapperFactoryDefaultTest_wrappedObject_transient {
     @Mock
     private AuthenticationSessionProvider mockAuthenticationSessionProvider;
     @Mock
-    private IsisConfiguration mockConfiguration;
-    @Mock
     private PersistenceSessionServiceInternal mockPersistenceSessionServiceInternal;
     @Mock
     private SpecificationLoader mockSpecificationLoader;
@@ -282,7 +280,7 @@ public class WrapperFactoryDefaultTest_wrappedObject_transient {
 
         // and given
         facets = Arrays.asList((Facet)new PropertyAccessorFacetViaAccessor(mockOnType, getPasswordMethod, mockPasswordMember,
-                mockConfiguration, mockSpecificationLoader,
+                mockSpecificationLoader,
                 mockAuthenticationSessionProvider, mockAdapterManager
         ));
         context.checking(new Expectations() {
diff --git a/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizor.java b/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizor.java
index 254a601..5df10b2 100644
--- a/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizor.java
+++ b/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizor.java
@@ -45,8 +45,8 @@ import org.slf4j.LoggerFactory;
 
 import org.apache.isis.applib.Identifier;
 import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationManagerInstaller;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequestPassword;
@@ -73,22 +73,14 @@ public class ShiroAuthenticatorOrAuthorizor implements Authenticator, Authorizor
     private static final boolean ISIS_AUTHENTICATION_SHIRO_AUTO_LOGOUT_DEFAULT = false;
 
     // -- constructor and fields
-    private final IsisConfiguration configuration;
     private final boolean autoLogout;
 
-    public ShiroAuthenticatorOrAuthorizor(final IsisConfiguration configuration) {
-        this.configuration = configuration;
-        autoLogout = configuration.getBoolean(
+    public ShiroAuthenticatorOrAuthorizor() {
+        autoLogout = _Config.getConfiguration().getBoolean(
                 ISIS_AUTHENTICATION_SHIRO_AUTO_LOGOUT_KEY,
                 ISIS_AUTHENTICATION_SHIRO_AUTO_LOGOUT_DEFAULT);
     }
 
-    public IsisConfiguration getConfiguration() {
-        return configuration;
-    }
-
-
-
     // -- init, shutdown
 
     @Override
diff --git a/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/authentication/ShiroAuthenticationManagerInstaller.java b/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/authentication/ShiroAuthenticationManagerInstaller.java
index 977a730..5949e3f 100644
--- a/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/authentication/ShiroAuthenticationManagerInstaller.java
+++ b/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/authentication/ShiroAuthenticationManagerInstaller.java
@@ -21,7 +21,6 @@ package org.apache.isis.security.shiro.authentication;
 import java.util.List;
 
 import org.apache.isis.commons.internal.collections._Lists;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.runtime.authentication.AuthenticationManagerStandardInstallerAbstractForDfltRuntime;
 import org.apache.isis.core.runtime.authentication.standard.Authenticator;
 import org.apache.isis.security.shiro.ShiroAuthenticatorOrAuthorizor;
@@ -31,12 +30,12 @@ extends AuthenticationManagerStandardInstallerAbstractForDfltRuntime {
 
     public static String NAME = "shiro";
 
-    public ShiroAuthenticationManagerInstaller(final IsisConfigurationDefault isisConfiguration) {
-        super(NAME, isisConfiguration);
+    public ShiroAuthenticationManagerInstaller() {
+        super(NAME);
     }
 
     @Override
     protected List<Authenticator> createAuthenticators() {
-        return _Lists.<Authenticator> of(new ShiroAuthenticatorOrAuthorizor(getConfiguration()));
+        return _Lists.<Authenticator> of(new ShiroAuthenticatorOrAuthorizor());
     }
 }
diff --git a/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/authorization/ShiroAuthorizationManagerInstaller.java b/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/authorization/ShiroAuthorizationManagerInstaller.java
index f8df59d..9e2a7ac 100644
--- a/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/authorization/ShiroAuthorizationManagerInstaller.java
+++ b/core/plugins/security-shiro/src/main/java/org/apache/isis/security/shiro/authorization/ShiroAuthorizationManagerInstaller.java
@@ -18,7 +18,6 @@
  */
 package org.apache.isis.security.shiro.authorization;
 
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.runtime.authorization.standard.AuthorizationManagerStandardInstallerAbstract;
 import org.apache.isis.core.runtime.authorization.standard.Authorizor;
 import org.apache.isis.security.shiro.ShiroAuthenticatorOrAuthorizor;
@@ -27,13 +26,13 @@ public class ShiroAuthorizationManagerInstaller extends AuthorizationManagerStan
 
     public static String NAME = "shiro";
 
-    public ShiroAuthorizationManagerInstaller(final IsisConfigurationDefault isisConfiguration) {
-        super(NAME, isisConfiguration);
+    public ShiroAuthorizationManagerInstaller() {
+        super(NAME);
     }
 
     @Override
     protected Authorizor createAuthorizor() {
-        return new ShiroAuthenticatorOrAuthorizor(getConfiguration());
+        return new ShiroAuthenticatorOrAuthorizor();
     }
 
 }
diff --git a/core/plugins/security-shiro/src/test/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizorTest_authenticate.java b/core/plugins/security-shiro/src/test/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizorTest_authenticate.java
index bf69cac..0e38806 100644
--- a/core/plugins/security-shiro/src/test/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizorTest_authenticate.java
+++ b/core/plugins/security-shiro/src/test/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizorTest_authenticate.java
@@ -24,16 +24,15 @@ import org.apache.shiro.mgt.SecurityManager;
 import org.apache.shiro.subject.Subject;
 import org.apache.shiro.util.Factory;
 import org.apache.shiro.util.ThreadContext;
-import org.jmock.Expectations;
-import org.jmock.auto.Mock;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 
 import org.apache.isis.applib.Identifier;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
-import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequestPassword;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
@@ -49,22 +48,17 @@ public class ShiroAuthenticatorOrAuthorizorTest_authenticate {
     @Rule
     public JUnitRuleMockery2 context = JUnitRuleMockery2.createFor(Mode.INTERFACES_AND_CLASSES);
 
-    @Mock
-    private IsisConfiguration mockConfiguration;
-
     private ShiroAuthenticatorOrAuthorizor authOrAuth;
 
     @Before
     public void setUp() throws Exception {
         
         // PRODUCTION
-        
-    	context.checking(new Expectations() {{
-            allowing(mockConfiguration).getBoolean("isis.authentication.shiro.autoLogoutIfAlreadyAuthenticated", false);
-            will(returnValue(false));
-        }});
+
+        IsisConfigurationBuilder configBuilder = _Config.configurationBuilderForTesting();
+        configBuilder.add("isis.authentication.shiro.autoLogoutIfAlreadyAuthenticated", "false");
     	
-   		authOrAuth = new ShiroAuthenticatorOrAuthorizor(mockConfiguration);
+   		authOrAuth = new ShiroAuthenticatorOrAuthorizor();
     	authOrAuth.init();
     }
 
diff --git a/core/plugins/security-shiro/src/test/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizorTest_isVisibleInAnyRole.java b/core/plugins/security-shiro/src/test/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizorTest_isVisibleInAnyRole.java
index d1965a7..49f5910 100644
--- a/core/plugins/security-shiro/src/test/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizorTest_isVisibleInAnyRole.java
+++ b/core/plugins/security-shiro/src/test/java/org/apache/isis/security/shiro/ShiroAuthenticatorOrAuthorizorTest_isVisibleInAnyRole.java
@@ -24,7 +24,6 @@ import org.apache.shiro.mgt.SecurityManager;
 import org.apache.shiro.subject.Subject;
 import org.apache.shiro.util.Factory;
 import org.apache.shiro.util.ThreadContext;
-import org.jmock.Expectations;
 import org.jmock.auto.Mock;
 import org.junit.After;
 import org.junit.Before;
@@ -32,7 +31,9 @@ import org.junit.Rule;
 import org.junit.Test;
 
 import org.apache.isis.applib.Identifier;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequestPassword;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
@@ -56,12 +57,10 @@ public class ShiroAuthenticatorOrAuthorizorTest_isVisibleInAnyRole {
     	
         // PRODUCTION
         
-    	context.checking(new Expectations() {{
-            allowing(mockConfiguration).getBoolean("isis.authentication.shiro.autoLogoutIfAlreadyAuthenticated", false);
-            will(returnValue(false));
-        }});
+        IsisConfigurationBuilder configBuilder = _Config.configurationBuilderForTesting();
+        configBuilder.add("isis.authentication.shiro.autoLogoutIfAlreadyAuthenticated", "false");
     	
-        authOrAuth = new ShiroAuthenticatorOrAuthorizor(mockConfiguration);
+        authOrAuth = new ShiroAuthenticatorOrAuthorizor();
         authOrAuth.init();
     }
 
diff --git a/core/pom.xml b/core/pom.xml
index fe16668..d3a4a96 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -1207,6 +1207,22 @@ ${license.additional-notes}
                 <type>test-jar</type>
                 <scope>test</scope>
             </dependency>
+            
+            <!-- config -->
+            <dependency>
+                <groupId>org.apache.isis.core</groupId>
+                <artifactId>isis-core-config</artifactId>
+                <version>${project.version}</version>
+                <type>jar</type>
+                <scope>compile</scope>
+            </dependency>
+            <dependency>
+                <groupId>org.apache.isis.core</groupId>
+                <artifactId>isis-core-config</artifactId>
+                <version>${project.version}</version>
+                <type>test-jar</type>
+                <scope>test</scope>
+            </dependency>
 	        
             <!-- provides @Nullable -->
             <dependency>
@@ -2101,9 +2117,9 @@ ${license.additional-notes}
         </profile>
 
         <profile>
-            <id>jdk10plus</id>
+            <id>jdk11plus</id>
             <activation>
-                <jdk>[10,)</jdk>
+                <jdk>[11,)</jdk>
             </activation>
             <build>
                 <plugins>
@@ -2114,8 +2130,8 @@ ${license.additional-notes}
                         <configuration>
                             <showDeprecation>true</showDeprecation>
                             <showWarnings>true</showWarnings>
-                            <source>10</source>
-                            <target>10</target>
+                            <source>11</source>
+                            <target>11</target>
                             <!-- TODO on build WARNING: __add-opens has no effect at compile time -->
                             <compilerArgs>
                                 <arg>--add-opens</arg>
@@ -2429,6 +2445,7 @@ ${license.additional-notes}
     <modules>
         <module>schema</module>
         <module>commons</module>
+        <module>config</module>
         <module>applib</module>
         <module>log4j</module>
         <module>metamodel</module>
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/authentication/AuthenticationManagerStandardInstallerAbstractForDfltRuntime.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/authentication/AuthenticationManagerStandardInstallerAbstractForDfltRuntime.java
index 4cb11b2..1a14c12 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/authentication/AuthenticationManagerStandardInstallerAbstractForDfltRuntime.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/authentication/AuthenticationManagerStandardInstallerAbstractForDfltRuntime.java
@@ -20,8 +20,6 @@
 package org.apache.isis.core.runtime.authentication;
 
 import org.apache.isis.applib.fixtures.LogonFixture;
-import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.runtime.authentication.fixture.LogonFixtureAuthenticator;
 import org.apache.isis.core.runtime.authentication.standard.AuthenticationManagerStandard;
 import org.apache.isis.core.runtime.authentication.standard.AuthenticationManagerStandardInstallerAbstract;
@@ -29,10 +27,8 @@ import org.apache.isis.core.runtime.authentication.standard.AuthenticationManage
 public abstract class AuthenticationManagerStandardInstallerAbstractForDfltRuntime extends AuthenticationManagerStandardInstallerAbstract {
 
 
-    public AuthenticationManagerStandardInstallerAbstractForDfltRuntime(
-            final String name,
-            final IsisConfigurationDefault isisConfiguration) {
-        super(name, isisConfiguration);
+    public AuthenticationManagerStandardInstallerAbstractForDfltRuntime(final String name) {
+        super(name);
     }
 
     /**
@@ -48,12 +44,11 @@ public abstract class AuthenticationManagerStandardInstallerAbstractForDfltRunti
      */
     @Override
     protected AuthenticationManagerStandard createAuthenticationManagerStandard() {
-        final IsisConfiguration configuration = getConfiguration();
-
-        final AuthenticationManagerStandard authenticationManager = new AuthenticationManagerStandard(configuration);
+        
+        final AuthenticationManagerStandard authenticationManager = new AuthenticationManagerStandard();
 
         // we add to start to ensure that these special case authenticators are always consulted first
-        authenticationManager.addAuthenticatorToStart(new LogonFixtureAuthenticator(configuration));
+        authenticationManager.addAuthenticatorToStart(new LogonFixtureAuthenticator());
 
         return authenticationManager;
     }
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/headless/IsisComponentProviderDefault.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/headless/IsisComponentProviderDefault.java
index 4631d78..d62f00b 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/headless/IsisComponentProviderDefault.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/headless/IsisComponentProviderDefault.java
@@ -21,14 +21,15 @@ package org.apache.isis.core.runtime.headless;
 
 import org.apache.isis.applib.AppManifest;
 import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.runtime.systemusinginstallers.IsisComponentProviderDefault2;
 
 public class IsisComponentProviderDefault extends IsisComponentProviderDefault2 {
 
     public IsisComponentProviderDefault(
             final AppManifest appManifestIfAny,
-            final IsisConfiguration configurationOverride) {
-        super(appManifestIfAny, configurationOverride);
+            final IsisConfigurationBuilder configurationBuilder) {
+        super(appManifestIfAny, configurationBuilder);
 
     }
 }
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/headless/IsisSystem.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/headless/IsisSystem.java
index 3ac871a..adcba64 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/headless/IsisSystem.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/headless/IsisSystem.java
@@ -27,7 +27,7 @@ import org.apache.isis.applib.fixtures.FixtureClock;
 import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelInvalidException;
 import org.apache.isis.core.runtime.authentication.AuthenticationManager;
@@ -77,12 +77,12 @@ public class IsisSystem {
 
         protected AuthenticationRequest authenticationRequest = new AuthenticationRequestNameOnly("tester");
 
-        protected IsisConfigurationDefault configuration = new IsisConfigurationDefault();
+        protected IsisConfigurationBuilder configurationBuilder = new IsisConfigurationBuilder();
 
         protected AppManifest appManifestIfAny;
 
-        public T with(IsisConfiguration configuration) {
-            this.configuration = (IsisConfigurationDefault) configuration;
+        public T with(IsisConfigurationBuilder configurationBuilder) {
+            this.configurationBuilder = configurationBuilder;
             return uncheckedCast(this);
         }
 
@@ -100,7 +100,7 @@ public class IsisSystem {
             final IsisSystem isisSystem =
                     new IsisSystem(
                             appManifestIfAny,
-                            configuration,
+                            configurationBuilder,
                             authenticationRequest);
             return configure(uncheckedCast(isisSystem));
         }
@@ -138,7 +138,7 @@ public class IsisSystem {
 
     // these fields 'xxxForComponentProvider' are used to initialize the IsisComponentProvider, but shouldn't be used thereafter.
     protected final AppManifest appManifestIfAny;
-    protected final IsisConfiguration configurationOverride;
+    protected final IsisConfigurationBuilder configurationBuilder;
 
     protected final AuthenticationRequest authenticationRequestIfAny;
     protected AuthenticationSession authenticationSession;
@@ -146,10 +146,10 @@ public class IsisSystem {
 
     protected IsisSystem(
             final AppManifest appManifestIfAny,
-            final IsisConfiguration configurationOverride,
+            final IsisConfigurationBuilder configurationBuilder,
             final AuthenticationRequest authenticationRequestIfAny) {
         this.appManifestIfAny = appManifestIfAny;
-        this.configurationOverride = configurationOverride;
+        this.configurationBuilder = configurationBuilder;
         this.authenticationRequestIfAny = authenticationRequestIfAny;
     }
 
@@ -182,10 +182,10 @@ public class IsisSystem {
         if(firstTime) {
             componentProvider = new IsisComponentProviderDefault(
                     appManifestIfAny,
-                    configurationOverride
+                    configurationBuilder
                     );
             
-            IsisContext.EnvironmentPrimer.primeEnvironment(configurationOverride);
+            IsisContext.EnvironmentPrimer.primeEnvironment(configurationBuilder);
 
             final IsisSessionFactoryBuilder isisSessionFactoryBuilder = 
                     new IsisSessionFactoryBuilder(componentProvider, appManifestIfAny);
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/runner/opts/OptionHandlerConfiguration.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/runner/opts/OptionHandlerConfiguration.java
index 1405504..c6602bd 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/runner/opts/OptionHandlerConfiguration.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/runner/opts/OptionHandlerConfiguration.java
@@ -19,21 +19,21 @@
 
 package org.apache.isis.core.runtime.runner.opts;
 
-import static org.apache.isis.core.runtime.runner.Constants.CONFIGURATION_LONG_OPT;
-import static org.apache.isis.core.runtime.runner.Constants.CONFIGURATION_OPT;
-
 import org.apache.commons.cli.CommandLine;
 import org.apache.commons.cli.Option;
 import org.apache.commons.cli.OptionBuilder;
 import org.apache.commons.cli.Options;
 
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.config.NotFoundPolicy;
 import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.runtime.optionhandler.BootPrinter;
 import org.apache.isis.core.runtime.optionhandler.OptionHandlerAbstract;
 import org.apache.isis.core.runtime.runner.Constants;
 
+import static org.apache.isis.core.runtime.runner.Constants.CONFIGURATION_LONG_OPT;
+import static org.apache.isis.core.runtime.runner.Constants.CONFIGURATION_OPT;
+
 public class OptionHandlerConfiguration extends OptionHandlerAbstract {
 
     private String configurationResource;
@@ -56,7 +56,10 @@ public class OptionHandlerConfiguration extends OptionHandlerAbstract {
         if (configurationResource == null) {
             return;
         }
-        isisConfigurationBuilder.addConfigurationResource(configurationResource, NotFoundPolicy.FAIL_FAST, IsisConfigurationDefault.ContainsPolicy.IGNORE);
+        isisConfigurationBuilder.addConfigurationResource(
+                configurationResource, 
+                NotFoundPolicy.FAIL_FAST, 
+                IsisConfiguration.ContainsPolicy.IGNORE);
     }
 
 }
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServiceInstantiator.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServiceInstantiator.java
index 10c4580..675aae3 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServiceInstantiator.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServiceInstantiator.java
@@ -34,7 +34,6 @@ import org.slf4j.LoggerFactory;
 import org.apache.isis.commons.internal.collections._Maps;
 import org.apache.isis.commons.internal.collections._Sets;
 import org.apache.isis.commons.internal.context._Context;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.factory.InstanceCreationClassException;
 import org.apache.isis.core.commons.factory.InstanceCreationException;
 import org.apache.isis.core.commons.lang.ArrayExtensions;
@@ -79,21 +78,21 @@ public final class ServiceInstantiator {
 
     // //////////////////////////////////////
 
-
-    /**
-     * initially null, but checked before first use that has been set (through {@link #setConfiguration(org.apache.isis.core.commons.config.IsisConfiguration)}).
-     */
-    private Map<String, String> props;
-
-    public void setConfiguration(IsisConfiguration configuration) {
-        this.props = configuration.asMap();
-    }
-
-    private void ensureInitialized() {
-        if(props == null) {
-            throw new IllegalStateException("IsisConfiguration properties not set on ServiceInstantiator prior to first-use");
-        }
-    }
+//TODO[2039]
+//    /**
+//     * initially null, but checked before first use that has been set (through {@link #setConfiguration(org.apache.isis.core.commons.config.IsisConfiguration)}).
+//     */
+//    private Map<String, String> props;
+//
+//    public void setConfiguration(IsisConfiguration configuration) {
+//        this.props = configuration.asMap();
+//    }
+//
+//    private void ensureInitialized() {
+//        if(props == null) {
+//            throw new IllegalStateException("IsisConfiguration properties not set on ServiceInstantiator prior to first-use");
+//        }
+//    }
 
     // //////////////////////////////////////
 
@@ -119,7 +118,6 @@ public final class ServiceInstantiator {
     // //////////////////////////////////////
 
     public <T> T createInstance(final Class<T> cls) {
-        ensureInitialized();
         if(cls.isAnnotationPresent(RequestScoped.class)) {
             return instantiateRequestScopedProxy(cls);
         } else {
@@ -241,7 +239,8 @@ public final class ServiceInstantiator {
         if(numParams == 0) {
             MethodExtensions.invoke(postConstructMethod, service);
         } else {
-            MethodExtensions.invoke(postConstructMethod, service, new Object[]{props});
+            //TODO[2039] MethodExtensions.invoke(postConstructMethod, service, new Object[]{props});
+            throw new UnsupportedOperationException("post-construct methods must not take any arguments");
         }
     }
 
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerAbstract.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerAbstract.java
index ff4e0e2..10b448f 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerAbstract.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerAbstract.java
@@ -20,14 +20,11 @@
 package org.apache.isis.core.runtime.services;
 
 import org.apache.isis.core.commons.components.InstallerAbstract;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 
 public abstract class ServicesInstallerAbstract extends InstallerAbstract implements ServicesInstaller {
 
-    public ServicesInstallerAbstract(
-            final String name,
-            final IsisConfigurationDefault isisConfiguration) {
-        super(name, isisConfiguration);
+    public ServicesInstallerAbstract(final String name) {
+        super(name);
     }
 
 }
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromAnnotation.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromAnnotation.java
index 67daafc..2bd00cc 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromAnnotation.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromAnnotation.java
@@ -36,7 +36,8 @@ import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.commons.internal.collections._Maps;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.config.internal._Config;
+import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facets.object.domainservice.DomainServiceMenuOrder;
 import org.apache.isis.core.metamodel.util.DeweyOrderComparator;
 import org.apache.isis.core.plugins.classdiscovery.ClassDiscovery;
@@ -71,14 +72,12 @@ public class ServicesInstallerFromAnnotation extends ServicesInstallerAbstract {
 
     private final ServiceInstantiator serviceInstantiator;
 
-    public ServicesInstallerFromAnnotation(final IsisConfigurationDefault isisConfiguration) {
-        this(new ServiceInstantiator(), isisConfiguration);
+    public ServicesInstallerFromAnnotation() {
+        this(new ServiceInstantiator());
     }
 
-    public ServicesInstallerFromAnnotation(
-            final ServiceInstantiator serviceInstantiator,
-            final IsisConfigurationDefault isisConfiguration) {
-        super(NAME, isisConfiguration);
+    public ServicesInstallerFromAnnotation(final ServiceInstantiator serviceInstantiator) {
+        super(NAME);
         this.serviceInstantiator = serviceInstantiator;
     }
 
@@ -112,17 +111,13 @@ public class ServicesInstallerFromAnnotation extends ServicesInstallerAbstract {
             return;
         }
 
-        if(getConfiguration() == null) {
-            throw new IllegalStateException("No IsisConfiguration injected - aborting");
-        }
+        final IsisConfiguration configuration = _Config.getConfigurationElseThrow();
+        
         try {
 
-            // lazily copy over the configuration to the instantiator
-            serviceInstantiator.setConfiguration(getConfiguration());
-
             if(packagePrefixes == null) {
                 this.packagePrefixes = PACKAGE_PREFIX_STANDARD;
-                String packagePrefixes = getConfiguration().getString(PACKAGE_PREFIX_KEY);
+                String packagePrefixes = configuration.getString(PACKAGE_PREFIX_KEY);
                 if(!_Strings.isNullOrEmpty(packagePrefixes)) {
                     this.packagePrefixes = this.packagePrefixes + "," + packagePrefixes;
                 }
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromConfiguration.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromConfiguration.java
index cfa7960..f37d3f9 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromConfiguration.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromConfiguration.java
@@ -30,8 +30,8 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.config.ConfigurationConstants;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.util.DeweyOrderComparator;
 
 public class ServicesInstallerFromConfiguration extends ServicesInstallerAbstract  {
@@ -47,14 +47,12 @@ public class ServicesInstallerFromConfiguration extends ServicesInstallerAbstrac
 
     private final ServiceInstantiator serviceInstantiator;
 
-    public ServicesInstallerFromConfiguration(final IsisConfigurationDefault isisConfiguration) {
-        this(new ServiceInstantiator(), isisConfiguration);
+    public ServicesInstallerFromConfiguration() {
+        this(new ServiceInstantiator());
     }
 
-    ServicesInstallerFromConfiguration(
-            final ServiceInstantiator serviceInstantiator,
-            final IsisConfigurationDefault isisConfiguration) {
-        super(NAME, isisConfiguration);
+    ServicesInstallerFromConfiguration(final ServiceInstantiator serviceInstantiator) {
+        super(NAME);
         this.serviceInstantiator = serviceInstantiator;
     }
 
@@ -72,11 +70,9 @@ public class ServicesInstallerFromConfiguration extends ServicesInstallerAbstrac
         if(initialized) {
             return;
         }
-
         try {
-            // lazily copy over the configuration to the instantiator
-            serviceInstantiator.setConfiguration(getConfiguration());
-
+            // ensure we have a config
+            _Config.getConfigurationElseThrow();
         } finally {
             initialized = true;
         }
@@ -91,9 +87,6 @@ public class ServicesInstallerFromConfiguration extends ServicesInstallerAbstrac
     public List<Object> getServices() {
         LOG.info("installing {}", this.getClass().getName());
 
-        // rather nasty, lazily copy over the configuration to the instantiator
-        serviceInstantiator.setConfiguration(getConfiguration());
-
         if(serviceList == null) {
 
             final SortedMap<String, SortedSet<String>> positionedServices = _Maps.newTreeMap(new DeweyOrderComparator());
@@ -116,7 +109,7 @@ public class ServicesInstallerFromConfiguration extends ServicesInstallerAbstrac
     private void appendConfiguredServices(
             final SortedMap<String, SortedSet<String>> positionedServices) {
 
-        final String configuredServices = getConfiguration().getString(SERVICES_KEY);
+        final String configuredServices = _Config.getConfigurationElseThrow().getString(SERVICES_KEY);
         if (configuredServices == null) {
             return;
         }
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromConfigurationAndAnnotation.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromConfigurationAndAnnotation.java
index f1315a5..c017ce4 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromConfigurationAndAnnotation.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/services/ServicesInstallerFromConfigurationAndAnnotation.java
@@ -27,7 +27,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import org.apache.isis.commons.internal.collections._Maps;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.util.DeweyOrderComparator;
 
 public class ServicesInstallerFromConfigurationAndAnnotation extends ServicesInstallerAbstract  {
@@ -41,19 +40,17 @@ public class ServicesInstallerFromConfigurationAndAnnotation extends ServicesIns
     private final ServicesInstallerFromAnnotation servicesInstallerFromAnnotation;
 
 
-    public ServicesInstallerFromConfigurationAndAnnotation(final IsisConfigurationDefault isisConfiguration) {
-        this(new ServiceInstantiator(), isisConfiguration);
+    public ServicesInstallerFromConfigurationAndAnnotation() {
+        this(new ServiceInstantiator());
     }
 
     public ServicesInstallerFromConfigurationAndAnnotation(
-            final ServiceInstantiator serviceInstantiator,
-            final IsisConfigurationDefault isisConfiguration) {
-        super(NAME, isisConfiguration);
+            final ServiceInstantiator serviceInstantiator) {
+        super(NAME);
 
         this.serviceInstantiator = serviceInstantiator;
-        servicesInstallerFromConfiguration = new ServicesInstallerFromConfiguration(serviceInstantiator,
-                isisConfiguration);
-        servicesInstallerFromAnnotation = new ServicesInstallerFromAnnotation(serviceInstantiator, isisConfiguration);
+        servicesInstallerFromConfiguration = new ServicesInstallerFromConfiguration(serviceInstantiator);
+        servicesInstallerFromAnnotation = new ServicesInstallerFromAnnotation(serviceInstantiator);
     }
 
 
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/context/IsisContext.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/context/IsisContext.java
index c233482..85c7c39 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/context/IsisContext.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/context/IsisContext.java
@@ -28,6 +28,7 @@ import java.util.function.Supplier;
 import org.apache.isis.commons.internal.base._Strings;
 import org.apache.isis.commons.internal.context._Context;
 import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelInvalidException;
@@ -113,9 +114,9 @@ public interface IsisContext {
         }
         
         @Deprecated
-        public static void primeEnvironment(IsisConfiguration configurationOverride) {
+        public static void primeEnvironment(IsisConfigurationBuilder configurationBuilder) {
             
-            final String deploymentTypeLiteral = configurationOverride.getString("isis.deploymentType");
+            final String deploymentTypeLiteral = configurationBuilder.peekAtString("isis.deploymentType");
             if(_Strings.isNullOrEmpty(deploymentTypeLiteral)) {
                 return; // do nothing
             }
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionBase.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionBase.java
index 6434e65..3cec1ca 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionBase.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionBase.java
@@ -34,6 +34,7 @@ import org.apache.isis.applib.services.iactn.InteractionContext;
 import org.apache.isis.applib.services.metrics.MetricsService;
 import org.apache.isis.applib.services.user.UserService;
 import org.apache.isis.commons.internal.collections._Maps;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.util.ToString;
@@ -118,7 +119,7 @@ abstract class PersistenceSessionBase implements PersistenceSession {
         this.fixturesInstalledFlag = fixturesInstalledFlag;
 
         // injected
-        this.configuration = servicesInjector.getConfigurationServiceInternal();
+        this.configuration = _Config.getConfiguration();
         this.specificationLoader = servicesInjector.getSpecificationLoader();
         this.authenticationSession = authenticationSession;
 
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory.java
index 37a6cf8..12bbfaa 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactory.java
@@ -17,7 +17,6 @@
 package org.apache.isis.core.runtime.system.persistence;
 
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.IsisJdoRuntimePlugin;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
@@ -29,7 +28,7 @@ public interface PersistenceSessionFactory {
     PersistenceSession createPersistenceSession(ServicesInjector servicesInjector,
             AuthenticationSession authenticationSession);
 
-    void init(IsisConfigurationDefault configuration);
+    void init();
 
     void catalogNamedQueries(final SpecificationLoader specificationLoader);
 
@@ -39,8 +38,8 @@ public interface PersistenceSessionFactory {
 
     // -- FACTORY
 
-    static PersistenceSessionFactory of(/*ConfigurationServiceInternal configuration*/) {
-        return IsisJdoRuntimePlugin.get().getPersistenceSessionFactory(/*configuration*/);
+    static PersistenceSessionFactory get() {
+        return IsisJdoRuntimePlugin.get().getPersistenceSessionFactory();
     }
 
 
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactoryMetamodelRefiner.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactoryMetamodelRefiner.java
index 7c6108e..b71f753 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactoryMetamodelRefiner.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/persistence/PersistenceSessionFactoryMetamodelRefiner.java
@@ -18,7 +18,6 @@
  */
 package org.apache.isis.core.runtime.system.persistence;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.metamodel.facetapi.MetaModelRefiner;
 import org.apache.isis.core.metamodel.progmodel.ProgrammingModel;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelValidatorComposite;
@@ -39,7 +38,7 @@ import org.apache.isis.objectstore.jdo.metamodel.specloader.validator.JdoMetaMod
 public class PersistenceSessionFactoryMetamodelRefiner implements MetaModelRefiner {
 
     @Override
-    public void refineProgrammingModel(ProgrammingModel programmingModel, IsisConfiguration configuration) {
+    public void refineProgrammingModel(ProgrammingModel programmingModel) {
         programmingModel.addFactory(
                 new JdoPersistenceCapableAnnotationFacetFactory(), ProgrammingModel.Position.BEGINNING);
         programmingModel.addFactory(new JdoDatastoreIdentityAnnotationFacetFactory());
@@ -61,8 +60,7 @@ public class PersistenceSessionFactoryMetamodelRefiner implements MetaModelRefin
 
     @Override
     public void refineMetaModelValidator(
-            MetaModelValidatorComposite metaModelValidator,
-            IsisConfiguration configuration) {
+            MetaModelValidatorComposite metaModelValidator) {
         metaModelValidator.add(new JdoMetaModelValidator());
         metaModelValidator.add(new MetaModelValidatorToCheckObjectSpecIdsUnique());
         metaModelValidator.add(new MetaModelValidatorToCheckModuleExtent());
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactory.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactory.java
index f8b6a2c..c7fc3e8 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactory.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactory.java
@@ -34,6 +34,7 @@ import org.apache.isis.applib.fixtures.LogonFixture;
 import org.apache.isis.applib.services.i18n.TranslationService;
 import org.apache.isis.applib.services.title.TitleService;
 import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.components.ApplicationScopedComponent;
 import org.apache.isis.core.commons.config.IsisConfiguration;
@@ -90,7 +91,7 @@ implements ApplicationScopedComponent, AppManifestProvider {
 
         this.servicesInjector = servicesInjector;
 
-        this.configuration = servicesInjector.getConfigurationServiceInternal();
+        this.configuration = _Config.getConfiguration();
         this.specificationLoader = servicesInjector.getSpecificationLoader();
         this.authenticationManager = servicesInjector.getAuthenticationManager();
         this.authorizationManager = servicesInjector.getAuthorizationManager();
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactoryBuilder.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactoryBuilder.java
index 8552cf2..0145f47 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactoryBuilder.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/system/session/IsisSessionFactoryBuilder.java
@@ -35,11 +35,11 @@ import org.apache.isis.applib.fixtures.FixtureClock;
 import org.apache.isis.applib.fixturescripts.FixtureScripts;
 import org.apache.isis.applib.services.fixturespec.FixtureScriptsDefault;
 import org.apache.isis.commons.internal.context._Context;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.config.internal._Config;
+import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.commons.lang.ListExtensions;
 import org.apache.isis.core.metamodel.facetapi.MetaModelRefiner;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
-import org.apache.isis.core.metamodel.services.configinternal.ConfigurationServiceInternal;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelInvalidException;
 import org.apache.isis.core.runtime.authentication.AuthenticationManager;
@@ -104,7 +104,7 @@ public class IsisSessionFactoryBuilder {
         LOG.info("initialising Isis System");
         LOG.info("working directory: {}", new File(".").getAbsolutePath());
 
-        final IsisConfigurationDefault configuration = componentProvider.getConfiguration();
+        final IsisConfiguration configuration = _Config.getConfiguration();
         LOG.info("resource stream source: {}", configuration.getResourceStreamSource());
 
         localeInitializer.initLocale(configuration);
@@ -124,8 +124,7 @@ public class IsisSessionFactoryBuilder {
             // everything added to ServicesInjector will be able to @javax.inject.Inject'ed
             // the IsisSessionFactory will look up each of these components from the ServicesInjector
 
-            final ServicesInjector servicesInjector = componentProvider.provideServiceInjector(configuration);
-            servicesInjector.addFallbackIfRequired(ConfigurationServiceInternal.class, configuration);
+            final ServicesInjector servicesInjector = componentProvider.provideServiceInjector();
 
             // fixtureScripts
             servicesInjector.addFallbackIfRequired(FixtureScripts.class, new FixtureScriptsDefault());
@@ -146,7 +145,7 @@ public class IsisSessionFactoryBuilder {
             servicesInjector.addFallbackIfRequired(SpecificationLoader.class, specificationLoader);
 
             // persistenceSessionFactory
-            final PersistenceSessionFactory persistenceSessionFactory = PersistenceSessionFactory.of(/*configuration*/);
+            final PersistenceSessionFactory persistenceSessionFactory = PersistenceSessionFactory.get(/*configuration*/);
             servicesInjector.addFallbackIfRequired(PersistenceSessionFactory.class, persistenceSessionFactory);
 
 
@@ -207,11 +206,11 @@ public class IsisSessionFactoryBuilder {
                     },
                     new Callable<Object>() {
                         @Override public Object call() {
-                            persistenceSessionFactory.init(configuration);
+                            persistenceSessionFactory.init();
                             return null;
                         }
                         public String toString() {
-                            return "persistenceSessionFactory#init(...)";
+                            return "persistenceSessionFactory#init()";
                         }
                     },
                     new Callable<Object>() {
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/AuthenticatorBypass.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/AuthenticatorBypass.java
index b8ba2d0..e89b422 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/AuthenticatorBypass.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/AuthenticatorBypass.java
@@ -18,16 +18,11 @@
  */
 package org.apache.isis.core.runtime.systemusinginstallers;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
 import org.apache.isis.core.runtime.authentication.standard.AuthenticatorAbstract;
 
 class AuthenticatorBypass extends AuthenticatorAbstract {
 
-    public AuthenticatorBypass(final IsisConfiguration configuration) {
-        super(configuration);
-    }
-
     @Override
     protected boolean isValid(final AuthenticationRequest request) {
         return true;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProvider.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProvider.java
index fc15470..20d525b 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProvider.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProvider.java
@@ -28,7 +28,6 @@ import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import javax.annotation.Nullable;
-import javax.jdo.annotations.PersistenceCapable;
 import javax.xml.bind.annotation.XmlElement;
 
 import org.apache.isis.applib.AppManifest;
@@ -46,13 +45,13 @@ import org.apache.isis.applib.fixturescripts.FixtureScript;
 import org.apache.isis.commons.internal.base._NullSafe;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.commons.internal.collections._Sets;
-import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.commons.factory.InstanceUtil;
 import org.apache.isis.core.commons.lang.ClassFunctions;
 import org.apache.isis.core.metamodel.facetapi.MetaModelRefiner;
 import org.apache.isis.core.metamodel.facets.Annotations;
 import org.apache.isis.core.metamodel.progmodel.ProgrammingModel;
+import org.apache.isis.core.metamodel.progmodel.ProgrammingModelAbstract.DeprecatedPolicy;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
 import org.apache.isis.core.metamodel.specloader.ReflectorConstants;
 import org.apache.isis.core.metamodel.specloader.SpecificationLoader;
@@ -71,6 +70,8 @@ import org.apache.isis.objectstore.jdo.service.RegisterEntities;
 import org.apache.isis.progmodels.dflt.JavaReflectorHelper;
 import org.apache.isis.progmodels.dflt.ProgrammingModelFacetsJava5;
 
+import static org.apache.isis.commons.internal.base._With.requires;
+
 /**
  *
  */
@@ -79,34 +80,31 @@ public abstract class IsisComponentProvider {
     // -- constructor, fields
 
     private final AppManifest appManifest;
-    private final IsisConfigurationDefault configuration;
+    private final IsisConfigurationBuilder configurationBuilder;
     protected final List<Object> services;
     protected final AuthenticationManager authenticationManager;
     protected final AuthorizationManager authorizationManager;
 
     public IsisComponentProvider(
+            final IsisConfigurationBuilder configurationBuilder,
             final AppManifest appManifest,
-            final IsisConfiguration configuration,
             final AuthenticationManager authenticationManager,
             final AuthorizationManager authorizationManager){
 
-        if(appManifest == null) {
-            throw new IllegalArgumentException("AppManifest is required");
-        }
-
-        this.appManifest = appManifest;
-        this.configuration = (IsisConfigurationDefault) configuration; // REVIEW: HACKY
-
+        this.configurationBuilder = requires(configurationBuilder, "configurationBuilder");
+        this.appManifest = requires(appManifest, "appManifest");
+        
         putAppManifestKey(appManifest);
         findAndRegisterTypes(appManifest);
         specifyServicesAndRegisteredEntitiesUsing(appManifest);
 
         addToConfigurationUsing(appManifest);
 
-        this.services = new ServicesInstallerFromConfigurationAndAnnotation(getConfiguration()).getServices();
+        this.services = new ServicesInstallerFromConfigurationAndAnnotation().getServices();
 
         final String fixtureClassNamesCsv = classNamesFrom(getAppManifest().getFixtures());
-        putConfigurationProperty(FixturesInstallerFromConfiguration.FIXTURES, fixtureClassNamesCsv);
+        
+        configurationBuilder.add(FixturesInstallerFromConfiguration.FIXTURES, fixtureClassNamesCsv);
 
         this.authenticationManager = authenticationManager;
         this.authorizationManager = authorizationManager;
@@ -116,21 +114,14 @@ public abstract class IsisComponentProvider {
         return appManifest;
     }
 
-    public IsisConfigurationDefault getConfiguration() {
-        return configuration;
-    }
-
-
-
     // -- helpers (appManifest)
 
     private void putAppManifestKey(final AppManifest appManifest) {
         // required to prevent RegisterEntities validation from complaining
         // if it can't find any @PersistenceCapable entities in a module
         // that contains only services.
-        putConfigurationProperty(
-                SystemConstants.APP_MANIFEST_KEY, appManifest.getClass().getName()
-                );
+        configurationBuilder.add(
+                SystemConstants.APP_MANIFEST_KEY, appManifest.getClass().getName() );
     }
 
     private void findAndRegisterTypes(final AppManifest appManifest) {
@@ -241,8 +232,8 @@ public abstract class IsisComponentProvider {
         final Stream<String> packageNames = modulePackageNamesFrom(appManifest);
         final String packageNamesCsv = packageNames.collect(Collectors.joining(","));
 
-        putConfigurationProperty(ServicesInstallerFromAnnotation.PACKAGE_PREFIX_KEY, packageNamesCsv);
-        putConfigurationProperty(RegisterEntities.PACKAGE_PREFIX_KEY, packageNamesCsv);
+        configurationBuilder.add(ServicesInstallerFromAnnotation.PACKAGE_PREFIX_KEY, packageNamesCsv);
+        configurationBuilder.add(RegisterEntities.PACKAGE_PREFIX_KEY, packageNamesCsv);
 
         final List<Class<?>> additionalServices = appManifest.getAdditionalServices();
         if(additionalServices != null) {
@@ -252,9 +243,9 @@ public abstract class IsisComponentProvider {
     }
 
     private void appendToPropertyCsvValue(final String servicesKey, final String additionalServicesCsv) {
-        final String existingServicesCsv = configuration.getString(servicesKey);
+        final String existingServicesCsv = configurationBuilder.peekAtString(servicesKey);
         final String servicesCsv = join(existingServicesCsv, additionalServicesCsv);
-        putConfigurationProperty(servicesKey, servicesCsv);
+        configurationBuilder.add(servicesKey, servicesCsv);
     }
 
     private static String join(final String csv1, final String csv2) {
@@ -303,33 +294,11 @@ public abstract class IsisComponentProvider {
         final Map<String, String> configurationProperties = appManifest.getConfigurationProperties();
         if (configurationProperties != null) {
             for (Map.Entry<String, String> configProp : configurationProperties.entrySet()) {
-                addConfigurationProperty(configProp.getKey(), configProp.getValue());
+                configurationBuilder.add(configProp.getKey(), configProp.getValue());
             }
         }
     }
 
-    /**
-     * TODO: hacky, {@link IsisConfiguration} is meant to be immutable...
-     */
-    void putConfigurationProperty(final String key, final String value) {
-        if(value == null) {
-            return;
-        }
-        this.configuration.put(key, value);
-    }
-
-    /**
-     * TODO: hacky, {@link IsisConfiguration} is meant to be immutable...
-     */
-    void addConfigurationProperty(final String key, final String value) {
-        if(value == null) {
-            return;
-        }
-        this.configuration.add(key, value);
-    }
-
-
-
     // -- provideAuth*
 
     public AuthenticationManager provideAuthenticationManager() {
@@ -340,16 +309,14 @@ public abstract class IsisComponentProvider {
         return authorizationManager;
     }
 
-
-
     // -- provideServiceInjector
 
-    public ServicesInjector provideServiceInjector(final IsisConfiguration configuration) {
-        return new ServicesInjector(services, configuration);
+    public ServicesInjector provideServiceInjector() {
+        return ServicesInjector.builderOf(configurationBuilder)
+                .addServices(services)
+                .build();
     }
 
-
-
     // -- provideSpecificationLoader
 
     public SpecificationLoader provideSpecificationLoader(
@@ -361,24 +328,27 @@ public abstract class IsisComponentProvider {
         final MetaModelValidator mmv = createMetaModelValidator();
 
         return JavaReflectorHelper.createObjectReflector(
-                configuration, programmingModel, metaModelRefiners,
+                programmingModel, metaModelRefiners,
                 mmv,
                 servicesInjector);
     }
 
     protected MetaModelValidator createMetaModelValidator() {
+        
         final String metaModelValidatorClassName =
-                configuration.getString(
+                configurationBuilder.peekAtString(
                         ReflectorConstants.META_MODEL_VALIDATOR_CLASS_NAME,
                         ReflectorConstants.META_MODEL_VALIDATOR_CLASS_NAME_DEFAULT);
         return InstanceUtil.createInstance(metaModelValidatorClassName, MetaModelValidator.class);
     }
 
     protected ProgrammingModel createProgrammingModel() {
+        
+        final DeprecatedPolicy deprecatedPolicy = DeprecatedPolicy.parse(configurationBuilder);
 
-        final ProgrammingModel programmingModel = new ProgrammingModelFacetsJava5(configuration);
-        ProgrammingModel.Util.includeFacetFactories(configuration, programmingModel);
-        ProgrammingModel.Util.excludeFacetFactories(configuration, programmingModel);
+        final ProgrammingModel programmingModel = new ProgrammingModelFacetsJava5(deprecatedPolicy);
+        ProgrammingModel.Util.includeFacetFactories(configurationBuilder, programmingModel);
+        ProgrammingModel.Util.excludeFacetFactories(configurationBuilder, programmingModel);
         return programmingModel;
     }
 
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProviderDefault2.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProviderDefault2.java
index ee8f846..e161dfb 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProviderDefault2.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProviderDefault2.java
@@ -20,8 +20,7 @@
 package org.apache.isis.core.runtime.systemusinginstallers;
 
 import org.apache.isis.applib.AppManifest;
-import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.commons.resource.ResourceStreamSourceContextLoaderClassPath;
 import org.apache.isis.core.runtime.authentication.AuthenticationManager;
 import org.apache.isis.core.runtime.authentication.standard.AuthenticationManagerStandard;
@@ -30,32 +29,32 @@ import org.apache.isis.core.runtime.authorization.standard.AuthorizationManagerS
 
 public class IsisComponentProviderDefault2 extends IsisComponentProvider  {
 
-    // -- constructors
-
     public IsisComponentProviderDefault2(
             final AppManifest appManifest,
-            final IsisConfiguration configurationOverride) {
-        this(elseDefault(configurationOverride), appManifest);
+            final IsisConfigurationBuilder configurationBuilder) {
+        this(elseDefault(configurationBuilder), appManifest);
 
     }
+    
+    // -- HELPER
 
     private IsisComponentProviderDefault2(
-            final IsisConfigurationDefault configuration,
+            final IsisConfigurationBuilder configurationBuilder,
             final AppManifest appManifest
             ) {
-        this(configuration, appManifest,
+        this(configurationBuilder, appManifest,
                 // integration tests ignore appManifest for authentication and authorization.
-                authenticationManagerWithBypass(configuration),
-                new AuthorizationManagerStandard(configuration));
+                authenticationManagerWithBypass(configurationBuilder),
+                new AuthorizationManagerStandard());
     }
 
     private IsisComponentProviderDefault2(
-            final IsisConfigurationDefault configuration,
+            final IsisConfigurationBuilder configurationBuilder,
             final AppManifest appManifest,
             final AuthenticationManager authenticationManager,
             final AuthorizationManager authorizationManager
             ) {
-        super(appManifest, configuration, authenticationManager, authorizationManager);
+        super(configurationBuilder, appManifest, authenticationManager, authorizationManager);
     }
 
 
@@ -65,18 +64,18 @@ public class IsisComponentProviderDefault2 extends IsisComponentProvider  {
      * Default will read <tt>isis.properties</tt> (and other optional property files) from the &quot;config&quot;
      * package on the current classpath.
      */
-    private static IsisConfigurationDefault elseDefault(final IsisConfiguration configuration) {
-        return configuration != null
-                ? (IsisConfigurationDefault) configuration
-                        : new IsisConfigurationDefault(ResourceStreamSourceContextLoaderClassPath.create("config"));
+    private static IsisConfigurationBuilder elseDefault(final IsisConfigurationBuilder configurationBuilder) {
+        return configurationBuilder != null
+                ? configurationBuilder
+                        : new IsisConfigurationBuilder(ResourceStreamSourceContextLoaderClassPath.create("config"));
     }
 
     /**
      * The standard authentication manager, configured with the 'bypass' authenticator (allows all requests through).
      */
-    private static AuthenticationManager authenticationManagerWithBypass(final IsisConfiguration configuration ) {
-        final AuthenticationManagerStandard authenticationManager = new AuthenticationManagerStandard(configuration);
-        authenticationManager.addAuthenticator(new AuthenticatorBypass(configuration));
+    private static AuthenticationManager authenticationManagerWithBypass(final IsisConfigurationBuilder configuration ) {
+        final AuthenticationManagerStandard authenticationManager = new AuthenticationManagerStandard();
+        authenticationManager.addAuthenticator(new AuthenticatorBypass());
         return authenticationManager;
     }
 
diff --git a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProviderUsingInstallers.java b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProviderUsingInstallers.java
index 36e20f7..d5b36a5 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProviderUsingInstallers.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/runtime/systemusinginstallers/IsisComponentProviderUsingInstallers.java
@@ -28,8 +28,7 @@ import org.apache.isis.applib.AppManifest;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.components.ApplicationScopedComponent;
 import org.apache.isis.core.commons.components.Installer;
-import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.commons.ensure.Assert;
 import org.apache.isis.core.commons.factory.InstanceCreationClassException;
 import org.apache.isis.core.commons.factory.InstanceCreationException;
@@ -49,50 +48,49 @@ public class IsisComponentProviderUsingInstallers extends IsisComponentProvider
 
     public IsisComponentProviderUsingInstallers(
             final AppManifest appManifest,
-            final IsisConfiguration configuration) {
+            final IsisConfigurationBuilder configurationBuilder) {
+        
         this(appManifest,
-                (IsisConfigurationDefault) configuration, // REVIEW: HACKY
-                new InstallerLookup(configuration));
+                configurationBuilder,
+                new InstallerLookup(configurationBuilder));
     }
-
+    
     public IsisComponentProviderUsingInstallers(
             final AppManifest appManifest,
-            final IsisConfigurationDefault configuration,
+            final IsisConfigurationBuilder configurationBuilder,
             final InstallerLookup installerLookup) {
-        this(configuration, appManifest,
-                lookupAuthenticationManager(appManifest, installerLookup, configuration),
-                lookupAuthorizationManager(appManifest, installerLookup, configuration));
+        this(configurationBuilder, appManifest,
+                lookupAuthenticationManager(appManifest, installerLookup, configurationBuilder),
+                lookupAuthorizationManager(appManifest, installerLookup, configurationBuilder));
     }
 
     private IsisComponentProviderUsingInstallers(
-            final IsisConfiguration configuration,
+            final IsisConfigurationBuilder configurationBuilder,
             final AppManifest appManifest,
             final AuthenticationManager authenticationManager,
             final AuthorizationManager authorizationManager){
-        super(appManifest, configuration, authenticationManager, authorizationManager);
+        super(configurationBuilder, appManifest, authenticationManager, authorizationManager);
     }
 
-
-
     // -- constructor helpers (factories)
 
     private static AuthenticationManager lookupAuthenticationManager(
             final AppManifest appManifest, final InstallerLookup installerLookup,
-            final IsisConfigurationDefault configuration) {
+            final IsisConfigurationBuilder configurationBuilder) {
 
         final String authenticationMechanism = appManifest.getAuthenticationMechanism();
         final AuthenticationManagerInstaller authenticationInstaller =
                 installerLookup.authenticationManagerInstaller(authenticationMechanism);
 
         // no longer used, could probably remove
-        configuration.put(SystemConstants.AUTHENTICATION_INSTALLER_KEY, authenticationMechanism);
+        configurationBuilder.put(SystemConstants.AUTHENTICATION_INSTALLER_KEY, authenticationMechanism);
 
         return authenticationInstaller.createAuthenticationManager();
     }
 
     private static AuthorizationManager lookupAuthorizationManager(
             final AppManifest appManifest, final InstallerLookup installerLookup,
-            final IsisConfigurationDefault configuration) {
+            final IsisConfigurationBuilder configurationBuilder) {
 
         final String authorizationMechanism = appManifest.getAuthorizationMechanism();
 
@@ -101,7 +99,7 @@ public class IsisComponentProviderUsingInstallers extends IsisComponentProvider
                 installerLookup.authorizationManagerInstaller(authorizationMechanism);
 
         // no longer used, could probably remove
-        configuration.put(SystemConstants.AUTHORIZATION_INSTALLER_KEY, authorizationMechanism);
+        configurationBuilder.put(SystemConstants.AUTHORIZATION_INSTALLER_KEY, authorizationMechanism);
 
         return authorizationInstaller.createAuthorizationManager();
     }
@@ -131,11 +129,11 @@ public class IsisComponentProviderUsingInstallers extends IsisComponentProvider
 
         // -- constructor, fields
 
-        private final IsisConfiguration isisConfiguration;
+        private final IsisConfigurationBuilder configurationBuilder;
         private final List<Installer> installerList = _Lists.newArrayList();
 
-        public InstallerLookup(final IsisConfiguration isisConfiguration) throws InstanceCreationException {
-            this.isisConfiguration = isisConfiguration;
+        public InstallerLookup(final IsisConfigurationBuilder configurationBuilder) throws InstanceCreationException {
+            this.configurationBuilder = configurationBuilder;
 
             final List<String> installerClassNames = _Lists.of(
                     "org.apache.isis.core.security.authentication.BypassAuthenticationManagerInstaller", // bypass
@@ -149,7 +147,7 @@ public class IsisComponentProviderUsingInstallers extends IsisComponentProvider
                     continue;
                 }
                 try {
-                    final Installer object = (Installer) InstanceUtil.createInstance(className, isisConfiguration);
+                    final Installer object = (Installer) InstanceUtil.createInstance(className); //[2039] second arg removed
                     LOG.debug("created component installer: {} - {}", object.getName(), className);
                     installerList.add(object);
                 } catch (final UnavailableClassException e) {
@@ -218,7 +216,7 @@ public class IsisComponentProviderUsingInstallers extends IsisComponentProvider
                 final String key,
                 final String defaultImpl) {
             if (reqImpl == null) {
-                reqImpl = isisConfiguration.getString(key, defaultImpl);
+                reqImpl = configurationBuilder.peekAtString(key, defaultImpl);
             }
             if (reqImpl == null) {
                 return null;
diff --git a/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppBootstrapper.java b/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppBootstrapper.java
index 982a45a..53bfd04 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppBootstrapper.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppBootstrapper.java
@@ -27,7 +27,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import org.apache.isis.commons.internal.context._Context;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.config.IsisConfiguration.ContainsPolicy;
 import org.apache.isis.core.commons.config.NotFoundPolicy;
 import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.runtime.logging.IsisLoggingConfigurer;
@@ -81,7 +81,7 @@ public final class IsisWebAppBootstrapper implements ServletContextListener {
             final IsisConfigurationBuilder isisConfigurationBuilder) {
         final String resourceName =
                 IsisContext.getEnvironment().getDeploymentType().name().toLowerCase() + ".properties";
-        isisConfigurationBuilder.addConfigurationResource(resourceName, NotFoundPolicy.CONTINUE, IsisConfigurationDefault.ContainsPolicy.IGNORE);
+        isisConfigurationBuilder.addConfigurationResource(resourceName, NotFoundPolicy.CONTINUE, ContainsPolicy.IGNORE);
     }
 
 
diff --git a/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppConfigProvider.java b/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppConfigProvider.java
index f2b19d1..9f56999 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppConfigProvider.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppConfigProvider.java
@@ -109,7 +109,7 @@ public class IsisWebAppConfigProvider {
         requires(key, "key");
         requires(defaultValue, "defaultValue");
         
-        final String configValue = getConfigurationBuilder(servletContext).peekAt(key);
+        final String configValue = getConfigurationBuilder(servletContext).peekAtString(key);
         return ifPresentElse(configValue, defaultValue);
     }
     
@@ -121,7 +121,7 @@ public class IsisWebAppConfigProvider {
      */
     public static IsisWebAppConfigProvider getInstance() {
         return getOrThrow(IsisWebAppConfigProvider.class, 
-                ()->new IllegalStateException("No config provider registered on this context."));
+                ()->new IllegalStateException("No config provider registered on current context."));
     }
     
     public static IsisWebAppConfigProvider registerInstanceIfAbsent() {
diff --git a/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppContextListener.java b/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppContextListener.java
index 92d94d7..eae2ab3 100644
--- a/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppContextListener.java
+++ b/core/runtime/src/main/java/org/apache/isis/core/webapp/IsisWebAppContextListener.java
@@ -31,7 +31,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import org.apache.isis.commons.internal.context._Context;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.core.commons.config.IsisConfiguration.ContainsPolicy;
 import org.apache.isis.core.commons.config.NotFoundPolicy;
 import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.runtime.system.context.IsisContext;
@@ -82,7 +82,7 @@ public class IsisWebAppContextListener implements ServletContextListener {
                 IsisWebAppConfigProvider.getInstance().getConfigurationBuilder(servletContext);
         isisConfigurationBuilder.addDefaultConfigurationResourcesAndPrimers();
         
-        IsisContext.EnvironmentPrimer.primeEnvironment(isisConfigurationBuilder.getConfiguration());
+        IsisContext.EnvironmentPrimer.primeEnvironment(isisConfigurationBuilder);
 
         final List<WebModule> webModules =
                  WebModule.discoverWebModules()
@@ -109,7 +109,7 @@ public class IsisWebAppContextListener implements ServletContextListener {
             final IsisConfigurationBuilder isisConfigurationBuilder) {
         final String resourceName = 
                 IsisContext.getEnvironment().getDeploymentType().name().toLowerCase() + ".properties";
-        isisConfigurationBuilder.addConfigurationResource(resourceName, NotFoundPolicy.CONTINUE, IsisConfigurationDefault.ContainsPolicy.IGNORE);
+        isisConfigurationBuilder.addConfigurationResource(resourceName, NotFoundPolicy.CONTINUE, ContainsPolicy.IGNORE);
     }
 
     @Override
diff --git a/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorDefaultTest.java b/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorDefaultTest.java
index a9188fa..beab0b9 100644
--- a/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorDefaultTest.java
+++ b/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/AuthenticatorDefaultTest.java
@@ -37,17 +37,12 @@ public class AuthenticatorDefaultTest {
 
     private final Mockery mockery = new JUnit4Mockery();
 
-    private IsisConfiguration mockConfiguration;
     private AuthenticatorAbstract authenticator;
 
     @Before
     public void setUp() {
         
-                
-        
-        mockConfiguration = mockery.mock(IsisConfiguration.class);
-
-        authenticator = new AuthenticatorAbstract(mockConfiguration) {
+        authenticator = new AuthenticatorAbstract() {
 
             @Override
             public boolean isValid(final AuthenticationRequest request) {
@@ -63,7 +58,7 @@ public class AuthenticatorDefaultTest {
 
     @Test
     public void getConfiguration() throws Exception {
-        assertThat(authenticator.getConfiguration(), is(mockConfiguration));
+        //assertThat(authenticator.getConfiguration(), is(mockConfiguration));
     }
 
 
diff --git a/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/StandardAuthenticationManager_AuthenticationTest.java b/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/StandardAuthenticationManager_AuthenticationTest.java
index 98148c3..9809ffd 100644
--- a/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/StandardAuthenticationManager_AuthenticationTest.java
+++ b/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/StandardAuthenticationManager_AuthenticationTest.java
@@ -31,7 +31,6 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequestPassword;
 
@@ -45,19 +44,17 @@ public class StandardAuthenticationManager_AuthenticationTest {
 
     private AuthenticationManagerStandard authenticationManager;
 
-    private IsisConfiguration mockConfiguration;
     private RandomCodeGenerator mockRandomCodeGenerator;
     private Authenticator mockAuthenticator;
     private AuthenticationSession mockAuthSession;
 
     @Before
     public void setUp() throws Exception {
-        mockConfiguration = mockery.mock(IsisConfiguration.class);
         mockRandomCodeGenerator = mockery.mock(RandomCodeGenerator.class);
         mockAuthenticator = mockery.mock(Authenticator.class);
         mockAuthSession = mockery.mock(AuthenticationSession.class);
 
-        authenticationManager = new AuthenticationManagerStandard(mockConfiguration);
+        authenticationManager = new AuthenticationManagerStandard();
         authenticationManager.addAuthenticator(mockAuthenticator);
         authenticationManager.setRandomCodeGenerator(mockRandomCodeGenerator);
 
diff --git a/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/StandardAuthenticationManager_AuthenticatorsTest.java b/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/StandardAuthenticationManager_AuthenticatorsTest.java
index 85e39b8..e1ae2b3 100644
--- a/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/StandardAuthenticationManager_AuthenticatorsTest.java
+++ b/core/runtime/src/test/java/org/apache/isis/core/runtime/authentication/standard/StandardAuthenticationManager_AuthenticatorsTest.java
@@ -19,10 +19,6 @@
 
 package org.apache.isis.core.runtime.authentication.standard;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.hamcrest.CoreMatchers.sameInstance;
-import static org.junit.Assert.assertThat;
-
 import java.util.List;
 
 import org.jmock.Mockery;
@@ -32,23 +28,24 @@ import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequestPassword;
 
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.sameInstance;
+import static org.junit.Assert.assertThat;
+
 @RunWith(JMock.class)
 public class StandardAuthenticationManager_AuthenticatorsTest {
 
     private final Mockery mockery = new JUnit4Mockery();
 
-    private IsisConfiguration mockConfiguration;
     private AuthenticationManagerStandard authenticationManager;
     private Authenticator mockAuthenticator;
 
     @Before
     public void setUp() throws Exception {
-        mockConfiguration = mockery.mock(IsisConfiguration.class);
         mockAuthenticator = mockery.mock(Authenticator.class);
-        authenticationManager = new AuthenticationManagerStandard(mockConfiguration);
+        authenticationManager = new AuthenticationManagerStandard();
     }
 
     @Test
diff --git a/core/runtime/src/test/java/org/apache/isis/core/runtime/system/ObjectActionLayoutXmlDefaultTest.java b/core/runtime/src/test/java/org/apache/isis/core/runtime/system/ObjectActionLayoutXmlDefaultTest.java
index 83cf360..37a68f9 100644
--- a/core/runtime/src/test/java/org/apache/isis/core/runtime/system/ObjectActionLayoutXmlDefaultTest.java
+++ b/core/runtime/src/test/java/org/apache/isis/core/runtime/system/ObjectActionLayoutXmlDefaultTest.java
@@ -19,11 +19,6 @@
 
 package org.apache.isis.core.runtime.system;
 
-import static org.hamcrest.Matchers.equalTo;
-import static org.hamcrest.Matchers.is;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertThat;
-
 import org.jmock.Expectations;
 import org.jmock.auto.Mock;
 import org.junit.Before;
@@ -34,7 +29,6 @@ import org.apache.isis.applib.Identifier;
 import org.apache.isis.applib.services.message.MessageService;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.facets.FacetedMethod;
 import org.apache.isis.core.metamodel.facets.all.named.NamedFacet;
 import org.apache.isis.core.metamodel.facets.all.named.NamedFacetAbstract;
@@ -45,6 +39,11 @@ import org.apache.isis.core.metamodel.specloader.specimpl.ObjectActionDefault;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
 
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+
 public class ObjectActionLayoutXmlDefaultTest {
 
     @Rule
@@ -60,27 +59,23 @@ public class ObjectActionLayoutXmlDefaultTest {
     private AuthenticationSessionProvider mockAuthenticationSessionProvider;
     @Mock
     private SpecificationLoader mockSpecificationLoader;
-//    @Mock
-//    private AdapterManager mockAdapterManager;
     @Mock
     private MessageService mockMessageService;
     @Mock
     private PersistenceSessionServiceInternal mockPersistenceSessionServiceInternal;
 
     private ServicesInjector stubServicesInjector;
-    private IsisConfigurationDefault stubConfiguration;
 
     @Before
     public void setUp() throws Exception {
 
-        stubConfiguration = new IsisConfigurationDefault();
-
-        stubServicesInjector =
-                new ServicesInjector(_Lists.of(
+        stubServicesInjector = ServicesInjector.builderForTesting()
+                .addServices(_Lists.of(
                         mockAuthenticationSessionProvider,
                         mockSpecificationLoader,
                         mockPersistenceSessionServiceInternal,
-                        mockMessageService), stubConfiguration);
+                        mockMessageService))
+                .build();
 
         context.checking(new Expectations() {
             {
diff --git a/core/runtime/src/test/java/org/apache/isis/core/runtime/system/OneToManyAssociationDefaultTest.java b/core/runtime/src/test/java/org/apache/isis/core/runtime/system/OneToManyAssociationDefaultTest.java
index 4792085..f4d19c2 100644
--- a/core/runtime/src/test/java/org/apache/isis/core/runtime/system/OneToManyAssociationDefaultTest.java
+++ b/core/runtime/src/test/java/org/apache/isis/core/runtime/system/OneToManyAssociationDefaultTest.java
@@ -19,10 +19,6 @@
 
 package org.apache.isis.core.runtime.system;
 
-import static org.hamcrest.Matchers.equalTo;
-import static org.hamcrest.Matchers.is;
-import static org.junit.Assert.assertThat;
-
 import org.jmock.Expectations;
 import org.jmock.auto.Mock;
 import org.junit.Before;
@@ -33,7 +29,6 @@ import org.apache.isis.applib.Identifier;
 import org.apache.isis.applib.services.message.MessageService;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.consent.InteractionInitiatedBy;
 import org.apache.isis.core.metamodel.facets.FacetedMethod;
@@ -49,6 +44,10 @@ import org.apache.isis.core.metamodel.specloader.specimpl.OneToManyAssociationDe
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2.Mode;
 
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+
 public class OneToManyAssociationDefaultTest {
 
     private static final String COLLECTION_ID = "orders";
@@ -85,18 +84,18 @@ public class OneToManyAssociationDefaultTest {
     private CollectionAddToFacet mockCollectionAddToFacet;
 
     private ServicesInjector stubServicesInjector;
-    private IsisConfigurationDefault stubConfiguration;
 
     private OneToManyAssociation association;
 
     @Before
     public void setUp() {
-        stubConfiguration = new IsisConfigurationDefault();
-        stubServicesInjector = new ServicesInjector(_Lists.of(
+        stubServicesInjector = ServicesInjector.builderForTesting()
+                .addServices(_Lists.of(
                 mockAuthenticationSessionProvider,
                 mockSpecificationLoader,
                 mockMessageService,
-                mockPersistenceSessionServiceInternal), stubConfiguration);
+                mockPersistenceSessionServiceInternal))
+                .build();
 
         allowingPeerToReturnCollectionType();
         allowingPeerToReturnIdentifier();
diff --git a/core/security/src/main/java/org/apache/isis/core/security/authentication/AuthenticatorBypass.java b/core/security/src/main/java/org/apache/isis/core/security/authentication/AuthenticatorBypass.java
index c397ba0..449a5f8 100644
--- a/core/security/src/main/java/org/apache/isis/core/security/authentication/AuthenticatorBypass.java
+++ b/core/security/src/main/java/org/apache/isis/core/security/authentication/AuthenticatorBypass.java
@@ -19,7 +19,6 @@
 
 package org.apache.isis.core.security.authentication;
 
-import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.runtime.authentication.AuthenticationRequest;
 import org.apache.isis.core.runtime.authentication.standard.AuthenticatorAbstract;
 
@@ -31,10 +30,6 @@ import org.apache.isis.core.runtime.authentication.standard.AuthenticatorAbstrac
  */
 public class AuthenticatorBypass extends AuthenticatorAbstract {
 
-    public AuthenticatorBypass(final IsisConfiguration configuration) {
-        super(configuration);
-    }
-
     @Override
     public boolean isValid(final AuthenticationRequest request) {
         return true;
diff --git a/core/security/src/main/java/org/apache/isis/core/security/authentication/BypassAuthenticationManagerInstaller.java b/core/security/src/main/java/org/apache/isis/core/security/authentication/BypassAuthenticationManagerInstaller.java
index a1466aa..8b93e6d 100644
--- a/core/security/src/main/java/org/apache/isis/core/security/authentication/BypassAuthenticationManagerInstaller.java
+++ b/core/security/src/main/java/org/apache/isis/core/security/authentication/BypassAuthenticationManagerInstaller.java
@@ -22,7 +22,6 @@ package org.apache.isis.core.security.authentication;
 import java.util.List;
 
 import org.apache.isis.commons.internal.collections._Lists;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.runtime.authentication.AuthenticationManagerStandardInstallerAbstractForDfltRuntime;
 import org.apache.isis.core.runtime.authentication.standard.Authenticator;
 
@@ -36,13 +35,13 @@ import org.apache.isis.core.runtime.authentication.standard.Authenticator;
  */
 public class BypassAuthenticationManagerInstaller extends AuthenticationManagerStandardInstallerAbstractForDfltRuntime {
 
-    public BypassAuthenticationManagerInstaller(final IsisConfigurationDefault isisConfiguration) {
-        super("bypass", isisConfiguration);
+    public BypassAuthenticationManagerInstaller() {
+        super("bypass");
     }
 
     @Override
     protected List<Authenticator> createAuthenticators() {
-        return _Lists.of(new AuthenticatorBypass(getConfiguration()));
+        return _Lists.of(new AuthenticatorBypass());
     }
 
 }
diff --git a/core/security/src/main/java/org/apache/isis/core/security/authorization/BypassAuthorizationManagerInstaller.java b/core/security/src/main/java/org/apache/isis/core/security/authorization/BypassAuthorizationManagerInstaller.java
index e8a2876..b7dbc54 100644
--- a/core/security/src/main/java/org/apache/isis/core/security/authorization/BypassAuthorizationManagerInstaller.java
+++ b/core/security/src/main/java/org/apache/isis/core/security/authorization/BypassAuthorizationManagerInstaller.java
@@ -19,14 +19,13 @@
 
 package org.apache.isis.core.security.authorization;
 
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.runtime.authorization.standard.AuthorizationManagerStandardInstallerAbstract;
 import org.apache.isis.core.runtime.authorization.standard.Authorizor;
 
 public class BypassAuthorizationManagerInstaller extends AuthorizationManagerStandardInstallerAbstract {
 
-    public BypassAuthorizationManagerInstaller(final IsisConfigurationDefault isisConfiguration) {
-        super("bypass", isisConfiguration);
+    public BypassAuthorizationManagerInstaller() {
+        super("bypass");
     }
 
     @Override
diff --git a/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/IsisWicketApplication.java b/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/IsisWicketApplication.java
index bcace7c..8b0af81 100644
--- a/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/IsisWicketApplication.java
+++ b/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/IsisWicketApplication.java
@@ -71,9 +71,9 @@ import org.slf4j.LoggerFactory;
 import org.wicketstuff.select2.ApplicationSettings;
 
 import org.apache.isis.commons.internal.context._Context;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.authentication.AuthenticationSession;
 import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
 import org.apache.isis.core.metamodel.specloader.validator.MetaModelInvalidException;
@@ -216,7 +216,7 @@ implements ComponentFactoryRegistryAccessor, PageClassRegistryAccessor, WicketVi
     @com.google.inject.Inject
     private WicketViewerSettings settings;
 
-    private IsisConfigurationDefault isisConfiguration;
+    private IsisConfigurationBuilder isisConfigurationBuilder;
     private final IsisWicketApplication_Experimental experimental;
 
 
@@ -246,13 +246,13 @@ implements ComponentFactoryRegistryAccessor, PageClassRegistryAccessor, WicketVi
 
         // --- prepare the configuration prior to init()
         
-        isisConfiguration = prepareConfiguration();
+        isisConfigurationBuilder = prepareConfigurationBuilder();
         
         super.internalInit();
 
     }
     
-    private IsisConfigurationDefault prepareConfiguration() {
+    private IsisConfigurationBuilder prepareConfigurationBuilder() {
         
         final String isisConfigDir = getServletContext().getInitParameter("isis.config.dir");
         configureLogging(isisConfigDir);
@@ -260,10 +260,8 @@ implements ComponentFactoryRegistryAccessor, PageClassRegistryAccessor, WicketVi
         final IsisConfigurationBuilder isisConfigurationBuilder = IsisWebAppConfigProvider.getInstance()
                 .getConfigurationBuilder(getServletContext());
         isisConfigurationBuilder.addDefaultConfigurationResourcesAndPrimers();
-
-        final IsisConfigurationDefault configuration = isisConfigurationBuilder.getConfiguration();
         
-        return configuration;
+        return isisConfigurationBuilder;
     }
 
     private static AjaxRequestTarget decorate(final AjaxRequestTarget ajaxRequestTarget) {
@@ -291,15 +289,15 @@ implements ComponentFactoryRegistryAccessor, PageClassRegistryAccessor, WicketVi
         // that's suitable for the entire web-application to use as default.
         _Context.setDefaultClassLoader(this.getClass().getClassLoader(), true);
         
+        requireNonNull(isisConfigurationBuilder, "ConfigurationBuilder must be prepared prior to init().");
+        final IsisConfiguration configuration = isisConfigurationBuilder.build();
+        
         List<Future<Object>> futures = null;
         try {
             super.init();
 
             futures = startBackgroundInitializationThreads();
 
-            final IsisConfigurationDefault configuration = requireNonNull(isisConfiguration, 
-                    "Configuration must be prepared prior to init().");
-
             getRequestCycleSettings().setRenderStrategy(RequestCycleSettings.RenderStrategy.REDIRECT_TO_RENDER);
             getResourceSettings().setParentFolderPlaceholder("$up$");
 
@@ -311,8 +309,8 @@ implements ComponentFactoryRegistryAccessor, PageClassRegistryAccessor, WicketVi
             //
             // create IsisSessionFactory
             //
-            final IsisInjectModule isisModule = newIsisModule(configuration);
-            final Injector injector = Guice.createInjector(isisModule, newIsisWicketModule(isisConfiguration));
+            final IsisInjectModule isisModule = newIsisModule();
+            final Injector injector = Guice.createInjector(isisModule, newIsisWicketModule(configuration));
             initWicketComponentInjection(injector);
 
             injector.injectMembers(this); // populates this.isisSessionFactory
@@ -386,7 +384,7 @@ implements ComponentFactoryRegistryAccessor, PageClassRegistryAccessor, WicketVi
             ThreadPoolSupport.getInstance().join(futures);
         }
 
-        final String themeName = isisConfiguration.getString(
+        final String themeName = configuration.getString(
                 "isis.viewer.wicket.themes.initial", BOOTSWATCH_THEME_DEFAULT.name());
         BootswatchTheme bootswatchTheme;
         try {
@@ -458,8 +456,9 @@ implements ComponentFactoryRegistryAccessor, PageClassRegistryAccessor, WicketVi
     }
 
     protected void configureWicketSourcePluginIfNecessary() {
-        final IsisConfigurationDefault configuration = requireNonNull(isisConfiguration, 
-                "Configuration must be prepared prior to init().");
+        final IsisConfiguration configuration = _Config.getConfiguration();
+        requireNonNull(configuration, "Configuration must be prepared prior to init().");
+        
         if(isWicketSourcePluginEnabled(configuration)) {
             configureWicketSourcePlugin();
         }
@@ -739,8 +738,8 @@ implements ComponentFactoryRegistryAccessor, PageClassRegistryAccessor, WicketVi
     
     // //////////////////////////////////////
 
-    protected IsisInjectModule newIsisModule(final IsisConfigurationDefault isisConfiguration) {
-        return new IsisInjectModule(isisConfiguration);
+    protected IsisInjectModule newIsisModule() {
+        return new IsisInjectModule();
     }
 
     // //////////////////////////////////////
diff --git a/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/integration/isis/IsisInjectModule.java b/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/integration/isis/IsisInjectModule.java
index 7c64eb5..3f3a854 100644
--- a/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/integration/isis/IsisInjectModule.java
+++ b/core/viewer-wicket-impl/src/main/java/org/apache/isis/viewer/wicket/viewer/integration/isis/IsisInjectModule.java
@@ -28,17 +28,11 @@ import com.google.inject.Singleton;
 
 import org.apache.isis.applib.AppManifest;
 import org.apache.isis.applib.fixturescripts.FixtureScript;
-import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
+import org.apache.isis.config.internal._Config;
 import org.apache.isis.core.commons.factory.InstanceUtil;
 import org.apache.isis.core.metamodel.services.ServicesInjector;
-import org.apache.isis.core.plugins.environment.DeploymentType;
 import org.apache.isis.core.runtime.system.SystemConstants;
-import org.apache.isis.core.runtime.system.context.IsisContext;
 import org.apache.isis.core.runtime.system.session.IsisSessionFactory;
-import org.apache.isis.core.runtime.system.session.IsisSessionFactoryBuilder;
-import org.apache.isis.core.runtime.systemusinginstallers.IsisComponentProvider;
-import org.apache.isis.core.runtime.systemusinginstallers.IsisComponentProviderUsingInstallers;
 
 public class IsisInjectModule extends AbstractModule {
 
@@ -75,15 +69,6 @@ public class IsisInjectModule extends AbstractModule {
         }
     };
 
-    //private final DeploymentCategory deploymentCategory;
-    private final IsisConfigurationDefault isisConfiguration;
-
-    public IsisInjectModule(
-            final IsisConfigurationDefault isisConfiguration) {
-        this.isisConfiguration = isisConfiguration;
-        //this.deploymentCategory = IsisContext.getEnvironment().getDeploymentCategory();
-    }
-
     /**
      * Allows the {@link AppManifest} to be programmatically bound in.
      *
@@ -97,39 +82,25 @@ public class IsisInjectModule extends AbstractModule {
         bind(AppManifest.class).toInstance(APP_MANIFEST_NOOP);
     }
 
-    /**
-     * Simply as provided in the constructor.
-     */
-    @Provides
-    @Singleton
-    protected IsisConfiguration provideConfiguration() {
-        return isisConfiguration;
-    }
-
-    @Provides
-    @Singleton
-    protected DeploymentType provideDeploymentType() {
-        return IsisContext.getEnvironment().getDeploymentType();
-    }
-
-    @Provides
-    @com.google.inject.Inject
-    @Singleton
-    protected IsisSessionFactory provideIsisSessionFactory(
-            final AppManifest appManifestIfExplicitlyBound) {
-
-        final AppManifest appManifestToUse = determineAppManifest(appManifestIfExplicitlyBound);
-
-        final IsisComponentProvider componentProvider =
-                new IsisComponentProviderUsingInstallers(appManifestToUse, isisConfiguration);
-
-        final IsisSessionFactoryBuilder builder =
-                new IsisSessionFactoryBuilder(componentProvider, componentProvider.getAppManifest());
-
-        // as a side-effect, if the metamodel turns out to be invalid, then
-        // this will push the MetaModelInvalidException into IsisContext.
-        return builder.buildSessionFactory();
-    }
+//TODO[2039]
+//    @Provides
+//    @com.google.inject.Inject
+//    @Singleton
+//    protected IsisSessionFactory provideIsisSessionFactory(
+//            final AppManifest appManifestIfExplicitlyBound) {
+//
+//        final AppManifest appManifestToUse = determineAppManifest(appManifestIfExplicitlyBound);
+//
+//        final IsisComponentProvider componentProvider =
+//                new IsisComponentProviderUsingInstallers(appManifestToUse);
+//
+//        final IsisSessionFactoryBuilder builder =
+//                new IsisSessionFactoryBuilder(componentProvider, componentProvider.getAppManifest());
+//
+//        // as a side-effect, if the metamodel turns out to be invalid, then
+//        // this will push the MetaModelInvalidException into IsisContext.
+//        return builder.buildSessionFactory();
+//    }
 
     @Provides
     @com.google.inject.Inject
@@ -145,7 +116,7 @@ public class IsisInjectModule extends AbstractModule {
                 ? appManifestIfExplicitlyBound
                         : null;
 
-        return appManifestFrom(appManifest, isisConfiguration);
+        return appManifestFrom(appManifest);
     }
 
 
@@ -155,12 +126,11 @@ public class IsisInjectModule extends AbstractModule {
      * for an <tt>isis.appManifest</tt> entry instead.
      */
     private static AppManifest appManifestFrom(
-            final AppManifest appManifestFromConstructor,
-            final IsisConfiguration configuration) {
+            final AppManifest appManifestFromConstructor) {
         if(appManifestFromConstructor != null) {
             return appManifestFromConstructor;
         }
-        final String appManifestFromConfiguration = configuration.getString(SystemConstants.APP_MANIFEST_KEY);
+        final String appManifestFromConfiguration = _Config.getConfiguration().getString(SystemConstants.APP_MANIFEST_KEY);
         return appManifestFromConfiguration != null
                 ? InstanceUtil.createInstance(appManifestFromConfiguration, AppManifest.class)
                         : null;
diff --git a/core/viewer-wicket-impl/src/test/java/org/apache/isis/viewer/wicket/viewer/isisWicketModule_bindingsStandard_Test.java b/core/viewer-wicket-impl/src/test/java/org/apache/isis/viewer/wicket/viewer/isisWicketModule_bindingsStandard_Test.java
index c59ea42..71d15be 100644
--- a/core/viewer-wicket-impl/src/test/java/org/apache/isis/viewer/wicket/viewer/isisWicketModule_bindingsStandard_Test.java
+++ b/core/viewer-wicket-impl/src/test/java/org/apache/isis/viewer/wicket/viewer/isisWicketModule_bindingsStandard_Test.java
@@ -38,7 +38,6 @@ import org.junit.runners.Parameterized;
 import org.junit.runners.Parameterized.Parameters;
 
 import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.config.IsisConfigurationDefault;
 import org.apache.isis.core.unittestsupport.jmocking.JUnitRuleMockery2;
 import org.apache.isis.viewer.wicket.ui.app.registry.ComponentFactoryRegistrar;
 import org.apache.isis.viewer.wicket.ui.app.registry.ComponentFactoryRegistry;
@@ -109,7 +108,7 @@ public class isisWicketModule_bindingsStandard_Test {
 	private static class ConfigModule extends AbstractModule {
 		@Override 
 		protected void configure() {
-			bind(IsisConfiguration.class).to(IsisConfigurationDefault.class);
+			bind(IsisConfiguration.class).to(IsisConfiguration.class);
 		}
 	}
 
diff --git a/core/webserver/src/main/java/org/apache/isis/core/webserver/WebServer.java b/core/webserver/src/main/java/org/apache/isis/core/webserver/WebServer.java
index d536f11..75fe684 100644
--- a/core/webserver/src/main/java/org/apache/isis/core/webserver/WebServer.java
+++ b/core/webserver/src/main/java/org/apache/isis/core/webserver/WebServer.java
@@ -19,16 +19,8 @@
 
 package org.apache.isis.core.webserver;
 
-import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_PORT_DEFAULT;
-import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_PORT_KEY;
-import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_RESOURCE_BASE_DEFAULT;
-import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_RESOURCE_BASE_KEY;
-import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_STARTUP_MODE_DEFAULT;
-import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_STARTUP_MODE_KEY;
-
 import java.io.File;
 import java.net.URI;
-import java.util.Arrays;
 import java.util.Formatter;
 import java.util.List;
 import java.util.Map;
@@ -42,13 +34,9 @@ import org.slf4j.LoggerFactory;
 import org.apache.isis.commons.internal.collections._Lists;
 import org.apache.isis.core.commons.config.ConfigurationConstants;
 import org.apache.isis.core.commons.config.IsisConfiguration;
-import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
 import org.apache.isis.core.commons.exceptions.IsisException;
 import org.apache.isis.core.commons.lang.ArrayExtensions;
 import org.apache.isis.core.commons.lang.ObjectExtensions;
-import org.apache.isis.core.commons.resource.ResourceStreamSource;
-import org.apache.isis.core.commons.resource.ResourceStreamSourceContextLoaderClassPath;
-import org.apache.isis.core.commons.resource.ResourceStreamSourceFileSystem;
 import org.apache.isis.core.runtime.logging.IsisLoggingConfigurer;
 import org.apache.isis.core.runtime.optionhandler.OptionHandler;
 import org.apache.isis.core.runtime.runner.opts.OptionHandlerAdditionalProperty;
@@ -59,9 +47,17 @@ import org.apache.isis.core.runtime.runner.opts.OptionHandlerFixtureFromEnvironm
 import org.apache.isis.core.runtime.runner.opts.OptionHandlerHelp;
 import org.apache.isis.core.runtime.runner.opts.OptionHandlerSystemProperties;
 import org.apache.isis.core.webapp.IsisWebAppConfigProvider;
+import org.apache.isis.core.webserver.config.WebServerConfigBuilder;
 import org.apache.isis.core.webserver.internal.OptionHandlerPort;
 import org.apache.isis.core.webserver.internal.OptionHandlerStartupMode;
 
+import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_PORT_DEFAULT;
+import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_PORT_KEY;
+import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_RESOURCE_BASE_DEFAULT;
+import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_RESOURCE_BASE_KEY;
+import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_STARTUP_MODE_DEFAULT;
+import static org.apache.isis.core.webserver.WebServerConstants.EMBEDDED_WEB_SERVER_STARTUP_MODE_KEY;
+
 public class WebServer {
 
     private static final Logger LOG = LoggerFactory.getLogger(WebServer.class);
@@ -111,17 +107,16 @@ public class WebServer {
         loggingConfigurer.configureLogging(guessConfigDirectory(), args);
 
         // set up the configuration
-        final IsisConfigurationBuilder isisConfigurationBuilder = new IsisConfigurationBuilder();
-        isisConfigurationBuilder.addResourceStreamSources(resourceStreamSources());
-
-        if(!isisConfigurationBuilder.parseAndPrimeWith(standardHandlers(), args)) {
+        final WebServerConfigBuilder webServerConfigBuilder = new WebServerConfigBuilder();  
+        if(!webServerConfigBuilder.parseAndPrimeWith(standardHandlers(), args)) {
             return;
         }
 
+        final IsisConfiguration configuration = webServerConfigBuilder.build();
+        
         // create and start
-        jettyServer = createJettyServerAndBindConfig(isisConfigurationBuilder);
-
-        final IsisConfiguration configuration = isisConfigurationBuilder.peekConfiguration();
+        jettyServer = createJettyServerAndBindConfig(configuration);
+        
         final String startupModeStr = configuration.getString(
                 EMBEDDED_WEB_SERVER_STARTUP_MODE_KEY, EMBEDDED_WEB_SERVER_STARTUP_MODE_DEFAULT);
         final StartupMode startupMode = StartupMode.lookup(startupModeStr);
@@ -149,11 +144,8 @@ public class WebServer {
                     ConfigurationConstants.DEFAULT_CONFIG_DIRECTORY;
     }
 
+    private Server createJettyServerAndBindConfig(final IsisConfiguration configuration) {
 
-    private Server createJettyServerAndBindConfig(final IsisConfigurationBuilder configurationBuilder) {
-
-        // the Isis system is actually bootstrapped by the ServletContextInitializer in the web.xml
-        final IsisConfiguration configuration = configurationBuilder.peekConfiguration();
         final int port = configuration.getInteger(
                 EMBEDDED_WEB_SERVER_PORT_KEY, EMBEDDED_WEB_SERVER_PORT_DEFAULT);
         final String webappContextPath = configuration.getString(
@@ -166,7 +158,7 @@ public class WebServer {
         jettyServer.setHandler(context);
 
         final IsisWebAppConfigProvider configProvider = IsisWebAppConfigProvider.registerInstanceIfAbsent();
-        configProvider.addConfig(configurationBuilder.peekConfiguration().asMap());
+        configProvider.addConfig(configuration.asMap());
 
         return jettyServer;
     }
@@ -195,20 +187,6 @@ public class WebServer {
         initParams.putAll(convertedInitParams);
     }
 
-
-    /**
-     * Set of locations to search for config files.
-     */
-    private static List<ResourceStreamSource> resourceStreamSources() {
-        final List<ResourceStreamSource> rssList = _Lists.newArrayList();
-        rssList.addAll(Arrays.asList(
-                ResourceStreamSourceFileSystem.create(ConfigurationConstants.DEFAULT_CONFIG_DIRECTORY),
-                ResourceStreamSourceFileSystem.create(ConfigurationConstants.WEBINF_FULL_DIRECTORY),
-                ResourceStreamSourceContextLoaderClassPath.create(),
-                ResourceStreamSourceContextLoaderClassPath.create(ConfigurationConstants.WEBINF_DIRECTORY)));
-        return rssList;
-    }
-
     public void stop() {
         if (jettyServer == null) {
             return;
diff --git a/core/webserver/src/main/java/org/apache/isis/core/webserver/config/WebServerConfigBuilder.java b/core/webserver/src/main/java/org/apache/isis/core/webserver/config/WebServerConfigBuilder.java
new file mode 100644
index 0000000..3ef8107
--- /dev/null
+++ b/core/webserver/src/main/java/org/apache/isis/core/webserver/config/WebServerConfigBuilder.java
@@ -0,0 +1,85 @@
+package org.apache.isis.core.webserver.config;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.commons.cli.CommandLine;
+import org.apache.commons.cli.CommandLineParser;
+import org.apache.commons.cli.DefaultParser;
+import org.apache.commons.cli.Options;
+import org.apache.commons.cli.ParseException;
+
+import org.apache.isis.commons.internal.collections._Lists;
+import org.apache.isis.core.commons.config.ConfigurationConstants;
+import org.apache.isis.core.commons.config.IsisConfiguration;
+import org.apache.isis.core.commons.configbuilder.IsisConfigurationBuilder;
+import org.apache.isis.core.commons.resource.ResourceStreamSource;
+import org.apache.isis.core.commons.resource.ResourceStreamSourceContextLoaderClassPath;
+import org.apache.isis.core.commons.resource.ResourceStreamSourceFileSystem;
+import org.apache.isis.core.runtime.optionhandler.BootPrinter;
+import org.apache.isis.core.runtime.optionhandler.OptionHandler;
+
+public class WebServerConfigBuilder {
+    
+    private final IsisConfigurationBuilder isisConfigurationBuilder = new IsisConfigurationBuilder();
+    
+    public WebServerConfigBuilder() {
+        isisConfigurationBuilder.addResourceStreamSources(resourceStreamSources());
+    }
+
+    public boolean parseAndPrimeWith(final List<OptionHandler> optionHandlers, final String[] args) {
+
+        // add options (ie cmd line flags)
+        final Options options = new Options();
+        for (final OptionHandler optionHandler : optionHandlers) {
+            optionHandler.addOption(options);
+        }
+
+        // parse options from the cmd line
+        final boolean parsedOk = parseAndPrimeWith(options, optionHandlers, args);
+
+        if(parsedOk) {
+            for (final OptionHandler optionHandler : optionHandlers) {
+                isisConfigurationBuilder.primeWith(optionHandler);
+            }
+        }
+
+        return parsedOk;
+    }
+
+    private boolean parseAndPrimeWith(final Options options, final List<OptionHandler> optionHandlers, final String[] args) {
+        final BootPrinter printer = new BootPrinter(getClass());
+        final CommandLineParser parser = new DefaultParser();
+        try {
+            final CommandLine commandLine = parser.parse(options, args);
+            for (final OptionHandler optionHandler : optionHandlers) {
+                if (!optionHandler.handle(commandLine, printer, options)) {
+                    return false;
+                }
+            }
+        } catch (final ParseException e) {
+            printer.printErrorMessage(e.getMessage());
+            printer.printHelp(options);
+            return false;
+        }
+        return true;
+    }
+    
+    /**
+     * Set of locations to search for config files.
+     */
+    private static List<ResourceStreamSource> resourceStreamSources() {
+        final List<ResourceStreamSource> rssList = _Lists.newArrayList();
+        rssList.addAll(Arrays.asList(
+                ResourceStreamSourceFileSystem.create(ConfigurationConstants.DEFAULT_CONFIG_DIRECTORY),
+                ResourceStreamSourceFileSystem.create(ConfigurationConstants.WEBINF_FULL_DIRECTORY),
+                ResourceStreamSourceContextLoaderClassPath.create(),
+                ResourceStreamSourceContextLoaderClassPath.create(ConfigurationConstants.WEBINF_DIRECTORY)));
+        return rssList;
+    }
+
+    public IsisConfiguration build() {
+        return isisConfigurationBuilder.build();
+    }
+    
+}