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Posted to cvs@avalon.apache.org by mc...@apache.org on 2002/08/22 03:15:52 UTC
cvs commit: jakarta-avalon-excalibur/assembly README.TXT
mcconnell 2002/08/21 18:15:51
Modified: assembly README.TXT
Log:
Update on project status, recent activities and refreshing the to-do list based
on recently achievements.
Revision Changes Path
1.14 +11 -12 jakarta-avalon-excalibur/assembly/README.TXT
Index: README.TXT
===================================================================
RCS file: /home/cvs/jakarta-avalon-excalibur/assembly/README.TXT,v
retrieving revision 1.13
retrieving revision 1.14
diff -u -r1.13 -r1.14
--- README.TXT 12 Aug 2002 02:33:05 -0000 1.13
+++ README.TXT 22 Aug 2002 01:15:51 -0000 1.14
@@ -1,6 +1,6 @@
-Merlin2 � an open service management architecture.
-==================================================
+Merlin 2 � an open service management architecture.
+===================================================
This package contains work in progress originating from the Merlin container. It includes a set of dealing with the definition of a system kernel, container hierarchies, component assembly, and component deployment and decommissioning. Everything is this package is ALPHA and is subject to change. A demonstration of current status is normally possible by invoking the following ant targets:
@@ -12,12 +12,15 @@
Status
------
+22-AUG-2002
+Introduction of a LifestyleManager into the kernel abstraction. Upgrading of the lifestyle management systems to support pooled and per-thread component creation from Berin Loritsch. Lifestyle extension management solution inspired by Marcus Crafter and resolved following joint Merlin/Fortress co-development. Updgrading of nested kernel behaviour (nested kernel root container appears as just another nested container). Documentation updates and enhancements. Seperation of the lifestyle interfaces and abstract implementation to excalibur/container and seperation of the meta-info model to excalibur/meta. Modification of APIs in relation to the phase/stage terminology discussion. System validation against the cornerstone component suite, several components in Avalon Apps (ORB, PSS, Time) and several non-opensource components.
+
12-AUG-2002
Container abstraction seperated out such that a container is managed as a classic component with
potential dependecies, extensions, and consumers. Container creation is independent of the
DefaultContainer base class (any implementation of the Container interface is usable). Creation
of a new container hierachy by a container component is now possible via creation of an embedded
-Kernel and requesting theb kernel's root container.
+Kernel and requesting the kernel's root container.
04-AUG-2002
Independent threads for containers.
@@ -48,19 +51,15 @@
To-Do
-----
-Short-term:
-
-1. Addition of pooled support under a service manager variant as per Merlin 1 is pending.
-
-Medium-Term:
-
1. Introduction of component factories will be required as a complement to the <component/> directive - e.g <factory/>.
-4. Upgrading of error handling against classic fail scenarios (class not in classpath, manifest errors, informative configuration errors).
+2. Upgrading of error handling against classic fail scenarios (class not in classpath, manifest errors, informative configuration errors).
+
+3. Gentle degrade of service deployment profile on error - if a component cannot be deployed, disable the activation of all of the dependent service but continue on with deployment of the remaining services (currently the situation is somewhat of a domino failure effect - if a supplier service fails, a dependent will fail because the supplier failed - this situation can be avoided by disabling depenedent services in fail conditions).
-5. Gentle degrade of service deployment profile on error - if a component cannot be deployed, disable the activation of all of the dependent service but continue on with deployment of the remaining services (currently the situation is somewhat of a domino failure effect - if a supplier service fails, a dependent will fail because the supplier failed - this situation can be avoided by disabling depenedent services in fail conditions).
+4. Inclusion of explicit directives concerning assembly should be included although quite complex dependecy maps are readily managable using strait-forward logic based assembly of suppliers and consumers.
-6. Inclusion of explicit directives concerning assembly should be included although quite complex dependecy maps are readily managable using strait-forward logic based assembly of suppliers and consumers.
+5. Unit testing.
Stephen McConnell
mcconnell@apache.org
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