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Posted to commits@tapestry.apache.org by bu...@apache.org on 2017/09/26 19:20:28 UTC
svn commit: r1018755 [7/15] - in /websites/production/tapestry/content: ./
cache/
Modified: websites/production/tapestry/content/ioc-cookbook-overriding-ioc-services.html
==============================================================================
--- websites/production/tapestry/content/ioc-cookbook-overriding-ioc-services.html (original)
+++ websites/production/tapestry/content/ioc-cookbook-overriding-ioc-services.html Tue Sep 26 19:20:27 2017
@@ -27,16 +27,6 @@
</title>
<link type="text/css" rel="stylesheet" href="/resources/space.css" />
- <link href='/resources/highlighter/styles/shCoreCXF.css' rel='stylesheet' type='text/css' />
- <link href='/resources/highlighter/styles/shThemeCXF.css' rel='stylesheet' type='text/css' />
- <script src='/resources/highlighter/scripts/shCore.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushJava.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushXml.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushPlain.js' type='text/javascript'></script>
- <script>
- SyntaxHighlighter.defaults['toolbar'] = false;
- SyntaxHighlighter.all();
- </script>
<link href="/styles/style.css" rel="stylesheet" type="text/css"/>
@@ -77,15 +67,12 @@
</div>
<div id="content">
- <div id="ConfluenceContent"><h1 id="IoCCookbook-OverridingIoCServices-OverridingTapestryIoCServices">Overriding Tapestry IoC Services</h1><p>Tapestry is designed to be easy to customize, and the IoC container is the key to that customizability.</p><p>One of Tapestry's most important activities is resolving injected objects; that is, when Tapestry is building an object or service and sees a constructor parameter or a field, it must decide what value to plug in. Most of the time, the injected object is a service defined elsewhere within the Tapestry IoC container.</p><p>However, there are cases where you might want to override how Tapestry operates in some specific way.</p><p>The strategy used to determine what object gets injected is <a href="injection-in-detail.html">defined inside Tapestry IoC itself</a>; thus we can take advantage of several features of the Tapestry IoC container in order to take control over specific injections.</p><h2 id="IoCCookbook-OverridingI
oCServices-ContributingaServiceOverride">Contributing a Service Override</h2><p>In most cases, services are injected by matching just the type; there is no @<a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/ioc/annotations/InjectService.html">InjectService</a> annotation, just a method or constructor parameter whose type matches the service's interface.</p><p>In this case, it is very easy to supply your own alternate implementation of a service, by <em>contributing</em><em> a Service Override</em> in your module class (usually AppModule.java), like this:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>AppModule.java (partial)</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;"> @Contribute(ServiceOverride.class)
+ <div id="ConfluenceContent"><plain-text-body>{scrollbar}</plain-text-body><h1 id="IoCCookbook-OverridingIoCServices-OverridingTapestryIoCServices">Overriding Tapestry IoC Services</h1><p>Tapestry is designed to be easy to customize, and the IoC container is the key to that customizability.</p><p>One of Tapestry's most important activities is resolving injected objects; that is, when Tapestry is building an object or service and sees a constructor parameter or a field, it must decide what value to plug in. Most of the time, the injected object is a service defined elsewhere within the Tapestry IoC container.</p><p>However, there are cases where you might want to override how Tapestry operates in some specific way.</p><p>The strategy used to determine what object gets injected is <a href="injection-in-detail.html">defined inside Tapestry IoC itself</a>; thus we can take advantage of several features of the Tapestry IoC container in order to take control over specific
injections.</p><h2 id="IoCCookbook-OverridingIoCServices-ContributingaServiceOverride">Contributing a Service Override</h2><p>In most cases, services are injected by matching just the type; there is no @<a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/ioc/annotations/InjectService.html">InjectService</a> annotation, just a method or constructor parameter whose type matches the service's interface.</p><p>In this case, it is very easy to supply your own alternate implementation of a service, by <em>contributing</em><em> a Service Override</em> in your module class (usually AppModule.java), like this:</p><parameter ac:name="title">AppModule.java (partial)</parameter><parameter ac:name="lang">java</parameter><plain-text-body> @Contribute(ServiceOverride.class)
public static void setupApplicationServiceOverrides(MappedConfiguration<Class,Object> configuration)
{
configuration.addInstance(SomeServiceType.class, SomeServiceTypeOverrideImpl.class);
}
-</pre>
-</div></div><p>The name of the method is not important, as long as the @<a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/ioc/annotations/Contribute.html">Contribute</a> annotation is present on the method.</p><p>In this example, we are using <code>addInstance()</code> which will instantiate the indicated class and handle dependency resolution. (Be careful with this, because in some cases, resolving dependencies of the override class can require checking against the ServiceOverrides service, and you'll get a runtime exception about ServiceOverrides requiring itself!).</p><p>Sometimes you'll want to define the override as a service of its own. This is useful if you want to inject a Logger specific to the service, or if the overriding implementation needs a <a href="tapestry-ioc-configuration.html">service configuration</a>:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bot
tom-width: 1px;"><b>AppModule.java (partial)</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;"> public static void bind(ServiceBinder binder)
+</plain-text-body><p>The name of the method is not important, as long as the @<a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/ioc/annotations/Contribute.html">Contribute</a> annotation is present on the method.</p><p>In this example, we are using <code>addInstance()</code> which will instantiate the indicated class and handle dependency resolution. (Be careful with this, because in some cases, resolving dependencies of the override class can require checking against the ServiceOverrides service, and you'll get a runtime exception about ServiceOverrides requiring itself!).</p><p>Sometimes you'll want to define the override as a service of its own. This is useful if you want to inject a Logger specific to the service, or if the overriding implementation needs a <a href="tapestry-ioc-configuration.html">service configuration</a>:</p><parameter ac:name="title">AppModule.java (partial)</parameter><parameter ac:name="lang">java</parameter><
plain-text-body> public static void bind(ServiceBinder binder)
{
binder.bind(SomeServiceType.class, SomeServiceTypeOverrideImpl.class).withId("SomeServiceTypeOverride");
}
@@ -95,14 +82,11 @@
{
configuration.add(SomeServiceType.class, override);
}
-</pre>
-</div></div><p>Here we're defining a service using the module's <code>bind()</code> method.</p><p>Every service in the IoC container must have a unique id, that's why we used the <code>withId()</code> method; if we we hadn't, the default service id would have been "SomeServiceType" which is a likely conflict with the very service we're trying to override.</p><p>We can inject our overriding implementation of SomeServiceType using the special @<a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/annotations/Local.html">Local</a> annotation, which indicates that a service within the same module only should be injected (that is, services of the indicated type in other modules are ignored). Without @Local, there would be a problem because the override parameter would need to be resolved using the MasterObjectProvider and, ultimately, the ServiceOverride service; this would cause Tapestry to throw an exception indicating that ServiceOverride depe
nds on itself. We defuse that situation by using @Local, which prevents the MasterObjectProvider service from being used to resolve the override parameter.</p><h2 id="IoCCookbook-OverridingIoCServices-DecoratingServices">Decorating Services</h2><p>Another option is to <a href="tapestry-ioc-decorators.html">decorate</a> the existing service. Perhaps you want to extend some of the behavior of the service but keep the rest.</p><p>Alternately, this approach is useful to override a service that is matched using marker annotations.</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeHeader panelHeader pdl" style="border-bottom-width: 1px;"><b>AppModule.java (partial)</b></div><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;"> public SomeServiceType decorateSomeServiceType(final SomeServiceType delegate)
+</plain-text-body><p>Here we're defining a service using the module's <code>bind()</code> method.</p><p>Every service in the IoC container must have a unique id, that's why we used the <code>withId()</code> method; if we we hadn't, the default service id would have been "SomeServiceType" which is a likely conflict with the very service we're trying to override.</p><p>We can inject our overriding implementation of SomeServiceType using the special @<a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/annotations/Local.html">Local</a> annotation, which indicates that a service within the same module only should be injected (that is, services of the indicated type in other modules are ignored). Without @Local, there would be a problem because the override parameter would need to be resolved using the MasterObjectProvider and, ultimately, the ServiceOverride service; this would cause Tapestry to throw an exception indicating that ServiceOverrid
e depends on itself. We defuse that situation by using @Local, which prevents the MasterObjectProvider service from being used to resolve the override parameter.</p><h2 id="IoCCookbook-OverridingIoCServices-DecoratingServices">Decorating Services</h2><p>Another option is to <a href="tapestry-ioc-decorators.html">decorate</a> the existing service. Perhaps you want to extend some of the behavior of the service but keep the rest.</p><p>Alternately, this approach is useful to override a service that is matched using marker annotations.</p><parameter ac:name="title">AppModule.java (partial)</parameter><parameter ac:name="lang">java</parameter><plain-text-body> public SomeServiceType decorateSomeServiceType(final SomeServiceType delegate)
{
return new SomeServiceType() { . . . };
}
-</pre>
-</div></div><p>This decorate method is invoked because its name matches the service id of the original service, "SomeServiceType" (you have to adjust the name to match the service id).</p><p>The method is passed the original service and its job it to return an <em>interceptor</em>, an object that implements the same interface, wrapping around the original service. In many cases, your code will simply re-invoke methods on the delegate, passing the same parameters. However, an interceptor can decide to not invoke methods, or it can change parameters, or change return values, or catch or throw exceptions.</p><p>Note that the object passed in as <code>delegate</code> may be the core service implementation, or it may be some other interceptor from some other decorator for the same service.</p><hr><p> </p><p> </p></div>
+</plain-text-body><p>This decorate method is invoked because its name matches the service id of the original service, "SomeServiceType" (you have to adjust the name to match the service id).</p><p>The method is passed the original service and its job it to return an <em>interceptor</em>, an object that implements the same interface, wrapping around the original service. In many cases, your code will simply re-invoke methods on the delegate, passing the same parameters. However, an interceptor can decide to not invoke methods, or it can change parameters, or change return values, or catch or throw exceptions.</p><p>Note that the object passed in as <code>delegate</code> may be the core service implementation, or it may be some other interceptor from some other decorator for the same service.</p><hr><p> </p><p> </p><plain-text-body>{scrollbar}</plain-text-body></div>
</div>
<div class="clearer"></div>
Modified: websites/production/tapestry/content/ioc-cookbook-patterns.html
==============================================================================
--- websites/production/tapestry/content/ioc-cookbook-patterns.html (original)
+++ websites/production/tapestry/content/ioc-cookbook-patterns.html Tue Sep 26 19:20:27 2017
@@ -27,16 +27,6 @@
</title>
<link type="text/css" rel="stylesheet" href="/resources/space.css" />
- <link href='/resources/highlighter/styles/shCoreCXF.css' rel='stylesheet' type='text/css' />
- <link href='/resources/highlighter/styles/shThemeCXF.css' rel='stylesheet' type='text/css' />
- <script src='/resources/highlighter/scripts/shCore.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushJava.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushXml.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushPlain.js' type='text/javascript'></script>
- <script>
- SyntaxHighlighter.defaults['toolbar'] = false;
- SyntaxHighlighter.all();
- </script>
<link href="/styles/style.css" rel="stylesheet" type="text/css"/>
@@ -77,65 +67,11 @@
</div>
<div id="content">
- <div id="ConfluenceContent"><p>Tapestry IoC has support for implementing several of the <a class="external-link" href="http://en.wikipedia.org/wiki/Design_pattern_(computer_science)" rel="nofollow">Gang Of Four Design Patterns</a>. In fact, the IoC container itself is a pumped up version of the Factory pattern.</p><div class="aui-label" style="float:right" title="Related Articles">
-
-
-
-
-
-
-
-
-<h3>Related Articles</h3>
-
-<ul class="content-by-label"><li>
- <div>
- <span class="icon aui-icon aui-icon-small aui-iconfont-page-default" title="Page">Page:</span> </div>
-
- <div class="details">
- <a href="ioc-cookbook-patterns.html">IoC Cookbook - Patterns</a>
-
-
- </div>
- </li><li>
- <div>
- <span class="icon aui-icon aui-icon-small aui-iconfont-page-default" title="Page">Page:</span> </div>
-
- <div class="details">
- <a href="strategybuilder-service.html">StrategyBuilder Service</a>
-
-
- </div>
- </li><li>
- <div>
- <span class="icon aui-icon aui-icon-small aui-iconfont-page-default" title="Page">Page:</span> </div>
-
- <div class="details">
- <a href="pipelinebuilder-service.html">PipelineBuilder Service</a>
-
-
- </div>
- </li><li>
- <div>
- <span class="icon aui-icon aui-icon-small aui-iconfont-page-default" title="Page">Page:</span> </div>
-
- <div class="details">
- <a href="chainbuilder-service.html">ChainBuilder Service</a>
-
-
- </div>
- </li></ul>
-</div>
-
-
-<p>The basis for these patterns is often the use of <em>service builder methods</em>, where a <a href="ioc-cookbook-service-configurations.html">configuration</a> for the service is combined with a factory to produce the service implementation on the fly.</p><p><span class="confluence-anchor-link" id="IoCCookbook-Patterns-chainofcommand"></span></p><h1 id="IoCCookbook-Patterns-ChainofCommandPattern">Chain of Command Pattern</h1><p>Main Article: <a href="chainbuilder-service.html">Chain of Command</a></p><p>Let's look at another example, again from the Tapestry code base. The <a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/services/InjectionProvider.html">InjectProvider</a> interface is used to process the @Inject annotation on the fields of a Tapestry page or component. Many different instances are combined together to form a <em>chain of command</em>.</p><p>The interface has only a single method (this is far from uncommon):</p><div
class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">public interface InjectionProvider
+ <div id="ConfluenceContent"><p><plain-text-body>{scrollbar}</plain-text-body>Tapestry IoC has support for implementing several of the <a class="external-link" href="http://en.wikipedia.org/wiki/Design_pattern_(computer_science)" rel="nofollow">Gang Of Four Design Patterns</a>. In fact, the IoC container itself is a pumped up version of the Factory pattern.</p><parameter ac:name="style">float:right</parameter><parameter ac:name="title">Related Articles</parameter><parameter ac:name="class">aui-label</parameter><rich-text-body><parameter ac:name="showLabels">false</parameter><parameter ac:name="showSpace">false</parameter><parameter ac:name="title">Related Articles</parameter><parameter ac:name="cql">label = "patterns" and space = currentSpace()</parameter></rich-text-body><p>The basis for these patterns is often the use of <em>service builder methods</em>, where a <a href="ioc-cookbook-service-configurations.html">configuration</a> for the service is combined with a
factory to produce the service implementation on the fly.</p><p><parameter ac:name="">chainofcommand</parameter></p><h1 id="IoCCookbook-Patterns-ChainofCommandPattern">Chain of Command Pattern</h1><p>Main Article: <a href="chainbuilder-service.html">Chain of Command</a></p><p>Let's look at another example, again from the Tapestry code base. The <a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/services/InjectionProvider.html">InjectProvider</a> interface is used to process the @Inject annotation on the fields of a Tapestry page or component. Many different instances are combined together to form a <em>chain of command</em>.</p><p>The interface has only a single method (this is far from uncommon):</p><parameter ac:name="language">java</parameter><plain-text-body>public interface InjectionProvider
{
boolean provideInjection(String fieldName, Class fieldType, ObjectLocator locator,
ClassTransformation transformation, MutableComponentModel componentModel);
-}</pre>
-</div></div><p>The return type indicates whether the provider was able to do something. For example, the AssetInjectionProvider checks to see if there's an @Path annotation on the field, and if so, converts the path to an asset, works with the ClassTransformation object to implement injection, and returns true to indicate success. Returning true terminates the chain early, and that true value is ultimately returned to the caller.</p><p>In other cases, it returns false and the chain of command continues down to the next provider. If no provider is capable of handling the injection, then the value false is ultimately returned.</p><p>The InjectionProvider service is built up via contributions. These are the contributions from the TapestryModule:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">public static void contributeInjectionProvider(
+}</plain-text-body><p>The return type indicates whether the provider was able to do something. For example, the AssetInjectionProvider checks to see if there's an @Path annotation on the field, and if so, converts the path to an asset, works with the ClassTransformation object to implement injection, and returns true to indicate success. Returning true terminates the chain early, and that true value is ultimately returned to the caller.</p><p>In other cases, it returns false and the chain of command continues down to the next provider. If no provider is capable of handling the injection, then the value false is ultimately returned.</p><p>The InjectionProvider service is built up via contributions. These are the contributions from the TapestryModule:</p><parameter ac:name="language">java</parameter><plain-text-body>public static void contributeInjectionProvider(
OrderedConfiguration<InjectionProvider> configuration,
MasterObjectProvider masterObjectProvider,
ObjectLocator locator,
@@ -152,14 +88,10 @@
configuration.add("Block", new BlockInjectionProvider(), "before:Default");
configuration.add("Service", new ServiceInjectionProvider(locator), "after:*");
-}</pre>
-</div></div><p>And, of course, other contributions could be made in other modules ... if you wanted to add in your own form of injection.</p><p>The configuration is converted into a service via a service builder method:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;"> public InjectionProvider build(List<InjectionProvider> configuration, ChainBuilder chainBuilder)
+}</plain-text-body><p>And, of course, other contributions could be made in other modules ... if you wanted to add in your own form of injection.</p><p>The configuration is converted into a service via a service builder method:</p><parameter ac:name="language">java</parameter><plain-text-body> public InjectionProvider build(List<InjectionProvider> configuration, ChainBuilder chainBuilder)
{
return chainBuilder.build(InjectionProvider.class, configuration);
- }</pre>
-</div></div><p>Now, let's see how this is used. The InjectWorker class looks for fields with the InjectAnnotation, and uses the chain of command to inject the appropriate value. However, to InjectWorker, there is no chain ... just a <em>single</em> object that implements the InjectionProvider interface.</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">public class InjectWorker implements ComponentClassTransformWorker
+ }</plain-text-body><p>Now, let's see how this is used. The InjectWorker class looks for fields with the InjectAnnotation, and uses the chain of command to inject the appropriate value. However, to InjectWorker, there is no chain ... just a <em>single</em> object that implements the InjectionProvider interface.</p><parameter ac:name="language">java</parameter><plain-text-body>public class InjectWorker implements ComponentClassTransformWorker
{
private final ObjectLocator locator;
@@ -202,8 +134,7 @@
}
}
-}</pre>
-</div></div><p>Reducing the chain to a single object vastly simplifies the code: we've <em>factored out</em> the loop implicit in the chain of command. That eliminates a lot of code, and that's less code to test, and fewer paths through InjectWorker, which lowers its complexity further. We don't have to test the cases where the list of injection providers is empty, or consists of only a single object, or where it's the third object in that returns true: it looks like a single object, it acts like a single object ... but its implementation uses many objects.</p></div>
+}</plain-text-body><p>Reducing the chain to a single object vastly simplifies the code: we've <em>factored out</em> the loop implicit in the chain of command. That eliminates a lot of code, and that's less code to test, and fewer paths through InjectWorker, which lowers its complexity further. We don't have to test the cases where the list of injection providers is empty, or consists of only a single object, or where it's the third object in that returns true: it looks like a single object, it acts like a single object ... but its implementation uses many objects.<plain-text-body>{scrollbar}</plain-text-body></p></div>
</div>
<div class="clearer"></div>
Modified: websites/production/tapestry/content/ioc-cookbook-service-configurations.html
==============================================================================
--- websites/production/tapestry/content/ioc-cookbook-service-configurations.html (original)
+++ websites/production/tapestry/content/ioc-cookbook-service-configurations.html Tue Sep 26 19:20:27 2017
@@ -27,16 +27,6 @@
</title>
<link type="text/css" rel="stylesheet" href="/resources/space.css" />
- <link href='/resources/highlighter/styles/shCoreCXF.css' rel='stylesheet' type='text/css' />
- <link href='/resources/highlighter/styles/shThemeCXF.css' rel='stylesheet' type='text/css' />
- <script src='/resources/highlighter/scripts/shCore.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushJava.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushXml.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushPlain.js' type='text/javascript'></script>
- <script>
- SyntaxHighlighter.defaults['toolbar'] = false;
- SyntaxHighlighter.all();
- </script>
<link href="/styles/style.css" rel="stylesheet" type="text/css"/>
@@ -77,7 +67,7 @@
</div>
<div id="content">
- <div id="ConfluenceContent">
+ <div id="ConfluenceContent"><plain-text-body>{scrollbar}</plain-text-body>
<h1 id="IoCcookbook-ServiceConfigurations-ServiceConfigurations">Service Configurations</h1>
@@ -101,14 +91,12 @@
<p>The Tapestry module makes a contribution into the service configuration:</p>
-<div class="code panel pdl" style="border-style: solid;border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">
+<parameter ac:name="borderStyle">solid</parameter><plain-text-body>
public static void contributeResourceDigestGenerator(Configuration<String> configuration)
{
configuration.add("class");
configuration.add("tml");
- }</pre>
-</div></div>
+ }</plain-text-body>
<p>This is a <em>service contribution method</em>, a method that is invoked to provide values for a configuration. We'll see how the service receives these contributions shortly. The <a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/ioc/Configuration.html">Configuration</a> object is how values are added to the service's configuration. Other parameters to a service configuration method are injected much as with a service's constructor, or a service builder method.</p>
@@ -118,16 +106,14 @@
<p>Say your application stored a file on the classpath needed by your application; for illustrative purposes, perhaps it is a PGP private key. You don't want any client to able to download a .pgp file, no matter how unlikely that would be. Thus:</p>
-<div class="code panel pdl" style="border-style: solid;border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">
+<parameter ac:name="borderStyle">solid</parameter><plain-text-body>
public class MyAppModule
{
public static void contributeResourceDigestGenerator(Configuration<String> configuration)
{
configuration.add("pgp");
}
-}</pre>
-</div></div>
+}</plain-text-body>
<p>The contribution in MyAppModule doesn't <em>replace</em> the normal contribution, it is <em>combined</em>. The end result is that .class, .tml and .pgp files would <em>all</em> be protected.</p>
@@ -135,8 +121,7 @@ public class MyAppModule
<p>A service receives the configuration as an injected parameter ... not of type Configuration (that's used for <em>making</em> contributions), but instead is of type Collection:</p>
-<div class="code panel pdl" style="border-style: solid;border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">
+<parameter ac:name="borderStyle">solid</parameter><plain-text-body>
public class ResourceDigestGeneratorImpl implements ResourceDigestGenerator
{
private final Set<String> digestExtensions;
@@ -147,8 +132,7 @@ public class ResourceDigestGeneratorImpl
}
. . .
-}</pre>
-</div></div>
+}</plain-text-body>
<p>In many cases, the configuration is simply stored into an instance variable; in this example, the value is transformed from a Collection to a Set.</p>
@@ -162,8 +146,7 @@ public class ResourceDigestGeneratorImpl
<p>Alternately, if the Request can't be handled, the Dispatcher returns false.</p>
-<div class="code panel pdl" style="border-style: solid;border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">
+<parameter ac:name="borderStyle">solid</parameter><plain-text-body>
public void contributeMasterDispatcher(OrderedConfiguration<Dispatcher> configuration, . . .)
{
// Looks for the root path and renders the start page
@@ -181,8 +164,7 @@ public void contributeMasterDispatcher(O
configuration.add("PageRender", new PageRenderDispatcher(. . .));
configuration.add("ComponentAction", new ComponentActionDispatcher(. . .), "after:PageRender");
-}</pre>
-</div></div>
+}</plain-text-body>
<p>With an <a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/ioc/OrderedConfiguration.html">OrderedConfiguration</a>, each contribution gets a name, which must be unique. Here the names are RootPath, Asset, PageRender and ComponentAction.</p>
@@ -198,13 +180,11 @@ public void contributeMasterDispatcher(O
<p>The MasterDispatcher service configuration defines a <a href="chainbuilder-service.html">Chain of Command</a> and we can provide the implementation using virtually no code:</p>
-<div class="code panel pdl" style="border-style: solid;border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">
+<parameter ac:name="borderStyle">solid</parameter><plain-text-body>
public static Dispatcher buildMasterDispatcher(List<Dispatcher> configuration, ChainBuilder chainBuilder)
{
return chainBuilder.build(Dispatcher.class, configuration);
- }</pre>
-</div></div>
+ }</plain-text-body>
<p><a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/ioc/services/ChainBuilder.html">ChainBuilder</a> is a service that <em>builds other services</em>. Here it creates an object of type Dispatcher in terms of the list of Dispatchers. This is one of the most common uses of service builder methods ... for when the service implementation doesn't exist, but can be constructed at runtime.</p>
@@ -216,8 +196,7 @@ public void contributeMasterDispatcher(O
<p>The first step is to contribute values.</p>
-<div class="code panel pdl" style="border-style: solid;border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: false; theme: Default" style="font-size:12px;">
+<parameter ac:name="borderStyle">solid</parameter><plain-text-body>
public static void contributeFactoryDefaults(MappedConfiguration<String, String> configuration)
{
configuration.add(SymbolConstants.FILE_CHECK_INTERVAL, "1000"); // 1 second
@@ -231,13 +210,13 @@ public void contributeMasterDispatcher(O
"org/apache/tapestry5/scriptaculous_1_7_1_beta_3");
configuration.add("tapestry.jscalendar.path", "org/apache/tapestry5/jscalendar-1.0");
configuration.add("tapestry.jscalendar", "classpath:${tapestry.jscalendar.path}");
- }</pre>
-</div></div>
+ }</plain-text-body>
<p>These contribution set up a number of defaults used to configure various Tapestry services. As you can see, you can even define symbol values in terms of other symbol values.</p>
<p>Mapped configurations don't have to be keyed on Strings (enums or Class are other common key types). When a mapped configuration <em>is</em> keyed on String, then a case-insensitive map is used.</p>
-</div>
+
+<plain-text-body>{scrollbar}</plain-text-body></div>
</div>
<div class="clearer"></div>
Modified: websites/production/tapestry/content/ioc-cookbook.html
==============================================================================
--- websites/production/tapestry/content/ioc-cookbook.html (original)
+++ websites/production/tapestry/content/ioc-cookbook.html Tue Sep 26 19:20:27 2017
@@ -27,16 +27,6 @@
</title>
<link type="text/css" rel="stylesheet" href="/resources/space.css" />
- <link href='/resources/highlighter/styles/shCoreCXF.css' rel='stylesheet' type='text/css' />
- <link href='/resources/highlighter/styles/shThemeCXF.css' rel='stylesheet' type='text/css' />
- <script src='/resources/highlighter/scripts/shCore.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushJava.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushXml.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushPlain.js' type='text/javascript'></script>
- <script>
- SyntaxHighlighter.defaults['toolbar'] = false;
- SyntaxHighlighter.all();
- </script>
<link href="/styles/style.css" rel="stylesheet" type="text/css"/>
@@ -77,58 +67,7 @@
</div>
<div id="content">
- <div id="ConfluenceContent"><p>Tapestry <strong>Inversion of Control</strong> (IoC), though originally designed specifically for the needs of the Tapestry web framework, may also be employed as a stand-alone IoC container, separate from the rest of Tapestry.</p><div class="aui-label" style="float:right" title="Related Articles">
-
-
-
-
-
-
-
-
-<h3>Related Articles</h3>
-
-<ul class="content-by-label"><li>
- <div>
- <span class="icon aui-icon aui-icon-small aui-iconfont-page-default" title="Page">Page:</span> </div>
-
- <div class="details">
- <a href="ioc.html">IOC</a>
-
-
- </div>
- </li><li>
- <div>
- <span class="icon aui-icon aui-icon-small aui-iconfont-page-default" title="Page">Page:</span> </div>
-
- <div class="details">
- <a href="ioc-cookbook.html">IoC cookbook</a>
-
-
- </div>
- </li><li>
- <div>
- <span class="icon aui-icon aui-icon-small aui-iconfont-page-default" title="Page">Page:</span> </div>
-
- <div class="details">
- <a href="tapestry-ioc-overview.html">Tapestry IoC Overview</a>
-
-
- </div>
- </li><li>
- <div>
- <span class="icon aui-icon aui-icon-small aui-iconfont-page-default" title="Page">Page:</span> </div>
-
- <div class="details">
- <a href="tapestry-inversion-of-control-faq.html">Tapestry Inversion of Control FAQ</a>
-
-
- </div>
- </li></ul>
-</div>
-
-
-<p>Tapestry IoC is a sophisticated tool that takes some experience to use properly.</p><p>The IOC documentation in the User Guide is factually correct, but it is designed more as a reference, rather than giving the big picture. In this Cookbook, we'll show a bit more about how to use Tapestry IoC, using real examples from the Tapestry code base (both the tapestry-ioc and tapestry-core modules).</p><p>A word of caution: several of the examples have been taken from Tapestry's <em>internal</em> code base. Tapestry internals are private, subject to change at any time, so be aware that if you go peeking at the internal source code, it may have changed since the corresponding documentation was written.</p><p><strong>Contents:</strong></p><ul><li><a href="ioc-cookbook-basic-services-and-injection.html">Basic Services and Injection</a></li><li><a href="ioc-cookbook-overriding-ioc-services.html">Overriding Tapestry IoC Services</a></li><li><a href="ioc-cookbook-patterns.html">Using Patter
ns</a></li><li><a href="ioc-cookbook-service-configurations.html">Service Configurations</a></li></ul></div>
+ <div id="ConfluenceContent"><p><plain-text-body>{scrollbar}</plain-text-body></p><parameter ac:name="hidden">true</parameter><parameter ac:name="atlassian-macro-output-type">BLOCK</parameter><rich-text-body><p>A tutorial for using Tapestry's Inversion of Control container</p></rich-text-body><p>Tapestry <strong>Inversion of Control</strong> (IoC), though originally designed specifically for the needs of the Tapestry web framework, may also be employed as a stand-alone IoC container, separate from the rest of Tapestry.</p><parameter ac:name="style">float:right</parameter><parameter ac:name="title">Related Articles</parameter><parameter ac:name="class">aui-label</parameter><rich-text-body><parameter ac:name="showLabels">false</parameter><parameter ac:name="showSpace">false</parameter><parameter ac:name="title">Related Articles</parameter><parameter ac:name="cql">label = "ioc" and space = currentSpace()</parameter></rich-text-body><p>Tapestry IoC is a sophisticated tool
that takes some experience to use properly.</p><p>The IOC documentation in the User Guide is factually correct, but it is designed more as a reference, rather than giving the big picture. In this Cookbook, we'll show a bit more about how to use Tapestry IoC, using real examples from the Tapestry code base (both the tapestry-ioc and tapestry-core modules).</p><p>A word of caution: several of the examples have been taken from Tapestry's <em>internal</em> code base. Tapestry internals are private, subject to change at any time, so be aware that if you go peeking at the internal source code, it may have changed since the corresponding documentation was written.</p><p><strong>Contents:</strong></p><ul><li><a href="ioc-cookbook-basic-services-and-injection.html">Basic Services and Injection</a></li><li><a href="ioc-cookbook-overriding-ioc-services.html">Overriding Tapestry IoC Services</a></li><li><a href="ioc-cookbook-patterns.html">Using Patterns</a></li><li><a href="ioc-cookbook-s
ervice-configurations.html">Service Configurations</a></li></ul></div>
</div>
<div class="clearer"></div>
Modified: websites/production/tapestry/content/javascript-faq.html
==============================================================================
--- websites/production/tapestry/content/javascript-faq.html (original)
+++ websites/production/tapestry/content/javascript-faq.html Tue Sep 26 19:20:27 2017
@@ -27,16 +27,6 @@
</title>
<link type="text/css" rel="stylesheet" href="/resources/space.css" />
- <link href='/resources/highlighter/styles/shCoreCXF.css' rel='stylesheet' type='text/css' />
- <link href='/resources/highlighter/styles/shThemeCXF.css' rel='stylesheet' type='text/css' />
- <script src='/resources/highlighter/scripts/shCore.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushJava.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushXml.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushPlain.js' type='text/javascript'></script>
- <script>
- SyntaxHighlighter.defaults['toolbar'] = false;
- SyntaxHighlighter.all();
- </script>
<link href="/styles/style.css" rel="stylesheet" type="text/css"/>
@@ -77,7 +67,7 @@
</div>
<div id="content">
- <div id="ConfluenceContent"><h2 id="JavaScriptFAQ-JavaScript">JavaScript</h2><p>Main article: <a href="legacy-javascript.html">Legacy JavaScript</a></p><h3 id="JavaScriptFAQ-WhydoIgeta"Tapestryisundefined"erroronformsubmit?(5.3andearlier)">Why do I get a "Tapestry is undefined" error on form submit? (5.3 and earlier)</h3><p>This client-side error is clear but can be awkward to solve. It means your browser has not been able to load the tapestry.js file properly. The question is, why? It can be due to multiple reasons, some of them below:</p><ul><li>First, check if 'tapestry.js' is present in the head part of your resulting HTML page.</li><li><p>If you have set the <a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/SymbolConstants.html#COMBINE_SCRIPTS">tapestry.combine-scripts</a> configuration symbol to true, Tapestry generates one single URL to retrieve all the JS files. Sometimes, this can produce long URLs tha
t browsers are unable to retrieve. Try setting the symbol to false.</p><div class="confluence-information-macro confluence-information-macro-note"><span class="aui-icon aui-icon-small aui-iconfont-warning confluence-information-macro-icon"></span><div class="confluence-information-macro-body"><p>This only applies to Tapestry 5.1.</p></div></div></li><li>If you have included jQuery in conjunction with Tapestry's prototype, that will cause a conflict with the '$' selector used by both. In this case, you should put jQuery on top of the stack and turn on the <a class="external-link" href="http://api.jquery.com/jQuery.noConflict/" rel="nofollow">jQuery.noConflict</a> mode.</li><li>Also, if you have included a custom or third-party JS library on top of the stack that causes the JavaScript parsing to fail, then check the JavaScript syntax in that library.</li><li>If you have used a tool to minimize your JavaScript libraries, this can lead to JavaScript syntax errors, so check if it works
with all the JavaScript files unpacked.</li></ul><h3 id="JavaScriptFAQ-What'sthedifferencebetweentheT5objectandtheTapestryobjectinthebrowser?(5.3andearlier)">What's the difference between the <code>T5</code> object and the <code>Tapestry</code> object in the browser? (5.3 and earlier)</h3><p>Both of these objects are <em>namespaces</em>: containers of functions, constants, and nested namespaces.</p><p>The <code>T5</code> object is a replacement for the <code>Tapestry</code> object, starting in release 5.3. Increasingly, functions defined by the <code>Tapestry</code> object are being replaced with similar or equivalent functions in the <code>T5</code> object.</p><p>This is part of an overall goal, spanning at least two releases of Tapestry, to make Tapestry JavaScript framework agnostic; which is to say, not depend specifically on Prototype or jQuery. Much of the code in the <code>Tapestry</code> object is specifically linked to Prototype and Scriptaculous.</p><p>The <code>T5</code>
object represents a stable, documented, set of APIs that are preferred when building components for maximum portability between underlying JavaScript frameworks. In other words, when building component libraries, coding to the <code>T5</code> object ensures that your component will be useful regardless of whether the final application is built using Prototype, jQuery or something else.</p></div>
+ <div id="ConfluenceContent"><plain-text-body>{scrollbar}</plain-text-body><h2 id="JavaScriptFAQ-JavaScript">JavaScript</h2><p>Main article: <a href="legacy-javascript.html">Legacy JavaScript</a></p><h3 id="JavaScriptFAQ-WhydoIgeta"Tapestryisundefined"erroronformsubmit?(5.3andearlier)">Why do I get a "Tapestry is undefined" error on form submit? (5.3 and earlier)</h3><p>This client-side error is clear but can be awkward to solve. It means your browser has not been able to load the tapestry.js file properly. The question is, why? It can be due to multiple reasons, some of them below:</p><ul><li>First, check if 'tapestry.js' is present in the head part of your resulting HTML page.</li><li><p>If you have set the <a class="external-link" href="http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/SymbolConstants.html#COMBINE_SCRIPTS">tapestry.combine-scripts</a> configuration symbol to true, Tapestry generates one single URL to retrieve all the JS fi
les. Sometimes, this can produce long URLs that browsers are unable to retrieve. Try setting the symbol to false.</p><rich-text-body><p>This only applies to Tapestry 5.1.</p></rich-text-body></li><li>If you have included jQuery in conjunction with Tapestry's prototype, that will cause a conflict with the '$' selector used by both. In this case, you should put jQuery on top of the stack and turn on the <a class="external-link" href="http://api.jquery.com/jQuery.noConflict/" rel="nofollow">jQuery.noConflict</a> mode.</li><li>Also, if you have included a custom or third-party JS library on top of the stack that causes the JavaScript parsing to fail, then check the JavaScript syntax in that library.</li><li>If you have used a tool to minimize your JavaScript libraries, this can lead to JavaScript syntax errors, so check if it works with all the JavaScript files unpacked.</li></ul><h3 id="JavaScriptFAQ-What'sthedifferencebetweentheT5objectandtheTapestryobjectinthebrowser?(5.3andearlier)
">What's the difference between the <code>T5</code> object and the <code>Tapestry</code> object in the browser? (5.3 and earlier)</h3><p>Both of these objects are <em>namespaces</em>: containers of functions, constants, and nested namespaces.</p><p>The <code>T5</code> object is a replacement for the <code>Tapestry</code> object, starting in release 5.3. Increasingly, functions defined by the <code>Tapestry</code> object are being replaced with similar or equivalent functions in the <code>T5</code> object.</p><p>This is part of an overall goal, spanning at least two releases of Tapestry, to make Tapestry JavaScript framework agnostic; which is to say, not depend specifically on Prototype or jQuery. Much of the code in the <code>Tapestry</code> object is specifically linked to Prototype and Scriptaculous.</p><p>The <code>T5</code> object represents a stable, documented, set of APIs that are preferred when building components for maximum portability between underlying JavaScript framew
orks. In other words, when building component libraries, coding to the <code>T5</code> object ensures that your component will be useful regardless of whether the final application is built using Prototype, jQuery or something else.</p></div>
</div>
<div class="clearer"></div>
Modified: websites/production/tapestry/content/limitations.html
==============================================================================
--- websites/production/tapestry/content/limitations.html (original)
+++ websites/production/tapestry/content/limitations.html Tue Sep 26 19:20:27 2017
@@ -27,16 +27,6 @@
</title>
<link type="text/css" rel="stylesheet" href="/resources/space.css" />
- <link href='/resources/highlighter/styles/shCoreCXF.css' rel='stylesheet' type='text/css' />
- <link href='/resources/highlighter/styles/shThemeCXF.css' rel='stylesheet' type='text/css' />
- <script src='/resources/highlighter/scripts/shCore.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushJava.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushXml.js' type='text/javascript'></script>
- <script src='/resources/highlighter/scripts/shBrushPlain.js' type='text/javascript'></script>
- <script>
- SyntaxHighlighter.defaults['toolbar'] = false;
- SyntaxHighlighter.all();
- </script>
<link href="/styles/style.css" rel="stylesheet" type="text/css"/>
@@ -77,8 +67,7 @@
</div>
<div id="content">
- <div id="ConfluenceContent"><h2 id="Limitations-Limitations">Limitations</h2><h3 id="Limitations-HowdoIaddnewcomponentstoanexistingpagedynamically?">How do I add new components to an existing page dynamically?</h3><p>The short answer here is: <strong>you don't</strong>. The long answer here is <strong>you don't have to, to get the behavior you desire</strong>.</p><p>One of Tapestry basic values is high scalability: this is expressed in a number of ways, reflecting scalability concerns within a single server, and within a cluster of servers.</p><p>Although you code Tapestry pages and components as if they were ordinary POJOs (<span style="line-height: 1.4285715;">Plain Old Java Objects -- Tapestry does not require you to extend any base classes or implement any special interfaces)</span><span style="line-height: 1.4285715;">, as deployed by Tapestry they are closer to a traditional servlet: a single instance of each page services requests from multiple threads. Behind
the scenes, Tapestry transforms you code, rewriting it on the fly.</span></p><p>What this means is that <em>any</em> incoming request must be handled by a <em>single page instance</em>. Therefore, Tapestry enforces the concept of <strong>static structure, dynamic behavior</strong>.</p><p>Tapestry provides quite a number of ways to vary what content is rendered, well beyond simple conditionals and loops. It is possible to "drag in" components from other pages when rendering a page (other FAQs will expand on this concept). The point is, that although a Tapestry page's structure is very rigid, the order in which the components of the page render does not have to be top to bottom.</p><h3 id="Limitations-Whydoesn'tmyserviceimplementationreloadwhenIchangeit?">Why doesn't my service implementation reload when I change it?</h3><p>Main article: <a href="service-implementation-reloading.html">Service Implementation Reloading</a></p><p>Live service reloading has some limitations:</p><ul><li>
The service must define a service interface.</li><li>The service implementation must be on the file system (not inside a JAR).</li><li>The implementation must be instantiated by Tapestry, not inside code (even code inside a module class).</li><li>The service must use the default <a href="defining-tapestry-ioc-services.html">scope</a> (reloading of perthread scopes is not supported).</li></ul><p>Consider the following example module:</p><div class="code panel pdl" style="border-width: 1px;"><div class="codeContent panelContent pdl">
-<pre class="brush: java; gutter: true; theme: Default" style="font-size:12px;">public static void bind(ServiceBinder binder)
+ <div id="ConfluenceContent"><plain-text-body>{scrollbar}</plain-text-body><h2 id="Limitations-Limitations">Limitations</h2><h3 id="Limitations-HowdoIaddnewcomponentstoanexistingpagedynamically?">How do I add new components to an existing page dynamically?</h3><p>The short answer here is: <strong>you don't</strong>. The long answer here is <strong>you don't have to, to get the behavior you desire</strong>.</p><p>One of Tapestry basic values is high scalability: this is expressed in a number of ways, reflecting scalability concerns within a single server, and within a cluster of servers.</p><p>Although you code Tapestry pages and components as if they were ordinary POJOs (<span style="line-height: 1.4285715;">Plain Old Java Objects -- Tapestry does not require you to extend any base classes or implement any special interfaces)</span><span style="line-height: 1.4285715;">, as deployed by Tapestry they are closer to a traditional servlet: a single instance of each page s
ervices requests from multiple threads. Behind the scenes, Tapestry transforms you code, rewriting it on the fly.</span></p><p>What this means is that <em>any</em> incoming request must be handled by a <em>single page instance</em>. Therefore, Tapestry enforces the concept of <strong>static structure, dynamic behavior</strong>.</p><p>Tapestry provides quite a number of ways to vary what content is rendered, well beyond simple conditionals and loops. It is possible to "drag in" components from other pages when rendering a page (other FAQs will expand on this concept). The point is, that although a Tapestry page's structure is very rigid, the order in which the components of the page render does not have to be top to bottom.</p><h3 id="Limitations-Whydoesn'tmyserviceimplementationreloadwhenIchangeit?">Why doesn't my service implementation reload when I change it?</h3><p>Main article: <a href="service-implementation-reloading.html">Service Implementation Reloading</a></p><p>Live servi
ce reloading has some limitations:</p><ul><li>The service must define a service interface.</li><li>The service implementation must be on the file system (not inside a JAR).</li><li>The implementation must be instantiated by Tapestry, not inside code (even code inside a module class).</li><li>The service must use the default <a href="defining-tapestry-ioc-services.html">scope</a> (reloading of perthread scopes is not supported).</li></ul><p>Consider the following example module:</p><parameter ac:name="controls">true</parameter><parameter ac:name="linenumbers">true</parameter><plain-text-body>public static void bind(ServiceBinder binder)
{
binder.bind(ArchiveService.class, ArchiveServiceImpl.class);
}
@@ -91,8 +80,7 @@ public static JobQueue buildJobQueue(Mes
return service;
}
-</pre>
-</div></div><p>ArchiveService is reloadable, because Tapestry instantiates <code>ArchiveServiceImpl</code> itself. On the other hand, Tapestry invokes <code>buildJobQueue()</code> and it is your code inside the method that instantiates <code>JobQueueImpl</code>, so the JobQueue service will not be reloadable.</p><p>Finally, only classes whose class files are stored directly on the file system, and not packaged inside JARs, are ever reloadable ... generally, only the services of the application being built (and not services from libraries) will be stored on the file system. This reflects the intent of reloading: as an agile development tool, but not something to be used in deployment.</p><h3 id="Limitations-HowdoIrunmultipleTapestryapplicationsinthesamewebapplication?">How do I run multiple Tapestry applications in the same web application?</h3><p>Running multiple Tapestry 5 applications is not supported; there's only one place to identify the application root package, so even config
uring multiple filters into multiple folders will not work.</p><p>Support for multiple Tapestry applications in the same web application was a specific non-goal in Tapestry 5 (it needlessly complicated Tapestry 4). Given how loosely connected Tapestry 5 pages are from each other, there doesn't seem to be an advantage to doing so ... and certainly, in terms of memory utilization, there is a significant down side, were it even possible.</p><p>You <em>can</em> <span style="color: rgb(0,0,0);">run a Tapestry 4 app and a Tapestry 5 app side-by-side (the package names are different, for just this reason), but they know nothing of each other, and can't interact directly. This is just like the way you could have a single WAR with multiple servlets; the different applications can only communicate via URLs, or shared state in the HttpSession.</span></p><p> </p><p> </p><p> </p></div>
+</plain-text-body><p>ArchiveService is reloadable, because Tapestry instantiates <code>ArchiveServiceImpl</code> itself. On the other hand, Tapestry invokes <code>buildJobQueue()</code> and it is your code inside the method that instantiates <code>JobQueueImpl</code>, so the JobQueue service will not be reloadable.</p><p>Finally, only classes whose class files are stored directly on the file system, and not packaged inside JARs, are ever reloadable ... generally, only the services of the application being built (and not services from libraries) will be stored on the file system. This reflects the intent of reloading: as an agile development tool, but not something to be used in deployment.</p><h3 id="Limitations-HowdoIrunmultipleTapestryapplicationsinthesamewebapplication?">How do I run multiple Tapestry applications in the same web application?</h3><p>Running multiple Tapestry 5 applications is not supported; there's only one place to identify the application root package, so even
configuring multiple filters into multiple folders will not work.</p><p>Support for multiple Tapestry applications in the same web application was a specific non-goal in Tapestry 5 (it needlessly complicated Tapestry 4). Given how loosely connected Tapestry 5 pages are from each other, there doesn't seem to be an advantage to doing so ... and certainly, in terms of memory utilization, there is a significant down side, were it even possible.</p><p>You <em>can</em> <span style="color: rgb(0,0,0);">run a Tapestry 4 app and a Tapestry 5 app side-by-side (the package names are different, for just this reason), but they know nothing of each other, and can't interact directly. This is just like the way you could have a single WAR with multiple servlets; the different applications can only communicate via URLs, or shared state in the HttpSession.</span></p><plain-text-body>{scrollbar}</plain-text-body><p> </p><p> </p><p> </p></div>
</div>
<div class="clearer"></div>