[webbeans-dev] Re: [webbeans-commits] Webbeans SVN: r2425 - in extensions/trunk: wicket and 7 other directories.
Pete Muir
pmuir at bleepbleep.org.uk
Sun Apr 19 12:58:38 EDT 2009
Clint, I thought about this some, and an approach is for you to make 3
an optional feature (as it needs more hooks than the 299 api has).
- define an api which allows wicket to control conversations
- use service providers (META-INF/services) to discover impls
- provide a built in impl which can use Web Beans, if it
(WebBeansManager) is on the classpath
- degrade gracefully if no impl is available
I plan to expose an API for managing the contexts lifecycle outside of
servlet/jsf, so you can use that in Web Beans like:
((WebBeansManager) manager).getLifecycle().restoreConversation(id);
--
Pete Muir
http://in.relation.to/Bloggers/Pete
On 16 Apr 2009, at 14:20, Clint Popetz <cpopetz at gmail.com> wrote:
> On Thu, Apr 16, 2009 at 6:27 AM, Pete Muir <pmuir at redhat.com> wrote:
>> Hi Clint,
>>
>> Thanks for this! My only comment is that we should really do this
>> as a
>> library that works for any 299 impl, and isn't tied to Web Beans.
>> This is
>> quite easy to achieve:
>>
>> (1) remove the dependence on webbeans-core
>> (2) extract the non-contextual injection code into a jsr299-utils
>> library
>> and have both the RI and Wicket integration depend on it - this
>> code should
>> basically offer a service to allow injection of non-contextual
>> instances
>> using only 299 apis.
>
> These are the things the wicket integration uses from webbeans-core:
>
> (1) CurrentManager.rootManager(), to obtain the manager instance, i.e.
> the singleton behavior
> (2) WebBeansManager.injectNonContextualInstance, as you mention above
> (3) ConversationContext.INSTANCE/ConversationBeanStore, as I just
> store the cid in wicket and rely on the webbeans-core for threadlocal
> storage of conversational data.
>
> For (1) I could see moving this to jsr299-utils, but the singleton is
> currently set directly by the bootstrap code, which won't work for
> third party implementations. I could have CurrentManager observe
> @Initialized Manager to set its instance.
>
> For (2) there are a lot of dependencies on webbeans-core.
> NonContextualInjector needs to be able to setup/teardown dependent
> scopes, for example, and would also need almost all of
> org.jboss.webbeans.injection. How would that be handled in a
> jsr299-only way?
>
> (3) If the ConversationContext were moved out of the core, all of the
> AbstractMapContext related code would also have to move.
>
> So it's all possible I think, and it's a worthwhile goal. I can take
> it on, but only with a lot of guidance from the list, and it won't
> make be done next week :)
>
> -Clint
>
>
>> Let me know if you want me to work on (2)...
>>
>> On 16 Apr 2009, at 03:14, webbeans-commits at lists.jboss.org wrote:
>>
>>> Author: cpopetz
>>> Date: 2009-04-15 22:14:25 -0400 (Wed, 15 Apr 2009)
>>> New Revision: 2425
>>>
>>> Added:
>>> �extensions/trunk/wicket/
>>> �extensions/trunk/wicket/pom.xml
>>> �extensions/trunk/wicket/src/
>>> �extensions/trunk/wicket/src/main/
>>> �extensions/trunk/wicket/src/main/java/
>>> �extensions/trunk/wicket/src/main/java/org/
>>> �extensions/trunk/wicket/src/main/java/org/jboss/
>>> �extensions/trunk/wicket/src/main/java/org/jboss/webbeans/
>>> �extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wic
>>> ket/
>>>
>>> �extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wick
>>> et/WebBeansApplication.java
>>>
>>> �extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wick
>>> et/WebBeansComponentInstantiationListener.java
>>>
>>> �extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wick
>>> et/WebBeansMetaData.java
>>>
>>> �extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wick
>>> et/WebBeansRequestCycle.java
>>>
>>> �extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wick
>>> et/WebBeansWebRequestCycleProcessor.java
>>> Log:
>>> Initial commit of wicket integration.
>>>
>>>
>>> Added: extensions/trunk/wicket/pom.xml
>>> ===================================================================
>>> --- extensions/trunk/wicket/pom.xml � � � �
>>> � � � � � � � � �
>>> � (rev 0)
>>> +++ extensions/trunk/wicket/pom.xml � � 2009-04-16
>>> 02:14:25 UTC (rev 2425)
>>> @@ -0,0 +1,56 @@
>>> +<project xmlns="http://maven.apache.org/POM/4.0.0"
>>> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>>> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
>>> http://maven.apache.org/maven-v4_0_0.xsd">
>>> + � <parent>
>>> + � � �<artifactId>webbeans-parent</artifactId>
>>> + � � �<groupId>org.jboss.webbeans</groupId>
>>> + � � �<version>1.0.0-SNAPSHOT</version>
>>> + � </parent>
>>> + � <modelVersion>4.0.0</modelVersion>
>>> + � <groupId>org.jboss.webbeans</groupId>
>>> + � <artifactId>webbeans-wicket</artifactId>
>>> + � <version>1.0.0-SNAPSHOT</version>
>>> + � <name>Web Beans Wicket Integration</name>
>>> + � <dependencies>
>>> +
>>> + � � �<dependency>
>>> + � � � � <groupId>org.testng</groupId>
>>> + � � � � <artifactId>testng</artifactId>
>>> + � � � � <scope>test</scope>
>>> + � � � � <classifier>jdk15</classifier>
>>> + � � � � <exclusions>
>>> + � � � � � � � <exclusion>
>>> + � � � � � � � � �
>>> � � <artifactId>junit</artifactId>
>>> + � � � � � � � � �
>>> � � <groupId>junit</groupId>
>>> + � � � � � � � </exclusion>
>>> + � � � � </exclusions>
>>> + � � �</dependency>
>>> + � � �<dependency>
>>> + � � � <groupId>org.jboss.webbeans</groupId>
>>> + � � � <artifactId>jsr299-api</artifactId>
>>> + � � �</dependency>
>>> + � � �<dependency>
>>> + � � � <groupId>org.jboss.webbeans</groupId>
>>> + � � � <artifactId>webbeans-core</artifactId>
>>> + � � � <scope>provided</scope>
>>> + � � �</dependency>
>>> + � � � <dependency>
>>> + � � � � � � �
>>> <groupId>org.apache.wicket</groupId>
>>> + � � � � � � �
>>> <artifactId>wicket</artifactId>
>>> + � � � � � � � <version>$
>>> {wicket.version}</version>
>>> + � � � </dependency>
>>> + � <dependency>
>>> + � � � � � � �
>>> <groupId>javax.servlet</groupId>
>>> + � � � � � � �
>>> <artifactId>servlet-api</artifactId>
>>> + � � � � � � � <scope>provided</
>>> scope>
>>> + � </dependency>
>>> +
>>> + � </dependencies>
>>> +
>>> + � <build>
>>> + � � �<defaultGoal>install</defaultGoal>
>>> + � </build>
>>> +
>>> + � � � <properties>
>>> + � � � � � � �
>>> <wicket.version>1.3-SNAPSHOT</wicket.version>
>>> + � � � </properties>
>>> +
>>> +</project>
>>>
>>> Added:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansApplication.java
>>> ===================================================================
>>> ---
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansApplication.java
>>> � � � � � � � � �
>>> � � � � � � �(rev 0)
>>> +++
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansApplication.java
>>> � � � �2009-04-16 02:14:25 UTC (rev 2425)
>>> @@ -0,0 +1,54 @@
>>> +package org.jboss.webbeans.wicket;
>>> +
>>> +
>>> +import org.apache.wicket.Request;
>>> +import org.apache.wicket.RequestCycle;
>>> +import org.apache.wicket.Response;
>>> +import org.apache.wicket.protocol.http.WebApplication;
>>> +import org.apache.wicket.protocol.http.WebRequest;
>>> +import org.apache.wicket.protocol.http.WebResponse;
>>> +import org.apache.wicket.request.IRequestCycleProcessor;
>>> +
>>> +/**
>>> + * A convenience subclass of wicket's WebApplication which adds
>>> the hooks
>>> necessary to use JSR-299 injections
>>> + * in wicket components, as well as manage JSR-299 conversation
>>> scopes
>>> with Wicket page metadata. �If you have
>>> + * your own WebApplication subclass, and can't subclass this
>>> class, you
>>> just need to do the three things that this
>>> + * class does, i.e. register the
>>> WebBeansComponentInstantiationListener,
>>> and override the two methods below to return
>>> + * the RequestCycle and IRequestCycleProcessor subclasses
>>> specific to
>>> WebBeans, or your subclasses of those classes.
>>> + * @author cpopetz
>>> + *
>>> + * @see WebApplication
>>> + * @see WebBeansWebRequestCycleProcessor
>>> + * @see WebBeansRequestCycle
>>> + */
>>> +public abstract class WebBeansApplication extends WebApplication
>>> +{
>>> + � /**
>>> + � �* Use the constructor to add our component
>>> instantiation listener
>>> + � �* @see WebBeansComponentInstantiationListener
>>> + � �*/
>>> + � public WebBeansApplication()
>>> + � {
>>> + � � �addComponentInstantiationListener(new
>>> WebBeansComponentInstantiationListener());
>>> + � }
>>> +
>>> + � /**
>>> + � �* Override to return our WebBeans-specific request
>>> cycle processor
>>> + � �* @see WebBeansWebRequestCycleProcessor
>>> + � �*/
>>> + � @Override
>>> + � protected IRequestCycleProcessor newRequestCycleProcessor()
>>> + � {
>>> + � � �return new WebBeansWebRequestCycleProcessor();
>>> + � }
>>> +
>>> + � /**
>>> + � �* Override to return our WebBeans-specific request c
>>> ycle
>>> + � �* @see WebBeansRequestCycle
>>> + � �*/
>>> + � @Override
>>> + � public RequestCycle newRequestCycle(final Request request,
>>> final
>>> Response response)
>>> + � {
>>> + � � �return new WebBeansRequestCycle(this,
>>> (WebRequest) request,
>>> (WebResponse) response);
>>> + � }
>>> +}
>>>
>>>
>>> Property changes on:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansApplication.java
>>> ___________________________________________________________________
>>> Name: svn:executable
>>> �+ *
>>>
>>> Added:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansComponentInstantiationListener.java
>>> ===================================================================
>>> ---
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansComponentInstantiationListener.java
>>> � � � � � � � � �
>>> � � � � � (rev 0)
>>> +++
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansComponentInstantiationListener.java
>>> � � 2009-04-16 02:14:25 UTC (rev 2425)
>>> @@ -0,0 +1,20 @@
>>> +package org.jboss.webbeans.wicket;
>>> +
>>> +import org.apache.wicket.Component;
>>> +import
>>> org.apache.wicket.application.IComponentInstantiationListener;
>>> +import org.jboss.webbeans.CurrentManager;
>>> +import org.jboss.webbeans.manager.api.WebBeansManager;
>>> +
>>> +/**
>>> + * This listener uses the WebBeansManager to handle injections
>>> for all
>>> wicket components.
>>> + * @author cpopetz
>>> + * @see WebBeansManager
>>> + *
>>> + */
>>> +public class WebBeansComponentInstantiationListener implements
>>> IComponentInstantiationListener
>>> +{
>>> + � public void onInstantiation(Component component)
>>> + � {
>>> + � � �((WebBeansManager)
>>> CurrentManager.
>>> rootManager()).injectNonContextualInstance(component);
>>> + � }
>>> +}
>>> \ No newline at end of file
>>>
>>>
>>> Property changes on:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansComponentInstantiationListener.java
>>> ___________________________________________________________________
>>> Name: svn:executable
>>> �+ *
>>>
>>> Added:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansMetaData.java
>>> ===================================================================
>>> ---
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansMetaData.java
>>> � � � � � � � � �
>>> � � � � (rev 0)
>>> +++
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansMetaData.java
>>> � 2009-04-16 02:14:25 UTC (rev 2425)
>>> @@ -0,0 +1,21 @@
>>> +package org.jboss.webbeans.wicket;
>>> +
>>> +import org.apache.wicket.MetaDataKey;
>>> +
>>> +/**
>>> + * Public storage for the metadata key used by the WebBeans
>>> integration
>>> to store
>>> + * conversation ids in wicket page metadata.
>>> + * @author cpopetz
>>> + *
>>> + */
>>> +public class WebBeansMetaData
>>> +{
>>> +
>>> + � /**
>>> + � �* This is the key we will use to to store the
>>> conversation metadata
>>> in the
>>> + � �* wicket page.
>>> + � �*/
>>> + � public static final MetaDataKey CID = new MetaDataKey(Stri
>>> ng.class) {
>>> + � � �private static final long serialVersionUID =
>>> -8788010688731927318L;
>>> + � };
>>> +}
>>>
>>>
>>> Property changes on:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansMetaData.java
>>> ___________________________________________________________________
>>> Name: svn:executable
>>> �+ *
>>>
>>> Added:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansRequestCycle.java
>>> ===================================================================
>>> ---
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansRequestCycle.java
>>> � � � � � � � � �
>>> � � � � � � (rev 0)
>>> +++
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansRequestCycle.java
>>> � � � 2009-04-16 02:14:25 UTC (rev 2425)
>>> @@ -0,0 +1,108 @@
>>> +package org.jboss.webbeans.wicket;
>>> +
>>> +import javax.context.Conversation;
>>> +import javax.inject.manager.Manager;
>>> +
>>> +import org.apache.wicket.IRequestTarget;
>>> +import org.apache.wicket.Page;
>>> +import org.apache.wicket.Response;
>>> +import org.apache.wicket.protocol.http.WebApplication;
>>> +import org.apache.wicket.protocol.http.WebRequest;
>>> +import org.apache.wicket.protocol.http.WebRequestCycle;
>>> +import
>>> org.
>>> apache.
>>> wicket.request.target.component.BookmarkablePageRequestTarget;
>>> +import
>>> org.apache.wicket.request.target.component.IPageRequestTarget;
>>> +import org.jboss.webbeans.CurrentManager;
>>> +import org.jboss.webbeans.context.ConversationContext;
>>> +import org.jboss.webbeans.conversation.ConversationManager;
>>> +import org.jboss.webbeans.servlet.ConversationBeanStore;
>>> +
>>> +/**
>>> + * WebBeansRequestCycle is a subclass of the standard wicket
>>> WebRequestCycle which:
>>> + * <ul>
>>> + * <li>restores long-running conversations specified in wicket page
>>> metadata when a page target is first used.
>>> + * <li>propagates long running conversations to new page targets by
>>> specifying the above metadata
>>> + * <li>propagates long running conversations across redirects
>>> through the
>>> use of a request parameter if the
>>> + * redirect is handled with a BookmarkablePageRequest
>>> + * <li> Sets up the conversational context
>>> + * </ul>
>>> + * @see WebBeansWebRequestCycleProcessor Which handles
>>> propogation of
>>> conversation data for newly-started
>>> + * long running conversations, by storing their ids in the page
>>> metadata
>>> + * @author cpopetz
>>> + *
>>> + */
>>> +public class WebBeansRequestCycle extends WebRequestCycle
>>> +{
>>> + � public WebBeansRequestCycle(WebApplication application, We
>>> bRequest
>>> request, Response response)
>>> + � {
>>> + � � �super(application, request, response);
>>> + � }
>>> +
>>> + � /**
>>> + � �* Override to set up the conversation context and to
>>> choose the
>>> conversation if a conversation id
>>> + � �* is present in target metadata.
>>> + � �*/
>>> + � @Override
>>> + � protected void onRequestTargetSet(IRequestTarget target)
>>> + � {
>>> + � � �super.onRequestTargetSet(target);
>>> +
>>> + � � �Page page = null;
>>> + � � �if (target instanceof IPageRequestTarget)
>>> + � � �{
>>> + � � � � page = ((IPageRequestTarget)
>>> target).getPage();
>>> + � � �}
>>> +
>>> + � � �//Two possible specifications of cid: page
>>> metadata or request url;
>>> the latter is used
>>> + � � �//to propagate the conversation to mounted
>>> (bookmarkable) paths
>>> after a redirect
>>> +
>>> + � � �String specifiedCid = null;
>>> + � � �if (page != null)
>>> + � � �{
>>> + � � � � specifiedCid = (String)
>>> page.getMetaData(WebBeansMetaData.CID);
>>> + � � �}
>>> + � � �else
>>> + � � �{
>>> + � � � � specifiedCid =
>>> request.getParameter("cid");
>>> + � � �}
>>> +
>>> + � � �Manager manager = CurrentManager.rootManage
>>> r();
>>> + � � �Conversation conversation =
>>> manager.getInstanceByType(Conversation.class);
>>> +
>>> + � � �//restore a conversation if it exists
>>> + � � �if (specifiedCid != null)
>>> + � � �{
>>> + � � � � // Restore this conversation
>>> +
>>> manager.
>>> getInstanceByType(
>>> ConversationManager.class).beginOrRestoreConversation(specifiedCid);
>>> + � � �}
>>> +
>>> + � � �//handle propagation of existing long running
>>> converstaions to new
>>> targets
>>> + � � �if (conversation.isLongRunning())
>>> + � � �{
>>> + � � � � //Note that we can't propagate
>>> conversations with other redirect
>>> targets like
>>> + � � � � //RequestRedirectTarget through this
>>> mechanism, because it does
>>> not provide an
>>> + � � � � //interface to modify its target URL.
>>> �If propagation with those
>>> targets is to be supported,
>>> + � � � � //it needs a custom Response subclass.
>>> + � � � � if (isRedirect() && target instanceof
>>> BookmarkablePageRequestTarget)
>>> + � � � � {
>>> + � � � � �
>>> �BookmarkablePageRequestTarget bookmark =
>>> (BookmarkablePageRequestTarget) target;
>>> + � � � � � �//if a cid has already
>>> been specified, don't override it
>>> + � � � � � �if (!
>>> bookmark.getPageParameters().containsKey("cid"))
>>> + � � � � � � �
>>> bookmark.getPageParameters().add("cid",
>>> conversation.getId());
>>> + � � � � }
>>> +
>>> + � � � � //If we have a target page, propagate
>>> the conversation to the
>>> page's metadata
>>> + � � � � if (page != null)
>>> + � � � � {
>>> + � � � � �
>>> �page.setMetaData(WebBeansMetaData.CID, conversation.getId());
>>> + � � � � }
>>> + � � �}
>>> +
>>> + � � �//Now set up the conversational context if it
>>> isn't already
>>> + � � �if (!ConversationContext.INSTANCE.isActive())
>>> + � � �{
>>> + � � � � ConversationContext.INSTANCE.setBeanSt
>>> ore(
>>> + � � � � � � � new
>>> ConversationBeanStore(
>>> ((WebRequest)request).getHttpServletRequest().getSession(),
>>> conversation.getId()));
>>> + � � � �
>>> ConversationContext.INSTANCE.setActive(true);
>>> + � � �}
>>> + � }
>>> +}
>>> \ No newline at end of file
>>>
>>>
>>> Property changes on:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansRequestCycle.java
>>> ___________________________________________________________________
>>> Name: svn:executable
>>> �+ *
>>>
>>> Added:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansWebRequestCycleProcessor.java
>>> ===================================================================
>>> ---
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansWebRequestCycleProcessor.java
>>> � � � � � � � � �
>>> � � � � (rev 0)
>>> +++
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansWebRequestCycleProcessor.java
>>> � 2009-04-16 02:14:25 UTC (rev 2425)
>>> @@ -0,0 +1,44 @@
>>> +package org.jboss.webbeans.wicket;
>>> +
>>> +import javax.context.Conversation;
>>> +
>>> +import org.apache.wicket.Page;
>>> +import org.apache.wicket.RequestCycle;
>>> +import org.apache.wicket.protocol.http.WebRequestCycleProcessor;
>>> +import org.jboss.webbeans.CurrentManager;
>>> +import org.jboss.webbeans.context.ConversationContext;
>>> +import org.jboss.webbeans.conversation.ConversationManager;
>>> +
>>> +/**
>>> + * WebBeansWebRequestCycleProcessor is a subclass of the standard
>>> wicket
>>> WebRequestCycleProcessor which saves the conversation id
>>> + * of any long-running cornversation in wicket page metadata. ï
>>> ¿½It also
>>> cleans up the conversation context.
>>> + *
>>> + * @author cpopetz
>>> + *
>>> + */
>>> +
>>> +public class WebBeansWebRequestCycleProcessor extends
>>> WebRequestCycleProcessor
>>> +{
>>> + � /**
>>> + � �* If a long running conversation has been started,
>>> store its id into
>>> page metadata
>>> + � �*/
>>> + � @Override
>>> + � public void respond(RequestCycle requestCycle)
>>> + � {
>>> + � � �super.respond(requestCycle);
>>> + � � �Conversation conversation =
>>> CurrentManager.rootManager().getInstanceByType(Conversation.class);
>>> + � � �if (conversation.isLongRunning())
>>> + � � �{
>>> + � � � � Page page =
>>> RequestCycle.get().getResponsePage();
>>> + � � � � if (page != null)
>>> + � � � � {
>>> + � � � � �
>>> �page.setMetaData(WebBeansMetaData.CID, conversation.getId());
>>> + � � � � }
>>> + � � �}
>>> +
>>> + � � �//cleanup and deactivate the conversation con
>>> text
>>> +
>>> +
>>> �CurrentManager.rootManager().getInstanceByType(ConversationMa
>>> nager.class).cleanupConversation();
>>> + � � �ConversationContext.INSTANCE.setActive(false);
>>> + � }
>>> +}
>>> \ No newline at end of file
>>>
>>>
>>> Property changes on:
>>> extensions/trunk/wicket/src/main/java/org/jboss/webbeans/wicket/
>>> WebBeansWebRequestCycleProcessor.java
>>> ___________________________________________________________________
>>> Name: svn:executable
>>> �+ *
>>>
>>> _______________________________________________
>>> webbeans-commits mailing list
>>> webbeans-commits at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/webbeans-commits
>>
>> --
>> Pete Muir
>> http://www.seamframework.org
>> http://in.relation.to/Bloggers/Pete
>>
>>
>
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> webbeans-dev mailing list
> webbeans-dev at lists.jboss.org
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