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From "Timothy Ward (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ARIES-703) JDKProxyManager cannot proxy blueprint beans
Date Fri, 03 Feb 2012 14:39:53 GMT

    [ https://issues.apache.org/jira/browse/ARIES-703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199740#comment-13199740
] 

Timothy Ward commented on ARIES-703:
------------------------------------

It's not possible to absolutely solve this problem. If the bean is created through the blueprint
API, or if it gets injected into another bean that refers to it by a class, or if it is exposed
as a service using a service interface that is not a Java interface. I can however add support
that means we only proxy at the last possible second when we know what type(s) are required.
As long as you inject via interface this should solve your problem.
                
> JDKProxyManager cannot proxy blueprint beans
> --------------------------------------------
>
>                 Key: ARIES-703
>                 URL: https://issues.apache.org/jira/browse/ARIES-703
>             Project: Aries
>          Issue Type: Bug
>          Components: Blueprint
>         Environment: Glassfish 3.1
>            Reporter: Balazs Zsoldos
>            Assignee: Timothy Ward
>
> When there is no ASM between the bundles and aries proxy is installed the default proxy
manager is JDKProxyManager. When there is a bean in a blueprint fragment that has for example
tx:transaction inside creating the transactional proxy fails with the following stacktrace:
> [#|2011-07-06T14:29:24.542+0200|SEVERE|glassfish3.1|org.apache.aries.blueprint.container.BlueprintContainerImpl|_ThreadID=27;_ThreadName=Thread-1;|Unable
to start blueprint container for bundle biz.everit.audit.persistence.biz.everit.audit.persistence.impl
> org.osgi.service.blueprint.container.ComponentDefinitionException: Unable to create proxy
for bean eventPersistenceImpl in bundle biz.everit.audit.persistence.biz.everit.audit.persistence.impl
version 0.1.0.SNAPSHOT
> 	at org.apache.aries.blueprint.container.BeanRecipe.addInterceptors(BeanRecipe.java:695)
> 	at org.apache.aries.blueprint.container.BeanRecipe.internalCreate(BeanRecipe.java:730)
> 	at org.apache.aries.blueprint.di.AbstractRecipe$1.call(AbstractRecipe.java:71)
> 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> 	at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:79)
> 	at org.apache.aries.blueprint.di.RefRecipe.internalCreate(RefRecipe.java:60)
> 	at org.apache.aries.blueprint.di.AbstractRecipe.create(AbstractRecipe.java:98)
> 	at org.apache.aries.blueprint.container.BlueprintRepository.createInstances(BlueprintRepository.java:220)
> 	at org.apache.aries.blueprint.container.BlueprintRepository.createInstance(BlueprintRepository.java:205)
> 	at org.apache.aries.blueprint.container.BlueprintRepository.create(BlueprintRepository.java:144)
> 	at org.apache.aries.blueprint.container.ServiceRecipe.createRecipe(ServiceRecipe.java:398)
> 	at org.apache.aries.blueprint.container.ServiceRecipe.createService(ServiceRecipe.java:271)
> 	at org.apache.aries.blueprint.container.ServiceRecipe.internalGetService(ServiceRecipe.java:243)
> 	at org.apache.aries.blueprint.container.ServiceRecipe.getService(ServiceRecipe.java:320)
> 	at org.apache.aries.blueprint.container.ServiceRecipe$TriggerServiceFactory.getService(ServiceRecipe.java:465)
> 	at org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:310)
> 	at org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:221)
> 	at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:297)
> 	at org.apache.felix.framework.Felix.getService(Felix.java:3014)
> 	at org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:329)
> 	at org.jvnet.hk2.osgiadapter.HK2Main$HK2ServiceTrackerCustomizer.addingService(HK2Main.java:260)
> 	at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:896)
> 	at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:261)
> 	at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:233)
> 	at org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:840)
> 	at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:871)
> 	at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:733)
> 	at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:662)
> 	at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:3769)
> 	at org.apache.felix.framework.Felix.access$000(Felix.java:80)
> 	at org.apache.felix.framework.Felix$2.serviceChanged(Felix.java:722)
> 	at org.apache.felix.framework.ServiceRegistry.registerService(ServiceRegistry.java:107)
> 	at org.apache.felix.framework.Felix.registerService(Felix.java:2854)
> 	at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:251)
> 	at org.apache.aries.blueprint.container.BlueprintContainerImpl.registerService(BlueprintContainerImpl.java:408)
> 	at org.apache.aries.blueprint.container.ServiceRecipe.register(ServiceRecipe.java:187)
> 	at org.apache.aries.blueprint.container.BlueprintContainerImpl.registerServices(BlueprintContainerImpl.java:666)
> 	at org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:334)
> 	at org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:230)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> 	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
> 	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:662)
> Caused by: org.apache.aries.proxy.UnableToProxyException: The class biz.everit.audit.persistence.impl.EventPersistenceServiceImpl
is not an interface and therefore a proxy cannot be generated.
> 	at org.apache.aries.proxy.impl.JdkProxyManager.getInterfaces(JdkProxyManager.java:43)
> 	at org.apache.aries.proxy.impl.JdkProxyManager.createNewProxy(JdkProxyManager.java:36)
> 	at org.apache.aries.proxy.impl.AbstractProxyManager.createDelegatingInterceptingProxy(AbstractProxyManager.java:75)
> 	at org.apache.aries.proxy.impl.AbstractProxyManager.createInterceptingProxy(AbstractProxyManager.java:53)
> 	at org.apache.aries.blueprint.container.BeanRecipe.addInterceptors(BeanRecipe.java:690)
> 	... 47 more
> It will always happen as we have the following line in BeanRecepe:
> intercepted = BlueprintExtender.getProxyManager().createInterceptingProxy(b, 
>                   ProxyUtils.asList(original.getClass()), original, 
>                   new Collaborator(interceptorLookupKey, interceptors));
> That means that the interface list is the class of the bean itself that is cannot be
an interface. In case of JDKProxy we should derive the interfaces that the bean implements
and those interface classes should be passed. However at this level (BeanRecipe) we do not
know about the proxy manager...
> The example blueprint file for this:
> <bean id="eventPersistenceImpl" class="biz.everit.audit.persistence.impl.EventPersistenceServiceImpl">
> 		<tx:transaction method="*" value="Required" />
> 		<jpa:context property="em" unitname="biz.everit.audit.persistence.entity" type="TRANSACTION"
/>
> </bean>

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