将@Stateful bean注入另一个@Stateful bean [英] Injecting @Stateful bean into another @Stateful bean

问题描述

在glassfish 3.1服务器上，我有一个 @Stateful 会话bean，该会话bean被注入到另一个有状态会话bean中。

On a glassfish 3.1 server, I have a @Stateful session bean which is injected into another stateful session bean.

被注入的有状态会话bean代表了我的实体访问层，它本身就是被 @PersistenceContext 注入的EntityManager，它看起来像这样。

The stateful session bean which is injected presents my entity access layer, it itself has it's EntityManager injected with @PersistenceContext and it looks like this.

@Stateful
MyEAO {
    @PersistenceContext
    EntityManager em;

    MyEAO() {
      // default constructor
    }

    ....
}

此访问层被注入到另一个有状态的bean中：

This access layer is injected into another stateful bean:

@Stateful
public class ShopAdmin implements ShopAdminInterface {
    @EJB MyEAO;

    ....
}

这有效！ -现在，一旦我在MyEAO中添加了另一个构造函数，就将MyEAO注入第二个bean失败了。

This worked! - BUT NOW as soon as I added another constructor to MyEAO, injecting MyEAO into the 2nd bean fails with an exception.

奇怪的是，这两个bean以前都是过去 @Stateless 会话bean，根本没有问题。

The strange thing is, that both beans used to be @Stateless session beans in the past and there were no problems at all.

BTW，我使用了第二个构造函数通过实体管理器进行在玻璃鱼容器之外运行的我的JUnit测试。

BTW, I used the second constructor to pass the entity manager for my JUnit tests which run outside of the glassfish container.

简短：在无状态时代，一切都按预期进行！

Short: In the "stateless era" everything worked as expected!

我是EJB的新手，所以这里我想念什么？

I'm quite new to EJB - so what am I missing here ?

这是堆栈跟踪：

com.sun.faces.mgbean.ManagedBeanCreationException: Bei der Ressourcen-Einspeisung auf dem verwalteten Bean securityGuardBean ist ein Fehler aufgetreten.
at com.sun.faces.mgbean.BeanBuilder.injectResources(BeanBuilder.java:211)
at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:103)
at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409)
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269)
at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244)
at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:99)
at com.sun.el.parser.AstValue.getTarget(AstValue.java:127)
at com.sun.el.parser.AstValue.invoke(AstValue.java:217)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at com.sun.faces.facelets.tag.jsf.core.DeclarativeSystemEventListener.processEvent(EventHandler.java:128)
at javax.faces.component.UIComponent$ComponentSystemEventListenerAdapter.processEvent(UIComponent.java:2508)
at javax.faces.event.SystemEvent.processListener(SystemEvent.java:106)
at com.sun.faces.application.ApplicationImpl.processListeners(ApplicationImpl.java:2129)
at com.sun.faces.application.ApplicationImpl.invokeComponentListenersFor(ApplicationImpl.java:2077)
at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:286)
at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:244)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:108)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:232)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:680)
Caused by: com.sun.faces.spi.InjectionProviderException: com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Local ejb-ref name=de.sdata.service.SecurityGuardBean/sgi,Local 3.x interface =de.sdata.service.SecurityGuardInterface resolved to intra-app EJB SecurityGuard in module sdataEJB.jar,ejb-link=sdataEJB.jar#SecurityGuard,lookup=,mappedName=,jndi-name=,refType=Session into class de.sdata.service.SecurityGuardBean: Lookup failed for 'java:comp/env/de.sdata.service.SecurityGuardBean/sgi' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming}
at org.glassfish.faces.integration.GlassFishInjectionProvider.inject(GlassFishInjectionProvider.java:194)
at com.sun.faces.mgbean.BeanBuilder.injectResources(BeanBuilder.java:205)
... 48 more
Caused by: com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Local ejb-ref name=de.sdata.service.SecurityGuardBean/sgi,Local 3.x interface =de.sdata.service.SecurityGuardInterface resolved to intra-app EJB SecurityGuard in module sdataEJB.jar,ejb-link=sdataEJB.jar#SecurityGuard,lookup=,mappedName=,jndi-name=,refType=Session into class de.sdata.service.SecurityGuardBean: Lookup failed for 'java:comp/env/de.sdata.service.SecurityGuardBean/sgi' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming}
at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:703)
at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.inject(InjectionManagerImpl.java:470)
at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectInstance(InjectionManagerImpl.java:171)
at org.glassfish.faces.integration.GlassFishInjectionProvider.inject(GlassFishInjectionProvider.java:184)
... 49 more
Caused by: javax.naming.NamingException: Lookup failed for 'java:comp/env/de.sdata.service.SecurityGuardBean/sgi' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: No object bound for java:comp/env/de.sdata.service.SecurityGuardBean/sgi [Root exception is java.lang.reflect.UndeclaredThrowableException]]
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:518)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:455)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:599)
... 52 more
Caused by: javax.naming.NameNotFoundException: No object bound for java:comp/env/de.sdata.service.SecurityGuardBean/sgi [Root exception is java.lang.reflect.UndeclaredThrowableException]
at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:242)
at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:498)
... 56 more
Caused by: java.lang.reflect.UndeclaredThrowableException
at $Proxy273.create(Unknown Source)
at com.sun.ejb.EJBUtils.resolveEjbRefObject(EJBUtils.java:366)
at com.sun.ejb.EjbNamingReferenceManagerImpl.resolveEjbReference(EjbNamingReferenceManagerImpl.java:190)
at com.sun.enterprise.container.common.impl.ComponentEnvManagerImpl$EjbReferenceProxy.create(ComponentEnvManagerImpl.java:1106)
at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:776)
at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:744)
at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:172)
... 57 more
Caused by: javax.ejb.CreateException: ERROR creating stateful SessionBean
at com.sun.ejb.containers.StatefulSessionContainer.createEJBLocalBusinessObjectImpl(StatefulSessionContainer.java:551)
at com.sun.ejb.containers.BaseContainer.createEJBLocalBusinessObjectImpl(BaseContainer.java:2486)
at com.sun.ejb.containers.EJBLocalHomeImpl.createEJBLocalBusinessObjectImpl(EJBLocalHomeImpl.java:117)
at com.sun.ejb.containers.EJBLocalHomeInvocationHandler.invoke(EJBLocalHomeInvocationHandler.java:177)
... 64 more
Caused by: java.lang.InstantiationException: de.sdata.service._SecurityGuard_Serializable
at java.lang.Class.newInstance0(Class.java:340)
at java.lang.Class.newInstance(Class.java:308)
at com.sun.ejb.containers.StatefulSessionContainer._constructEJBInstance(StatefulSessionContainer.java:566)
at com.sun.ejb.containers.BaseContainer.createEjbInstanceAndContext(BaseContainer.java:1643)
at com.sun.ejb.containers.StatefulSessionContainer.createBeanInstance(StatefulSessionContainer.java:578)
at com.sun.ejb.containers.StatefulSessionContainer.createEJBLocalBusinessObjectImpl(StatefulSessionContainer.java:532)
... 67 more

推荐答案

我怀疑您在您的类中没有显式的无参数构造函数。

I suspect that you don't have an explicit no-arg constructor in your class.

IMO这不是将特殊的构造函数添加到bean类的好方法，因为您需要
为测试设置一些字段。有一些不错的工具可以为您提供很多技巧。
看看 http://unitils.org/cookbook.html ->测试一个JPA DAO，这应该是您所需要的。

IMO it is not a good solution to add special constructor to the bean class because you need to set some field for the tests. There are some nice tools that can do a lot of tricks for you. Take a look at http://unitils.org/cookbook.html -->Test a JPA DAO which should be what you need.

最好，
A

Best, A

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