如何使用JBoss 6将EJB3会话bean注入另一个会话bean

时间：2011-06-20 12:57:14

标签： ejb-3.0 jboss6.x myfaces

我正在尝试将我没有参与的项目从JBoss 4迁移到JBoss 6.该项目由EJB 3后端和MyFaces 1.1.4前端组成。我已经在JBoss 6 jsf部署者中包含了MyFaces 1.1.4库。

我通过辅助类从前端到后端函数调用。

    PatientControllerEJB patientModule = BusinessHelper.getPatientServices();  
    patientModule.canCreatePatVisit( getUserContainer().getClientId(), patId, vType);

在调用之后，我在会话bean patientModule中的后端canCreatePatVisit函数中得到NullPointerException。

    @Stateless
    public class PatientControllerEJBBean extends ASBusinessLogicClass implements PatientControllerEJBLocal, PatientControllerEJBRemote {
        @Resource private SessionContext sessionCtx = null;

        @PersistenceContext(unitName="amedPU") EntityManager em;
        @EJB private AdminControllerEJBLocal admContr;
        @EJB private ConfigControllerEJBLocal confContr;

        ...

        public void canCreatePatVisit(int clientId, int patId, int visitTypeId) throws ValidationException {
            IVisitType vt = admContr.getVisitType(visitTypeId);
        ...
        }
    ...
    }

我调试了项目，我发现em，admContr和confContr都是null。所以我想在另一个会话bean中注入会话bean有问题，但我不知道是什么。

我已经在前端将web.xml版本更改为2.5，并且我正在使用JBoss 6库。任何帮助，将不胜感激。

我在下面包含了一部分堆栈跟踪，以防它可能有用。

Caused by: javax.ejb.EJBException: java.lang.NullPointerException
    at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.handleExceptionInOurTx(CMTTxInterceptor.java:183)
    at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:251)
    at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.required(CMTTxInterceptor.java:349)
    at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invoke(CMTTxInterceptor.java:209)
    at org.jboss.ejb3.tx2.aop.CMTTxInterceptorWrapper.invoke(CMTTxInterceptorWrapper.java:52)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:182)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.core.context.CurrentInvocationContextInterceptor.invoke(CurrentInvocationContextInterceptor.java:47)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.interceptor.EJB3TCCLInterceptor.invoke(EJB3TCCLInterceptor.java:86)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:392)
    at org.jboss.ejb3.remoting.IsLocalInterceptor.invokeLocal(IsLocalInterceptor.java:88)
    at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:75)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.async.impl.interceptor.AsynchronousClientInterceptor.invoke(AsynchronousClientInterceptor.java:143)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:62)
    at $Proxy404.invoke(Unknown Source)
    at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:185)
    at $Proxy407.canCreatePatVisit(Unknown Source)
    at com.atkosoft.cm.faces.patient.NewVisitForm.initFormWithMenuId(NewVisitForm.java:225)
    at com.atkosoft.cm.faces.patient.PatientSearchForm.goToDestination(PatientSearchForm.java:1302)
    ... 52 more
Caused by: java.lang.NullPointerException
    at com.atkosoft.cm.patient.bizlogic.PatientControllerEJBBean.canCreatePatVisit(PatientControllerEJBBean.java:1856)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111)
    at org.jboss.ejb3.interceptors.container.ContainerMethodInvocationWrapper.invokeNext(ContainerMethodInvocationWrapper.java:72)
    at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.invoke(InterceptorSequencer.java:76)
    at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.aroundInvoke(InterceptorSequencer.java:62)
    at sun.reflect.GeneratedMethodAccessor568.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.jboss.aop.advice.PerJoinpointAdvice.invoke(PerJoinpointAdvice.java:174)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.fillMethod(InvocationContextInterceptor.java:74)
    at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_fillMethod_476205266.invoke(InvocationContextInterceptor_z_fillMethod_476205266.java)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:90)
    at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_476205266.invoke(InvocationContextInterceptor_z_setup_476205266.java)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.async.impl.interceptor.AsynchronousServerInterceptor.invoke(AsynchronousServerInterceptor.java:128)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:62)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:56)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:68)
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
    at org.jboss.ejb3.core.context.SessionInvocationContextAdapter.proceed(SessionInvocationContextAdapter.java:95)
    at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:247)
    ... 84 more

2 个答案:

答案 0 :(得分：1)

这可能与JBoss相关的查找问题。

请使用带有EJB Annotation的mappedName属性。这应该是JBoss容器中的全局JNDI名称。 JBoss将mappedName识别为您引用的EJB的全局JNDI名称。如果已指定mappedName，则忽略所有其他属性，并使用此全局JNDI名称进行绑定。 

@EJB(mappedName="AdminControllerEJBBean/local")
private AdminControllerEJBLocal admContr;

答案 1 :(得分：0)

我认为只能对Container发起的bean进行依赖注入。

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