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How to inject EJB3 session bean into another session bean with JBoss 6
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created by <a href="http://community.jboss.org/people/g_stam">Giorgos Stamateris</a> in <i>EJB3 Development</i> - <a href="http://community.jboss.org/message/611582#611582">View the full discussion</a>
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<div class="jive-rendered-content"><p>I'm trying to migrate a project from JBoss 4 to JBoss 6. The project consists of an EJB 3 backend and a MyFaces 1.1.4 frontend. I have included the MyFaces 1.1.4 libraries in the JBoss 6 jsf deployer.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have a call from the frontend to a backend function through a helper class.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><em style="font-size: 10pt;">PatientControllerEJB patientModule = BusinessHelper.getPatientServices();  </em></p><p><em style="font-size: 10pt;">patientModule.canCreatePatVisit( getUserContainer().getClientId(), patId, vType);</em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>After that call I get a NullPointerException at the backend canCreatePatVisit function, in the session bean patientModule.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><em>@Stateless</em></p><p><em>public class PatientControllerEJBBean extends ASBusinessLogicClass implements PatientControllerEJBLocal, PatientControllerEJBRemote {</em></p><p><em>    @Resource private SessionContext sessionCtx = null;</em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><em>    @PersistenceContext(unitName="amedPU") EntityManager em;</em></p><p><em>    @EJB private AdminControllerEJBLocal admContr;</em></p><p><em>    @EJB private ConfigControllerEJBLocal confContr;</em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><em>    ...</em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><em>    public void canCreatePatVisit(int clientId, int patId, int visitTypeId) throws ValidationException {</em></p><p><em>        IVisitType vt = admContr.getVisitType(visitTypeId);</em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><em>        ...</em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><em>    }       </em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><em>    ...</em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><em>}</em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I debugged the project and I found out that em, admContr and confContr are all null. So I suppose there is a problem injecting a session bean in another session bean but I don't know what.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have changed the web.xml version to 2.5 in the frontend and I am using the JBoss 6 libraries. Any help would be appreciated.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm including a portion of the stacktrace below in case it might be helpful.</p><p>  </p><p><span style="font-size: 8pt;">Caused by: javax.ejb.EJBException: java.lang.NullPointerException</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.handleExceptionInOurTx(CMTTxInterceptor.java:183)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:251)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.required(CMTTxInterceptor.java:349)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invoke(CMTTxInterceptor.java:209)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.tx2.aop.CMTTxInterceptorWrapper.invoke(CMTTxInterceptorWrapper.java:52)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:182)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.core.context.CurrentInvocationContextInterceptor.invoke(CurrentInvocationContextInterceptor.java:47)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.interceptor.EJB3TCCLInterceptor.invoke(EJB3TCCLInterceptor.java:86)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:392)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.remoting.IsLocalInterceptor.invokeLocal(IsLocalInterceptor.java:88)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:75)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.async.impl.interceptor.AsynchronousClientInterceptor.invoke(AsynchronousClientInterceptor.java:143)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:62)</span></p><p><span style="font-size: 8pt;">  at $Proxy404.invoke(Unknown Source)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:185)</span></p><p><span style="font-size: 8pt;">  at $Proxy407.canCreatePatVisit(Unknown Source)</span></p><p><span style="font-size: 8pt;">  at com.atkosoft.cm.faces.patient.NewVisitForm.initFormWithMenuId(NewVisitForm.java:225)</span></p><p><span style="font-size: 8pt;">  at com.atkosoft.cm.faces.patient.PatientSearchForm.goToDestination(PatientSearchForm.java:1302)</span></p><p><span style="font-size: 8pt;">  ... 52 more</span></p><p><span style="font-size: 8pt;">Caused by: java.lang.NullPointerException</span></p><p><span style="font-size: 8pt;">  at com.atkosoft.cm.patient.bizlogic.PatientControllerEJBBean.canCreatePatVisit(PatientControllerEJBBean.java:1856)</span></p><p><span style="font-size: 8pt;">  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)</span></p><p><span style="font-size: 8pt;">  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)</span></p><p><span style="font-size: 8pt;">  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)</span></p><p><span style="font-size: 8pt;">  at java.lang.reflect.Method.invoke(Unknown Source)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.interceptors.container.ContainerMethodInvocationWrapper.invokeNext(ContainerMethodInvocationWrapper.java:72)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.invoke(InterceptorSequencer.java:76)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.aroundInvoke(InterceptorSequencer.java:62)</span></p><p><span style="font-size: 8pt;">  at sun.reflect.GeneratedMethodAccessor568.invoke(Unknown Source)</span></p><p><span style="font-size: 8pt;">  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)</span></p><p><span style="font-size: 8pt;">  at java.lang.reflect.Method.invoke(Unknown Source)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.advice.PerJoinpointAdvice.invoke(PerJoinpointAdvice.java:174)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.fillMethod(InvocationContextInterceptor.java:74)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_fillMethod_476205266.invoke(InvocationContextInterceptor_z_fillMethod_476205266.java)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:90)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_476205266.invoke(InvocationContextInterceptor_z_setup_476205266.java)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.async.impl.interceptor.AsynchronousServerInterceptor.invoke(AsynchronousServerInterceptor.java:128)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:62)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:56)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:68)</span></p><p><span style="font-size: 8pt;">  at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.core.context.SessionInvocationContextAdapter.proceed(SessionInvocationContextAdapter.java:95)</span></p><p><span style="font-size: 8pt;">  at org.jboss.ejb3.tx2.impl.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:247)</span></p><p><span style="font-size: 8pt;">  ... 84 more</span></p></div>
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