[jboss-user] [EJB 3.0] - Simple injection of SessionContext not working

Tuesday, 25 July 2006

I have just started with EJB3. Certainly, i am doing something wrong, because a simple
injection is not working for me. I have StatelessSessionBean in which i am trying to
inject the SessionContext. When i am trying to deploy the bean, server throws exceptions
indicating a NullPointerException and subsequently the application is not deployed.

Here's the code:

  | package org.myapp.ejb;
  | 
  | import java.util.Random;
  | 
  | import javax.annotation.Resource;
  | import javax.annotation.security.PermitAll;
  | import javax.annotation.security.RolesAllowed;
  | import javax.ejb.SessionContext;
  | import javax.ejb.Stateless;
  | import javax.jms.Queue;
  | 
  | import org.jboss.annotation.security.SecurityDomain;
  | 
  | @Stateless
  | @SecurityDomain("other")
  | public class TestEJB3 implements TestEJB3Interface {
  | 
  |                 @Resource
  |                     SessionContext sessionContext;	
  | 
  | 	@PermitAll
  | 	public void print() {
  | 		System.out.println("Print Default: Hi");
  | 	}
  | 
  | 	@RolesAllowed({"Admin"})
  | 	public String getDisplayValue() {
  | 		return "Hi, user: " + new Random().nextInt();
  | 	}
  | 
  | 	@RolesAllowed({"AnyUser"})
  | 	public void print(String text) {
  | 		System.out.println("Print: " + text);
  | 	}
  | 	
  | 
  | 	
  | }

Here's the exception stacktrace when the application is being deployed:

anonymous wrote : 12:52:11,816 INFO  [EARDeployer] Init J2EE application:
file:/D:/JBoss4.0.4GCA/jboss-4.0.4.GA/server/default/deploy/MyEJB3.ear/
  | 12:52:12,160 INFO  [Ejb3Deployment] EJB3 deployment time took: 188
  | 12:52:12,270 INFO  [JmxKernelAbstraction] installing MBean:
jboss.j2ee:ear=MyEJB3.ear,jar=myapp_ejb.jar,name=TestEJB3,service=EJB3 with dependencies:
  | 12:52:12,691 WARN  [ServiceController] Problem starting service
jboss.j2ee:ear=MyEJB3.ear,jar=myapp_ejb.jar,name=TestEJB3,service=EJB3
  | java.lang.NullPointerException
  |         at
org.jboss.ejb3.injection.ResourceHandler.loadFieldInjectors(ResourceHandler.java:283)     
  at org.jboss.ejb3.injection.ResourceHandler.loadInjectors(ResourceHandler.java:401)
  |         at
org.jboss.ejb3.injection.ResourceHandler.loadInjectors(ResourceHandler.java:381)
  |         at org.jboss.ejb3.EJBContainer.resolveInjectors(EJBContainer.java:640)
  |         at org.jboss.ejb3.EJBContainer.initializePool(EJBContainer.java:576)
  |         at org.jboss.ejb3.EJBContainer.start(EJBContainer.java:507)
  |         at org.jboss.ejb3.SessionContainer.start(SessionContainer.java:82)
  |         at
org.jboss.ejb3.stateless.StatelessContainer.start(StatelessContainer.java:80)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.ejb3.ServiceDelegateWrapper.startService(ServiceDelegateWrapper.java:99)
  |         at
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
  |         at
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
  |         at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
  |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |         at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
  |         at
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
  |         at $Proxy0.start(Unknown Source)
  |         at org.jboss.system.ServiceController.start(ServiceController.java:417)
  |         at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
  |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |         at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
  |         at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
  |         at $Proxy56.start(Unknown Source)
  |         at org.jboss.ejb3.JmxKernelAbstraction.install(JmxKernelAbstraction.java:82)
  |         at
org.jboss.ejb3.Ejb3Deployment.registerEJBContainer(Ejb3Deployment.java:439)
  |         at org.jboss.ejb3.Ejb3Deployment.start(Ejb3Deployment.java:486)
  |         at org.jboss.ejb3.Ejb3Module.startService(Ejb3Module.java:139)
  |         at
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
  |         at
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
  |         at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
  |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |         at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
  |         at
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
  |         at $Proxy0.start(Unknown Source)
  |         at org.jboss.system.ServiceController.start(ServiceController.java:417)
  |         at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
  |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |         at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
  |         at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
  |         at $Proxy29.start(Unknown Source)
  |         at org.jboss.ejb3.EJB3Deployer.start(EJB3Deployer.java:449)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
  |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
  |         at
org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
  |         at
org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
  |         at
org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
  |         at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
  |         at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
  |         at $Proxy30.start(Unknown Source)
  |         at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1007)
  |         at org.jboss.deployment.MainDeployer.start(MainDeployer.java:997)
  |         at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:808)
  |         at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:771)
  |         at sun.reflect.GeneratedMethodAccessor49.invoke(Unknown Source)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
  |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
  |         at
org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
  |         at
org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
  |         at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
  |         at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
  |         at $Proxy8.deploy(Unknown Source)
  |         at
org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
  |         at
org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:634)
  |         at
org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
  |         at
org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:336)
  |         at
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
  |         at
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
  |         at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
  |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |         at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
  |         at
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
  |         at $Proxy0.start(Unknown Source)
  |         at org.jboss.system.ServiceController.start(ServiceController.java:417)
  |         at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
  |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
  |         at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
  |         at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
  |         at $Proxy4.start(Unknown Source)
  |         at org.jboss.deployment.SARDeployer.start(SARDeployer.java:302)
  |         at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1007)
  |         at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:808)
  |         at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:771)
  |         at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:755)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
  |         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
  |         at
org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
  |         at
org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
  |         at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
  |         at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
  |         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
  |         at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
  |         at $Proxy5.deploy(Unknown Source)
  |         at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:482)
  |         at org.jboss.system.server.ServerImpl.start(ServerImpl.java:362)
  |         at org.jboss.Main.boot(Main.java:200)
  |         at org.jboss.Main$1.run(Main.java:464)
  |         at java.lang.Thread.run(Thread.java:595)
  | 12:52:13,457 INFO  [EJB3Deployer] Deployed:
file:/D:/JBoss4.0.4GCA/jboss-4.0.4.GA/server/default/deploy/MyEJB3.ear/myapp_ejb.jar/
  | 12:52:13,473 INFO  [TomcatDeployer] deploy, ctxPath=/myapp,
warUrl=.../deploy/MyEJB3.ear/myapp_web.war/
  | 12:52:13,770 INFO  [EARDeployer] Started J2EE application:
file:/D:/JBoss4.0.4GCA/jboss-4.0.4.GA/server/default/deploy/MyEJB3.ear/
  | 12:52:13,785 ERROR [URLDeploymentScanner] Incomplete Deployment listing:
  | 
  | --- MBeans waiting for other MBeans ---
  | ObjectName: jboss.j2ee:ear=MyEJB3.ear,jar=myapp_ejb.jar,name=TestEJB3,service=EJB3
  |   State: FAILED
  |   Reason: java.lang.NullPointerException
  | 
  | --- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM ---
  | ObjectName: jboss.j2ee:ear=MyEJB3.ear,jar=myapp_ejb.jar,name=TestEJB3,service=EJB3
  |   State: FAILED
  |   Reason: java.lang.NullPointerException

I am using JBoss - 4.0.4 GCA. I followed the following steps after installing the server:

1) I downloaded jboss-EJB-3.0_RC8-FD
2) Copied ejb3-persistence.jar in server/default/lib
3) Copied ejb3-interceptors-aop.xml in server/default/deploy
4) ejb3.deployer in server/default/deploy

Is there something else, i need to do to get injection working? Note that with the
injection part commented out, everything works fine, the EJB gets deployed and i am able
to invoke methods on the EJB.

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[jboss-user] [EJB 3.0] - Simple injection of SessionContext not working