Dear JBoss experts,
I tried my own "hello world" with EJB3 on JBoss 4.0.5GA today. But when I
invoke a method on my SLSB, I am getting this stack:
[java] log4j:WARN No appenders could be found for logger
(org.jboss.security.SecurityAssociation).
[java] log4j:WARN Please initialize the log4j system properly.
[java] java.lang.NullPointerException
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[java] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[java] at java.lang.reflect.Method.invoke(Method.java:585)
[java] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
[java] at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:263)
[java] at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
[java] at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
[java] at
org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:828)
[java] at
org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:681)
[java] at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:358)
[java] at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:398)
[java] at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:239)
[java] at
org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:190)
[java] at org.jboss.remoting.Client.invoke(Client.java:525)
[java] at org.jboss.remoting.Client.invoke(Client.java:488)
[java] at
org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:55)
[java] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
[java] at
org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
[java] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
[java] at
org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53)
[java] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
[java] at
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:77)
[java] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
[java] at
org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:102)
[java] at $Proxy0.ping(Unknown Source)
[java] at ....EJB3TestClient.main(EJB3TestClient.java:38)
Does the log4j warning has to do with it? Looking at the stack I doubt it.
My SLSB is pretty simple:
1. a remote interface:
package ...;
|
| @javax.ejb.Remote
| public interface EJB3StatelessTestSessionFacade
| {
| public String ping();
| }
|
2. the bean:
package ...;
|
| @javax.ejb.Stateless
| public class EJB3StatelessTestSessionBean
| implements EJB3StatelessTestSessionFacade
| {
| public String ping()
| {
| return "pong ";
| }
| }
3. a client:
package ...;
|
| import java.util.Properties;
| import javax.ejb.EJB;
| import javax.naming.InitialContext;
|
| public class EJB3TestClient
| {
| @EJB public static EJB3StatelessTestSessionFacade aFacade;
|
| /**
| * @param args
| */
| public static void main(String[] args)
| {
| try
| {
| Properties p = new Properties();
| p.put("java.naming.factory.initial",
"org.jnp.interfaces.NamingContextFactory");
|
p.put("java.naming.factory.url.pkgs","=org.jboss.naming:org.jnp.interfaces");
| p.put("java.naming.provider.url","localhost:1099");
|
p.put("jnp.socket.Factory","org.jnp.interfaces.TimedSocketFactory");
|
| System.out.println( "getting initial context" );
| InitialContext aIC = new InitialContext(p);
|
| if ( aFacade == null )
| {
| System.out.println( "session bean lookup" );
| aFacade = (EJB3StatelessTestSessionFacade)
| aIC.lookup(
"java:ejb3test/EJB3StatelessTestSessionBean/remote" );
| }
|
| System.out.println( "calling session bean" );
| System.out.println( aFacade.ping() );
| }
| catch ( Exception aExc )
| {
| aExc.printStackTrace(System.err);
| }
| }
|
| }
Any idea what I am doing wrong?
Thanks!
... Michael
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