ClassCastException calling EJB from EJB (diff EARs) Urgent please help !!

Question

Hi,
I�m trying to call a Remote EJB ( in jdev BBEAN.prj ) from another EJB (in jdev ABEAN.prj) located in a different EAR.
In JDEVELOPER (oc4j 9.0.3) I also considered BBEAN as a libreary which is included in the ABEAN project.
So that the ABEAN JAR contains the class definition for the Home and remote interface.
From the ABEAN bean I call this code:
DO ()
private static Context getInitialContext() throws NamingException
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.rmi.RMIInitialContextFactory");
env.put(Context.SECURITY_PRINCIPAL, "admin");
env.put(Context.SECURITY_CREDENTIALS, "manager");
env.put(Context.PROVIDER_URL, "ormi://GSARNO-1/BBean");
return new InitialContext(env);
BBeanHome BBeanHome = (BBeanHome)PortableRemoteObject.narrow(context.lookup("BBean"), BBeanHome.class);
BBean bBean;
������������..
After having deployed both projects I then run a client (Calling the Do function).
Doing so I keep receiving the following error when calling narrow.
java.lang.ClassCastException
java.lang.Object com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(java.lang.Object, java.lang.Class)
PortableRemoteObject.java:296
java.lang.Object javax.rmi.PortableRemoteObject.narrow(java.lang.Object, java.lang.Class)
PortableRemoteObject.java:137
java.lang.String mypackage1.impl.MySessionEJBBean.Do()
MySessionEJBBean.java:39
java.lang.String MySessionEJB_StatelessSessionBeanWrapper6.Do()
MySessionEJB_StatelessSessionBeanWrapper6.java:85
java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[])
native code
void com.evermind.server.rmi.RMICallHandler.run(java.lang.Thread)
RMICallHandler.java:119
void com.evermind.server.rmi.RMICallHandler.run()
RMICallHandler.java:48
void EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run()
PooledExecutor.java:803
void java.lang.Thread.run()
Thread.java:484
Can anyone help ?
What should I do to call remote e/o local interfaces located on different EARs ?
I�m using OC4J 9.0.3

Answer 1

Hi Giuseppe,
If both EAR files are in the same OC4J instance you do not have to use RMIInitialContextFactory to invoke the EJB. You have to do the following:
In OC4J
1) Make the BBEAN as the parent for ABEAN application defined in the server.xml as follows:
application name="ABEAN" path="../applications/abean.ear" parent="BBEAN" auto-start="true" />
2)
You can define ejb-ref or ejb-local-ref in the deployment descriptor of your application
3) You can use the default InitialContext to lookup your EJB as if both EJBs are in the same application
regards
Debu