Problem with deployment sample ejb application

[Karol Kornecki]

Hi,

I have some trouble with deploying sample apps... Sample comes from EJB 3.0 books. When I deploying it using ant script I get following exception:

run.client:
     [java] Exception in thread "main" java.lang.ClassCastException
     [java] 	at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:229)
     [java] 	at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
     [java] 	at com.titan.clients.Client.main(Client.java:20)
     [java] Caused by: java.lang.ClassCastException: javax.naming.Reference cannot be cast to org.omg.CORBA.Object
     [java] 	at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:212)
     [java] 	... 2 more
     [java] Java Result: 1
  
 

package com.titan.clients;
import com.titan.travelagent.TravelAgentRemote;
import com.titan.domain.Cabin;
import javax.naming.InitialContext;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;

public class Client
{
    public static void main(String [] args)
    {
        try
        {
            Context jndiContext = getInitialContext();
            Object ref = jndiContext.lookup("TravelAgentBean/remote");
            TravelAgentRemote dao = (TravelAgentRemote)  PortableRemoteObject.narrow(ref,TravelAgentRemote.class);      // this line cause an exception
      //more code here....
  

I'm beginner in EJB and I don't know how to solve this problem.

[Jaikiran Pai]

Which version of JBoss AS? You probably don't have jbossall-client.jar (and the list of jars in its META-INF/MANIFEST.MF for AS-5) in the client classpath. Point your client classpath to JBOSS_HOME/client/jbossall-client.jar.

[Karol Kornecki]

I've Jboss-5.0.0.GA and I've jbossall-client.jar in JBOSS_HOME/client directory, but I don't have any jar's list in MANIFEST.MF file just:

    
Manifest-Version: 1.0

Ant-Version: Apache Ant 1.6.2

Created-By: 14.2-b01 (Sun Microsystems Inc.

I've added jbossall-client.jar to my CLASSPATH but it gives me the same exception

[Peter Johnson]

Sample comes from EJB 3.0 books.

Are you sure that you are reading an EJB 3 book? These line, which causes the exception, looks like an EJB 2 line:

TravelAgentRemote dao = (TravelAgentRemote)  PortableRemoteObject.narrow(ref,TravelAgentRemote.class); 

With EJB3, you should use:

TravelAgentRemote dao = (TravelAgentRemote)ref;

The PortableRemoteObject.narrow is required for EJB 2.x, not for EJB 3. If you really got this code from an "EJB3 book", I recommend finding a different book.

By the way, is a JAR file containing TravelAgentRemote in your classpath?

Finally, JBoss in Action has some simple EJB 3 apps that you could use to get started (though the book does not teach EJB3).

[Karol Kornecki]

Sample comes from Enterprise JavaBeans 3.0 Bill Burke, Richard Monson-Haefel 5th edition...
When I've changed for

  TravelAgentRemote dao = (TravelAgentRemote)ref;  

I've got as following:

       [java] Exception in thread "main" java.lang.ClassCastException: javax.naming.Reference cannot be cast to com.titan.travelagent.TravelAgentRemote
     [java] 	at com.titan.clients.Client.main(Client.java:21)
     [java] Java Result: 1
  

[Luke Murphy]

Karol Kornecki wrote:Sample comes from Enterprise JavaBeans 3.0 Bill Burke, Richard Monson-Haefel 5th edition...
When I've changed for

  TravelAgentRemote dao = (TravelAgentRemote)ref;  

I've got as following:

       [java] Exception in thread "main" java.lang.ClassCastException: javax.naming.Reference cannot be cast to com.titan.travelagent.TravelAgentRemote
     [java] 	at com.titan.clients.Client.main(Client.java:21)
     [java] Java Result: 1
  

Any update on this? I have the same problem.