[jboss-user] [EJB 3.0] - Re: ClassCastExeption while invoking a Bean

[atul.iims2005]

Dear Sir,

           I am new to ejb, my problem is when i run my client program i get this error.
Anyone suggest me what i am doing wrong...........

This is my Exception which is generated during the client program execute.......

Exception in thread "main" java.lang.ClassCastException
        at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:229)
        at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
        at Client.main(Client.java:27)
Caused by: java.lang.ClassCastException: $Proxy0 cannot be cast to org.omg.CORBA.Object
        at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:212)
        ... 2 more

 Could anyone tell me what I’m doing wrong? Thanks a lot. Looking forward to hearing from you.

These are my code..........

********remote interface*******
package My;

import java.rmi.*;

import javax.ejb.*;

public interface DemoInter extends EJBObject
{
           public int add() throws RemoteException;
}

************home interface***********
package My;

import javax.ejb.*;
import java.rmi.*;



public interface DemoHome extends EJBHome
{
public DemoInter create(int a, int b) throws CreateException,RemoteException;
}
*************bean class*************

package My;

import javax.ejb.*;
import java.rmi.*;

public class DemoBean implements SessionBean
{
 int a,b;
private SessionContext context;
   public void setSessionContext(SessionContext ctx){this.context=ctx}
 
   public void ejbCreate( int a,int b)
   {
                this.a=a;
                this.b=b;
          System.out.println("ejb Created");
   }
 
    public void ejbActivate(){System.out.println("ejbActivate()");}
    public void ejbPassivate(){System.out.println("ejbPassivate()");}
    public void ejbRemove(){System.out.println("distroyed");}
    public int add() throws RemoteException
    {
           return(a+b);
    }
}



***********my client**************




import java.util.*;
import javax.rmi.PortableRemoteObject;
import javax.naming.*;
import javax.rmi.*;
import My.*;


public class Client {

        /**
         * @param args
         */
        public static void main(String[] args) {
                // TODO Auto-generated method stub
                try {
                       
                        Properties properties=new Properties();
            properties.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.RemoteInitialContextFactory");
            properties.put("java.naming.provider.url","ejbd://localhost:4201");
                       
            Context ctx=new InitialContext(properties);
                        System.out.println("ic = " + ctx);
                       
                        //MyTimeLocal myTimeLocal = (MyTimeLocal)context.lookup("java:comp/env/ejb/MyTimeBean");
                       // My.DemoInter remoteObj =(My.DemoInter)ctx.lookup("ejb/mgmt/MEJBRemoteHome");
                       Object object=ctx.lookup("ejb/mgmt/MEJBRemoteHome");
                       // System.out.println("hello" +object);
                        My.DemoHome ejbHome =(My.DemoHome)PortableRemoteObject.narrow(object,My.DemoHome.class);
          System.out.println("hello" +ejbHome);                      
  My.DemoInter obj1=ejbHome.create(4,5);
  System.out.println(obj1.add());




                                                                                       
                } catch (Exception e) {
                        System.out.println(e);
                        // TODO: handle exception
                }
                       
               

        }

}


this is log file..........

13:02:24,839 INFO  [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'
13:02:30,987 INFO  [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'
13:02:34,611 INFO  [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'
13:02:35,732 INFO  [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'
13:02:40,045 INFO  [config] Configuring Service(id=Default Stateless Container, type=Container, provider-id=Default Stateless Container)
13:02:40,045 INFO  [config] Configuring Service(id=Default Stateful Container, type=Container, provider-id=Default Stateful Container)
13:02:40,045 INFO  [config] Configuring Service(id=Default BMP Container, type=Container, provider-id=Default BMP Container)
13:02:40,046 INFO  [config] Configuring Service(id=Default CMP Container, type=Container, provider-id=Default CMP Container)
13:02:40,046 INFO  [config] Configuring app: default/ejbsample1.jar/1207553559310/jar
13:02:40,078 INFO  [OpenEJB] Auto-deploying ejb DemoEJB: EjbDeployment(deployment-id=ejbsample1.jar/DemoEJB)
13:02:40,079 INFO  [config] Loaded Module: default/ejbsample1.jar/1207553559310/jar
13:02:40,976 INFO  [startup] Assembling app: /home/atul/santemp/geronimo-tomcat6-javaee5-2.1/var/temp/geronimo-deployer17419.tmpdir/ejbsample1.jar
13:02:40,985 INFO  [startup] Jndi(name=DemoEJBRemoteHome) --> Ejb(deployment-id=ejbsample1.jar/DemoEJB)
13:02:40,985 INFO  [startup] Created Ejb(deployment-id=ejbsample1.jar/DemoEJB, ejb-name=DemoEJB, container=Default Stateless Container)
13:02:40,985 INFO  [startup] Deployed Application(path=/home/atul/santemp/geronimo-tomcat6-javaee5-2.1/var/temp/geronimo-deployer17419.tmpdir/ejbsample1.jar)
13:02:41,083 INFO  [SupportedModesServiceImpl] Portlet mode 'edit' not found for portletId: '/plugin.Deployment!227983155|0'



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