ClassCastException - App Client

Question

Hi, I'm running an application client to test a program, but I keep getting a java.lang.ClassCastException.
Error message:
java.lang.ClassCastException at com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(PortableRemotObject.java:293)
at javax.rmi.PortableRemoteObject.narrow(PortableRemotObject.java:134)
at VehicleClient.main(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflec......
The client program is named VehicleClient. I'm able to deploy the application in deploytool and verify with no failures. But when I run my client application, I get the above error.
VehicleClient.java codes:
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
import java.util.*;
import javax.ejb.*;
public class VehicleClient {
public static void main(String[] args) {
boolean results = false;
try {
Context initial = new InitialContext();
Object objref = initial.lookup("java:comp/env/ejb/MyVehicleManagerHome");
VehicleManagerHome home=
(VehicleManagerHome)PortableRemoteObject.narrow(objref,
VehicleManagerHome.class);
VehicleManager VM = home.create();
/********ERROR in following statement*******************/
results = VM.selectVehicleByPrimaryKey("123");
if (results == true)
System.out.println("The Vehicle exists");
else
System.out.println("The Vehicle does not exist");
System.exit(0);
} catch (Exception ex) {
ex.printStackTrace();
Any help is much appreciated! Either reply to this message or email me at [email protected]
Thanks!

Answer 1

You need to populate your InitialContext object with the values for the URL of the container on which your bean is deployed and the JNDI service provider's factory class name like this -
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
    <JNDI provider's factory class name>);
env.put(Context.PROVIDER_URL, <container_url>);
Context ctx = new InitialContext(env);Then use this context object to perform your bean lookup.
Hope this helps.