Stand-alone client - lookup problem

Question

I have a stand-alone Java client application (ContactClient) that I want to use to access an EJB called Contact. I am using J2EE, deploying with deploytool. The EJB has a JNDI name of "MyContact", and the Client reference is "ejb/TheContact". The relevant code in the app is:
try
java.util.Properties props = new java.util.Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.cosnaming.CNCtxFactory");
props.put(Context.PROVIDER_URL, "iiop://localhost:1050");
Context initial = new InitialContext(props);
Object objref = initial.lookup("ejb/TheContact");
ContactHome home =
(ContactHome)PortableRemoteObject.narrow(objref,
ContactHome.class);
contact = home.create();
catch (Exception ex)
System.err.println("Exception: " + ex.getMessage());
ex.printStackTrace();
The following exception is thrown by initial.lookup("ejb/TheContact");
javax.naming.NameNotFoundException. Root exception is org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0
I have tried changing the name to "TheContact", and to "java:comp/env/TheContact" with no success. If I change it to the JNDI name "MyContact", the lookup works, but the following call, PortableRemoteObject.narrow(), throws a java.lang.ClassCastException.
What am I doing wrong?
John

Answer 1

Hi, Thanks for your fast reply, but it still doesn't work.
With your Code I get a classCastException in this line:
"SessionHome home = (SessionHome)ctx.lookup("SessionBeanInstance");"
Here is the code from the whole thing, as it works with the appclient script:
SessionHome: //RemoteHomeInterface
package ejb;
import java.rmi.RemoteException;
import javax.ejb.CreateException;
import javax.ejb.EJBHome;
public interface SessionHome extends EJBHome {
Session create() throws RemoteException, CreateException;
Session //Session RemoteInterface
package ejb;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
public interface Session extends EJBObject {
public String getString() throws RemoteException;
SessionBeanInstance //The SessionBean
package ejb;
import javax.ejb.SessionBean;
import javax.ejb.CreateException;
import javax.ejb.SessionContext;
public class SessionBeanInstance implements SessionBean{
public SessionContext context;
public String getString(){ return "works"; }
public SessionBeanInstance() {  }
public void ejbCreate() throws CreateException { System.out.println("Bean created"); }
public void ejbActivate() {  }
public void ejbPassivate() {  }
public void ejbRemove() {  }
public void setSessionContext(SessionContext ctx) {  context = ctx;  }
clientMain //The client class
package client;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.naming.NamingEnumeration;
import javax.rmi.PortableRemoteObject;
import ejb.*;
import java.util.Hashtable;
public class clientMain {
private SessionHome home;
private Session mySession;
private Context ctx;
private Object objref;
public clientMain() {
try{
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.cosnaming.CNCtxFactory");
env.put(Context.PROVIDER_URL, "iiop://127.0.0.1:3700");
try{
Context ctx = new InitialContext(env);
SessionHome home = (SessionHome)ctx.lookup("SessionBeanInstance");
Session remote = (Session)home.create();
String test = remote.getString();
System.out.println(test);
catch(Exception e){ e.printStackTrace(); }
catch (Exception ex) { 
System.err.println("Caught an exception.");
ex.printStackTrace();
The error occurs only if is start with the "java -jar" script. Here is the error:
lang.ClassCastException: com.sun.corba.se.impl.corba.CORBAObjectImpl
at client.clientMain.<init>(clientMain.java:27)
at client.Client.main(Client.java:10)
I don't know what to do, to get it work...