Access remote objects with an RMI client by creating an initial context and performing a lookup

Question

I'm trying to look up the PublicRepository class from an EJB on a Weblogic 10 server. This is the piece of code:

/**
     * RMI/IIOP clients should use this narrow function
     */
private static Object narrow(Object ref, Class c) {
    return PortableRemoteObject.narrow(ref, c);
}

/**
 * Lookup the EJBs home in the JNDI tree
 */
private static PublicRepository lookupHome() throws NamingException {
    // Lookup the beans home using JNDI
    Context ctx = getInitialContext();

    try {

        Object home = ctx.lookup("cea");
        return (PublicRepository) narrow(home, PublicRepository.class);

    } catch(NamingException ne) {
        System.out.println("The client was unable to lookup the EJBHome.  Please make sure ");
        System.out.println("that you have deployed the ejb with the JNDI name "
        + "cea" + " on the WebLogic server at " + "iiop://localhost:7001");
        throw ne;
    }
}


private static Context getInitialContext() throws NamingException {

    try {
        // Get an InitialContext
        Properties h = new Properties();
        h.put(Context.INITIAL_CONTEXT_FACTORY,
        "weblogic.jndi.WLInitialContextFactory");
        h.put(Context.PROVIDER_URL, "iiop://localhost:7001");
        return new InitialContext(h);

    } catch(NamingException ne) {
        System.out.println("We were unable to get a connection to the WebLogic server at " + "iiop://localhost:7001");
        System.out.println("Please make sure that the server is running.");
        throw ne;
    }
}

I'm however getting Cast Exception:

Exception in thread "main" java.lang.ClassCastException
    at com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(Unknown Source)
    at javax.rmi.PortableRemoteObject.narrow(Unknown Source)
    at vrd.narrow(vrd.java:67)
    at vrd.lookupHome(vrd.java:80)
    at vrd.main(vrd.java:34)
Caused by: java.lang.ClassCastException: weblogic.corba.j2ee.naming.ContextImpl
    ... 5 more

Am I correct when I'm using the above code to retrive a certain class to be used in my client application? How could I get rid of the cast exception?

Answer 1

I was using the wrong JNDI name, hence it couldn't retrieve the object. Thanks everyone for looking.