EJB 3.0 Problems

[Mark Spangler]

I'm trying to create this simple EJB 3.0 test and I keep getting a java.lang.ClassCastException when I do the InitialContext lookup. I'm using Java 1.5 with JBoss 4.0.4RC1.

The error I get is:

java.lang.ClassCastException: org.jnp.interfaces.NamingContext
at com.fp.test.v1.client.TestClient.go(TestClient.java:34)
at com.fp.test.v1.client.TestClient.main(TestClient.java:21)

My Client Class:

public class TestClient {
    public static void main(String[] args) {
        try {
    new TestClient().go();
} catch (Exception ex) {
    ex.printStackTrace();
}
    }
    private void go() throws Exception {
        Properties env = new Properties();
env.setProperty( "java.naming.factory.initial",    
                         "org.jnp.interfaces.NamingContextFactory" );
env.setProperty( "java.naming.provider.url",
                         "jnp://localhost:1099" );
env.setProperty( "java.naming.factory.url.pkgs", 
                         "org.jboss.naming :-o	 rg.jnp.interfaces" );
InitialContext ctx = new InitialContext(env);
 
TestRemote tr = (TestRemote) ctx.lookup("MyBean");
String s = tr.getEchoString("Hello World");
System.out.println(s);
    }
}

My Remote Class:

@Remote
public interface TestRemote {
    public String getEchoString(String clientString);
}

My Bean Class:

@Stateless(name="MyBean")
public class TestBean implements TestRemote {
    public String getEchoString(String clientString) {
        return clientString + " - from session bean";
    }
}

[Mike Henry]

As Your client is remote cyou will need to narrow the
result here

...
 
TestRemote tr = (TestRemote) ctx.lookup("MyBean");
...

Try instead

TestRemote tr =     (TestRemote)javax.rmi.narrow(ctx.lookup("MyBean"),TestRemote.class);

It might be helpful..


Mike H

[Mike Henry]

oops

Typing way too fast for my own (or your )good

It should say ...

TestRemote tr =     (TestRemote)javax.rmi.PortableRemoteObject. narrow(ctx.lookup("MyBean"),TestRemote.class);
 

Sorry..
Mike H

[Mark Spritzler]

Mike,

Mark is using EJB 3.0

There is no narrowing in EJB 3.0.

Mark

[Mark Spritzler]

Just out of curiosity.

Try removing the "(name="MyBean")" and let it bind to JNDI with the class name instead of naming it.

Then look it up with

(TestRemote)ctx.lookup("TestBean");

Mark