class casting with ejb

[Lucas Smith]

Hi,

I have an EJB client:

public class HelloMain {

	public static void main(String[] args) throws NamingException {
                InitialContext ctx = new InitialContext();
                HelloWorld hw = (HelloWorld) ctx.lookup("ejb/HelloWorldBean");
                String s = hw.sayHello();
                System.out.println(s);
	}
}

HelloWorld is an implementation class of HelloWorldRemote.

I have class cast exception that wrapper cannot be cast on HelloWorld.

When I use:
HelloWorldRemote hw = (HelloWorldRemote) ctx.lookup("ejb/HelloWorldBean");
everything runs flawlessly.

Can someone describe me this situation?

[Roberto Perillo]

Howdy, Lucas.

Well champ, can you show us the code of HelloWorldBean, HelloWorld and HelloWorldRemote? Can you show us the exception's stack trace?

[Ivan Krizsan]

Hi!
Unless the client is a local client to the EJB and uses a no-interface view of the EJB, you cannot use the implementation class when casting the result of the lookup.
In your case, what I can tell is:
1. The client is not a local client of the EJB, since it seems to be executing in another JVM than the EJB.
2. The EJB implements a remote interface. If you haven't explicitly annotated the EJB implementation class with @LocalBean, then there is no local view of the EJB.
Best wishes!