ClassCastException for Stateful Bean in JBoss

[hashmukh punamia]

Hi Reza and other Ranchers,

I am facing some issue in Stateful Session Bean in JBoss.

This is my SessionBean code

 
package com.waveset.ejb;

import javax.ejb.Stateless;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.ejb.Remove;
import javax.ejb.Stateful;
import javax.ejb.PostActivate;
import javax.ejb.PrePassivate;


@Stateful(name="SampleStatefulEJBA")
public class SampleStatefulEJB1Bean implements SampleStatefulEJB1Remote {
    
    // Add business logic below. (Right-click in editor and choose
    // "EJB Methods > Add Business Method" or "Web Service > Add Operation")
    
    public String method1()
    {
        return "Success";
    }
    
    @PostActivate
    @PostConstruct
    public void methodA()
    {
        System.out.println("PostConstruct");
    }
    
    @PrePassivate
    @PreDestroy
    public void methodB()
    {
        System.out.println("PreDestroy");
    }
    
    @Remove
    public void methodC()
    {
        System.out.println("Remove");
    }    
    
    
}

The following Code in my client calls the bean

  
<%
                Properties env = new Properties();
                env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
                env.put(Context.PROVIDER_URL, "jnp://localhost:1099");
                env.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");                 
                
                InitialContext ic = new InitialContext(env);
                SampleStatefulEJB1Remote sampleStatefulEJB1Remote = (SampleStatefulEJB1Remote)ic.lookup      ("SampleStatefulEJBA/remote");
                             

                out.println("<h1>Success " + sampleStatelessEJB1Remote.method1() + "</h1>");


%>
 

I get the following error.
java.lang.ClassCastException: $Proxy169

I also checked the classpath and everything and they seems to be fine.
Also if I change the @Stateful to @Stateless, it works fine

Is this the issue with the JBoss4.2.2GA version.

Your Help would be appreciated.

Thanks in advance.

Regerds,
Hash

[Amandeep Singh]

try to change your Bean code to like this-

@Stateful(name = "SampleStatefulEJBA", mappedName="java:comp/env/SampleStatefulEJBA")

[hashmukh punamia]

HI AmanDeep,

I am still getting the same Error.

java.lang.ClassCastException: $Proxy71

any other solutions for this issue

Thanks,
Hash

[Reza Rahman]

Hash,

This does look like a class-path issue. I would look closely to see if you have multiple copies of any class/interface in the classpath. If so, you'll need to remove them and set module depenencies correctly.

Best regards,
Reza

[Jaikiran Pai]

hashmukh,

As Reza mentioned, check whether you are packaging the bean interfaces in more than one place - one in jar and one in war. If so, then remove it from the war and let it remain in the jar.

Also if I change the @Stateful to @Stateless, it works fine

That's interesting. Which JDK version do you use? And do you use any IDE (like NetBeans) with JBoss? I remember something similar with NetBeans and JBoss with Java 1.6

[hashmukh punamia]

Hi Reza and Pai,

Thanks for your quick reply.

I am using Netbeans6.1RC2 to create a independant EJB module with the stateless bean code as shown in the above message. My EJB module only consists of a sample Bean and a the Bean Interface.
Then I deploy the ejb module in JBoss4.2.2GA.

Now I create a seperate web application project to which I have added this ejb jar file to my project lib.
I am importing the package into my JSP and just doing a lookup for the same.

But I am getting java.lang.ClassCastException: $Proxy108

Thanks in advance

Thanks,
Hash

[Reza Rahman]

Hash,

You cannot copy the ejb-jar file directly. You must properly reference it as a Java EE module via manifest class path dependency. Again, feel free to take a look at our JBoss code examples.

Best regards,
Reza

[hashmukh punamia]

Hi Reza, JaiKiran and AmanDeep,

Finally Its is working.

Thanks a lot.

Thanks & Regards,
Hash