can you please help me write a healthy working ejb client program for EJB 3.0?


Here is the exception:

javax.ejb.EJBException: Invalid invocation of local interface (null container)

at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:75)

at $Proxy0.calculate(Unknown Source)

at client.CalculatorClient.main(CalculatorClient.java:52)


Here is my program..


/**
*
*/
package client;

import java.util.Hashtable;

import calc.Calculator;
//import calc.CalculatorRemote;

import javax.naming.Context;
import javax.naming.InitialContext;

/**
* @author RArvinda
*
*/
public class CalculatorClient {


public static void main(String[] args) throws Exception
{

Hashtable env = new Hashtable();

env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
env.put(Context.PROVIDER_URL, "localhost:1099"); env.put("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces");
try
{
Context ctx = new InitialContext(env);
trail.slsb.Calculator calculator = (trail.slsb.Calculator) ctx.lookup("EJB3Trail/StatelessCalculator/local");
System.out.println("1 + 1 = " + calculator.calculate(10,10,10.0,10.0));

}catch(Exception e){
e.printStackTrace();
}
}
}