Stateful Session Bean

Stateful session Bean 2.1 with remote interface. Follow the below steps to invoke the session bean.

Step 1:
Bean 

package com.bhuvan;

import java.rmi.RemoteException;

import javax.ejb.EJBException;
import javax.ejb.SessionContext;

public class HelloBean implements javax.ejb.SessionBean {

 public int val;
 
 public void ejbCreate(int val) throws EJBException, RemoteException {
  this.val=val;  
 } 
 public void ejbActivate() throws EJBException, RemoteException { 
  
 }

 public void ejbPassivate() throws EJBException, RemoteException { 
  
 } 
 public void ejbRemove() throws EJBException, RemoteException {
 
 } 
 public void setSessionContext(SessionContext arg0) throws EJBException,
   RemoteException {
 } 
 public int helloworld()
 {  
  return ++val;
 }
}

Step 2:
Home interface

package com.bhuvan;

public interface HelloHome extends javax.ejb.EJBHome{ 
 HelloRemote create(int val) throws java.rmi.RemoteException;
}

Step 3:
Remote interface

package com.bhuvan;

public interface HelloRemote extends javax.ejb.EJBObject { 
 public int helloworld() throws java.rmi.RemoteException; 
}

Step 4:
ejb-jar.xml

<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar id="ejb-jar_ID" version="2.1" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd">
 <enterprise-beans>
<session>
<ejb-name>HelloWorld</ejb-name>
<home>com.bhuvan.HelloHome</home>
<remote>com.bhuvan.HelloRemote</remote>
<local-home>com.bhuvan.HelloLocalHome</local-home>
<local>com.bhuvan.HelloLocal</local>
<ejb-class>com.bhuvan.HelloBean</ejb-class>
<session-type>Stateful</session-type>
<transaction-type>Container</transaction-type>
</session>
</enterprise-beans>
</ejb-jar>

Step 5:
Application Client

import java.util.Properties;

import javax.naming.InitialContext;
import javax.naming.Context;
import com.bhuvan.HelloHome;
import com.bhuvan.HelloRemote;
import com.bhuvan.HelloLocalHome;
import com.bhuvan.HelloLocal;
import javax.rmi.PortableRemoteObject;

public class ClientApp {

 public static void main(String[] args)throws Exception {
  try{
  Properties properties = new Properties();
  properties.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
  properties.put("java.naming.provider.url","jnp://localhost:1099");
  properties.put("java.naming.factory.url.pkgs","org.jboss.naming.client");

  InitialContext context =new InitialContext(properties);
  HelloHome home = (HelloHome) context.lookup("HelloWorld");
  HelloRemote count[]=new HelloRemote[3];
  
  int countVal=0;
  
  for(int i=0;i<3;i++)
  {
   count[i]= home.create(countVal);
   countVal=count[i].helloworld();
   System.out.println("First :"+countVal);
   Thread.sleep(5000);
  }
  
  for(int i=0;i<3;i++)
  {   
   countVal=count[i].helloworld();
   System.out.println("Second :"+countVal);
   Thread.sleep(5000);
  }
  
  for(int i=0;i<3;i++)
  {
   count[i].remove();    
   Thread.sleep(500);
  }    
 } 
 catch(Exception e)
 {
  e.printStackTrace();
 }
}
}

OUTPUT in client Console:

First : 1
First : 2
First : 3

Second : 2
Second : 3
Second : 4