[jboss-user] [Clustering/JBoss] - Re: Loadbalancing and clustering JBOSS using Apache Http ser

Tue Mar 11 11:16:53 EDT 2008

Hello,

I am running the simple ejb3 clustering example.

Where in I have a jsp that calls the bean.This call is in a for loop with time lag in it.
The bean return the String message that is printed by the jsp on the console.

I am attaching the code for HelloWorldBean.java

  | package com;
  | 
  | import javax.annotation.PostConstruct;
  | import javax.annotation.PreDestroy;
  | import javax.ejb.Local;
  | import javax.ejb.PostActivate;
  | import javax.ejb.PrePassivate;
  | import javax.ejb.Remote;
  | import javax.ejb.Stateful;
  | import javax.ejb.Stateless;
  | 
  | import org.jboss.annotation.ejb.Clustered;
  | import org.jboss.annotation.ejb.LocalBinding;
  | import org.jboss.annotation.ejb.RemoteBinding;
  | 
  | 
  | @Stateless
  | @Remote(HelloWorldInterface.class)
  | @RemoteBinding(jndiBinding="ejb/local/HelloWorldBean")
  | @Clustered
  | public class HelloWorldBean {
  | 
  | 	public String getMessage(){
  | 	for(int k=0;k<10;k++) {
  | 		Object a = new Object();
  | 		System.out.println("YUGANT Bean:"+k);
  | 		try {
  | 			Thread.sleep(500);
  | 		} catch (InterruptedException e) {
  | 			// TODO Auto-generated catch block
  | 			e.printStackTrace();
  | 		}
  | 	}
  | 		return "Say Hello";
  | 	}
  | 	@PreDestroy
  | 	public void preDestroy(){
  | 		System.out.println("HelloWorldBean:preDestroy:");
  | 	}
  | 	@PostActivate
  | 	public void postActivate(){
  | 		System.out.println("HelloWorldBean:postActivate:");
  | 	}
  | 	@PrePassivate
  | 	public void prePassivate(){
  | 		System.out.println("HelloWorldBean:prePassivate:");
  | 	}
  |     @PostConstruct
  |     public void postConstruct(){
  |     	System.out.println("HelloWorldBean:PostConstruct:");
  |     }
  | }
  | 
  | 
  | 
The code for Business interface class is 

  | package com;
  | 
  | public interface HelloWorldInterface {
  | 	public String getMessage();
  | }
  | 

The jsp code is :

  | 
  | <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
  |     pageEncoding="ISO-8859-1"%>
  | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  | <%@page import="java.util.Properties"%>
  | <%@page import="javax.naming.Context"%>
  | <%@page import="javax.naming.InitialContext"%>
  | <%@page import="com.HelloWorldInterface"%>
  | <html>
  | <head>
  | <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
  | <title>Insert title here</title>
  | </head>
  | <body>
  | <%
  | 
  | Context ctx = new InitialContext();
  |  HelloWorldInterface fcs = (HelloWorldInterface)ctx.lookup("ejb/local/HelloWorldBean");
  | int k = 0;
  | while(k<10) {
  | 	System.out.println(fcs.getMessage()+":"+k);
  | 	Thread.sleep(500);
  | 	k++;
  | }
  | %>
  | 

Thanks,
Yugant Shah.

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