Hello world ejb3 problem

please help,

index.jsp

am getting

java.lang.NullPointerException
servlets.testSer.doGet(testSer.java:71)
javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

my project name in netbeans are
ejbPro is ear file
ejbPro-ejb Executable jar file
ejbPro-war

java.lang.NullPointerException
servlets.testSer.doGet(testSer.java:71)

You haven't posted your servlets.testSer servlet code.

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package servlets;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import stateless.localStatelessLocal;
import javax.ejb.EJB;

/**
 *
 * @author shabarish
 */
public class testSer extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @EJB
    private static localStatelessLocal local;

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        
        try {
            
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet testSer</title>");  
            out.println("</head>");
            out.println("<body>");
           
            out.println("</body>");
            out.println("</html>");
            
        } finally { 
            out.close();
        }
    }

// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    
 
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
    PrintWriter out = response.getWriter();
    out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet testSer</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<H1>"+local.getMessage()+"</H1>");
            out.println("</body>");
            out.println("</html>");
        //processRequest(request, response);
    }

/** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

/** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}

please help

So your EJB seems not to be injected. To which container are you trying to deploy your app?

am using Jboss 4.5 GA what excatly should be done to make this small program work

There's no JBoss AS 4.5 GA. Anyway, the 4.x version of JBoss AS did not have complete support for EJB3, especially for injection of beans in servlets. So you might want to try JBoss AS 5.1.0 version.

Reading the EJB 3 specifications sometimes helps!

Change your container like the above post says!

Your Stateless SB is still as per EJB 2.1 spec. To get this to work, you will have to inject the Home interface of the EJB into the servlet code and then access the local/remote interface of the bean that way.

oh! how is it ejb2.1? !!!

can you please see the below link hello world ejb3
i refered the above link i have done the same thing as he has done, can you correct me if am wrong?

Arun Rao wrote:Your Stateless SB is still as per EJB 2.1 spec. To get this to work, you will have to inject the Home interface of the EJB into the servlet code and then access the local/remote interface of the bean that way.

Are you aware of how a Session bean is declared as per EJB 2.1 specification?

no sir, i dont know about ejb2.1.

please tell me what to do and how to proceed

Jaikiran

Please provide more information about the deployment process.

Regards,
Mihai

Mihai Radulescu wrote:Jaikiran

Please provide more information about the deployment process.

You mean, the process to deploy EJB3 applications on JBoss AS-5? These are the EJB3 tutorials for JBoss AS-5. Let us know, if you are looking for something else.

shabarish vai wrote: please tell me what to do and how to proceed

Please read my earlier reply about using JBoss AS-5. Your first step, should be to download JBoss AS 5.1.0.

Arun Rao wrote:Your Stateless SB is still as per EJB 2.1 spec

Actually, that's not true. The code that shabarish posted is EJB3.0.

Sorry my bad.. I dont know what i was smoking.. It is EJB 3.

hi Jaikiran
am not not able to confugure netbeans with jboss 5,
it says please provide vlid jnoss server 4 or 5

shabarish vai wrote:
am not not able to confugure netbeans with jboss 5,
it says please provide vlid jnoss server 4 or 5

I'm sorry, i don't use any IDEs for integrating with JBoss AS. So i won't be able to help much on that part. Someone else who knows better might help.

i found there is bug in netbeans and some people have reported ,this is what i read from some forums, can you please tell me how to run this program?

@ shabarish
Try using NetBeans IDE 6.8

Hi,

I just run the code on GlassFish v3 using NetBeans 6.8
I had to remove "static" modifier from " private static localStatelessLocal local;"

With the "static" modifier I got an error:

HTTP Status 500 -

type Exception report

message

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: PWC1392: Error instantiating servlet class servlets.testSer

root cause

com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class servlets.testSer

root cause

com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Local ejb-ref name=servlets.testSer/local,Local 3.x interface =stateless.localStatelessLocal resolved to intra-app EJB localStatelessBean in module TestEJB-war,ejb-link=localStatelessBean,lookup=null,mappedName=,jndi-name=,refType=Session into class servlets.testSer

root cause

com.sun.enterprise.container.common.spi.util.InjectionException: Illegal use of static field private static stateless.localStatelessLocal servlets.testSer.local on class that only supports instance-based injection

note The full stack traces of the exception and its root causes are available in the GlassFish v3 logs.
GlassFish v3

Regards,