SingletonBean.java

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package com.acme;

import javax.naming.InitialContext;
import javax.naming.NamingException;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;

import javax.ejb.Singleton;
import javax.ejb.Startup;
import javax.ejb.EJBException;
import javax.ejb.EJB;
import javax.ejb.LocalBean;

import javax.ejb.SessionContext;

@Singleton
@LocalBean
public class SingletonBean implements java.util.Observer {
  

    @EJB private  SingletonBean me;

    @EJB private  StatefulBean sf;

    @Resource private SessionContext sessionCtx;

    private SingletonBean sb2;
    private SingletonBean sb3;
    private SingletonBean sb4;
    private SingletonBean sb5;
    private StatelessBean slsb;
    private StatelessBean slsb2;
    private StatelessBean slsb3;
    private StatelessBean slsb4;
    private StatelessBean slsb5;
	
    public void update(java.util.Observable a,java.lang.Object b)  {}

    @PostConstruct
    private void init() {

	System.out.println("In SingletonBean:init() me = " + me);
	
	if( sessionCtx.getContextData() == null ) {
	    throw new EJBException("null context data");
	}

	try {
	    InitialContext ic = new InitialContext();

	    // Lookup simple form of portable JNDI name 
	    StatelessBean stateless = (StatelessBean) 
		ic.lookup("java:module/StatelessBean");

	    stateless.hello();

	    // Lookup fully-qualified form of portable JNDI name
	    StatelessBean stateless2 = (StatelessBean) 
		ic.lookup("java:module/StatelessBean!com.acme.StatelessBean");

	    stateless2.hello();

	    sb2 = (SingletonBean) ic.lookup("java:module/SingletonBean");
	    sb3 = (SingletonBean) ic.lookup("java:module/SingletonBean!com.acme.SingletonBean");

	    sb4 = (SingletonBean) ic.lookup("java:module/ES1");
	    sb5 = (SingletonBean) ic.lookup("java:module/env/ES2");

	    slsb = (StatelessBean) ic.lookup("java:module/StatelessBean");
	    slsb2 = (StatelessBean) ic.lookup("java:app/ejb-ejb31-ejblite-javamodule-web/StatelessBean");
	    slsb3 = (StatelessBean) ic.lookup("java:app/ejb-ejb31-ejblite-javamodule-web/StatelessBean!com.acme.StatelessBean");

	    slsb4 = (StatelessBean) ic.lookup("java:app/EL1");
	    slsb5 = (StatelessBean) ic.lookup("java:app/env/EL2");

	    System.out.println("My AppName = " + 
			       ic.lookup("java:app/AppName"));

	    System.out.println("My ModuleName = " + 
			       ic.lookup("java:module/ModuleName"));

	} catch(NamingException ne) {
	    throw new EJBException(ne);
	}
    }

    public void hello() {
	System.out.println("In SingletonBean:hello()");
	if( sessionCtx.getContextData() == null ) {
	    throw new EJBException("null context data");
	}

    }

    @PreDestroy
    private void destroy() {
	System.out.println("In SingletonBean:destroy()");
	if( sessionCtx.getContextData() == null ) {
	    throw new EJBException("null context data");
	}

    }


}