HelloServlet.java

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package com.acme.servlet;


import java.io.IOException;
import java.io.PrintWriter;

import javax.ejb.EJB;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.acme.ejb.api.Hello;
import com.acme.util.TestDatabase;

@WebServlet(urlPatterns = "/HelloServlet", loadOnStartup = 1)

@SuppressWarnings("serial")
public class HelloServlet extends HttpServlet {
    String msg = "";
    
    @EJB(name = "java:module/m1", beanName = "HelloSingleton", beanInterface = Hello.class)
    Hello h;
    
    @PersistenceUnit(unitName = "pu1")
    @TestDatabase
    private EntityManagerFactory emf;

//    @Inject
//    private ResourcesProducer rp;
//    
//    @Inject
//    private TestDependentBeanInLib fb;
    
//    @Inject
//    private TestManagedBean tmb;
    
//    @Inject
//    private TestSessionScopedBeanInLib tssil;
    
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        System.out.println("In HelloServlet::doGet");
        resp.setContentType("text/html");
        PrintWriter out = resp.getWriter();
        
        checkForNull(emf, "Injection of EMF failed in Servlet");
        //ensure EMF works!
        emf.createEntityManager();
        
        //call Singleton EJB
        String response = h.hello();
        if(!response.equals(Hello.ALL_OK_STRING))
            msg += "Invocation of Hello Singeton EJB failed:msg=" + response;
        
//        if (!rp.isInjectionSuccessful())
//            msg += "Injection of a bean in lib directory into another " +
//            		"Bean in lib directory failed";
//        checkForNull(fb, "Injection of a bean that is placed in lib directory " +
//        		"into a Servlet that is placed in a WAR failed");
//        checkForNull(tmb, "Injection of a Managed bean that is placed in lib directory " +
//        "into a Servlet that is placed in a WAR failed");
//        checkForNull(tssil, "Injection of a session scoped Bean placed in lib dir into a " +
//            "into a servlet in that ear failed");
        
//        if (!rp.isInjectionSuccessful())
//            msg += "Injection of a bean in lib directory into another Bean " +
//            		"in lib directory failed";
        
//        if (!tmb.isInjectionSuccessful())
//            msg += "Injection of a Bean placed in lib dir into a " +
//            		"ManagedBean placed in lib dir failed";
        
        out.println(msg);
    }

    protected void checkForNull(Object o, String errorMessage){
        System.out.println("o=" + o);
        if (o == null) msg += " " + errorMessage;
    }
}