Remote Injection

Question

hello,
I am using Eclipse, Glassfish. I created an enterprise application and added an EJB module to it which contains one Remote EJB as the given code shows:
package mybeans;
import javax.ejb.Remote;
@Remote
public interface ARemote {
     public String foo();
package mybeans;
import javax.ejb.Stateless;
@Stateless (mappedName="ejb/a")
public class A implements ARemote {
    public A() {}
    public String foo(){
         return "hello remote";
}I built the enterprise application and deployed it. Now to test remote injection I created a web application (separate from the enterprise application) and added a servlet that performs injection as follows:
import java.io.IOException;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import mybeans.ARemote;
public class tester extends HttpServlet {
     @EJB (mappedName="ejb/a")
     private ARemote a;
     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          response.getWriter().println(a.foo());
}I added the EJB module (of the enterprise application) to the path of the web application to compile the servlet.
when I run the servlet (of course while the enterprise application is deployed) I get a ClassNotFoundException: mybeans.ARemote.
I tried using <ejb-ref> in the DD of the web application as follows:
<ejb-ref>
       <ejb-ref-name>ejb/a</ejb-ref-name>
       <ejb-ref-type>Session</ejb-ref-type>
       <remote>mybeans.ARemote</remote>
  </ejb-ref>but it is not working.
Please:
How can I get it this simple injection example to work?
Is it Mandatory to use <ejb-ref> and other ref tags? If no then when do I need them?
Do you have a book name or tutorial that explains injection decently?
I read the specifications hoping the the injection delma can be solved but the spec's didn't help much. Most books make injection sound as simple as just put @Resource or @EJB and everything will work just fine, but it seems like there are some entries that must be configured in the DD. Unfortunately I couldn't find a document/tutorial that explains this topic with clear direct and full examples.
Thanks, and I appreciate your help.

Answer 1

Ok I managed to get rid of the NoClassDefFoundError. What I did was I generated a jar file for the ejb module then I copied the jar file to the WEB-INF/lib folder. I feel like coping the JAR to the lib folder is like loading the jar twice, the first when it is part of the EAR the second when it is part of the web application...
Isn't that kind of redundant, or is this the way to do things properly?
Now I am getting a new exception: NameNotFoundException.
I tried what vamsitiru suggested, and I tired it without the # (I mean just the mappedname) and this is what I am getting (in both cases):
javax.naming.NameNotFoundException: mybeans.ARemote#mybeans.ARemote not found
I checked the JNDI Browsing and I can see the bean under subcontext ejb, there are two entries:
ejb/a
ejb/a#mybeans.ARemote <--- I tired this as the name to lookup and again same exception
Any suggestions please?