Servlet receives null from Remote EJB3 Session Bean
- by Hank
I'm sure this is a beginner error...
So I have a JEE6 application with entities, facades (implementing the persistence layer) and Stateless Session Beans (EJB3) with Remote interfaces (providing access to the entities via facades).
This is working fine. Via the SLSB I can retrieve and manipulate entities.
Now, I'm trying to do this from a Web Application (deployed on the same Glassfish, entity+interface definitions from JEE app imported as separate jar). I have a Servlet, that receives an instance of the SLSB injected. I get it to retrieve an entity, and the following happens (I can see it in the logs):
the remote SLSB gets instantiated, its method called
SLSB instantiates the facade, calls the 'get' method
facade retrieves object from DB, returns it
SLSB returns the object to the caller
(all is good until here)
calling servlet receives .. null !!
What is going wrong? This should work, right?
MyServlet:
public class MyServlet extends HttpServlet {
@EJB
private CampaignControllerRemote campaignController; // remote SLSB
protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/plain");
PrintWriter out = response.getWriter();
try {
Campaign c = campaignController.getCampaign(5L); // id of an existing campaign
out.println("Got "+ c.getId()); // c is null !!
} finally {
out.close();
}
}
...
}
Pls let me know if you want to see other code, and I'll update the post.
