How do I call a remote EJB in an EAR from another?

ejb, ejb-3.0, jakarta-ee, weblogic

Solution

The easiest solution I've found so far is the following.

First, annotate the stateless bean with a `mappedName` attribute:

@Stateless(mappedName="HelloService")
@Remote
public class HelloServiceBean implements HelloService {
  public String hello() {
      return "hello";
  }
}

According to http://forums.oracle.com/forums/thread.jspa?threadID=800314&tstart=1, Weblogic will never create a JNDI entry for an EJB unless a JNDI name is given as the `mappedName` attribute (or in the deployment descriptor, or in a proprietary annotation).

Next, you can now annotate your client field with `@EJB` with a `mappedName` attribute, which should be the same as the attribute on the server bean. (I am honestly baffled by this. NameNotFoundException when calling a EJB in Weblogic 10.3 suggests that I should be able to use the `mappedName#interfaceName` syntax, but in my tests this doesn't work.):

@Stateless
public class HelloClientBean {
    @EJB(mappedName="HelloService")
    HelloService helloService;

// other methods...
}

This now works, as long as both EARs are deployed in the same container. Next I'll try to figure out the right syntax when they are deployed on different machines.

Problem

In Weblogic 10.3, how do I inject a remote EJB from one EAR into a Stateless bean of another, both EARs being deployed in the same container? Ideally I'd like to do as much as possible with annotations. So suppose I have the following interface: ``` public interface HelloService { public String hello(); } ``` implemented by the following EJB: ``` @Stateless @Remote public class HelloServiceBean implements HelloService { public String hello() { return "hello"; } } ``` Suppose they're packaged and deployed in `server.ear`. Now in `client.ear`, I have the following: ``` @Stateless public class HelloClientBean { @EJB HelloService helloService; // other methods... } ``` What do I need to add so that Weblogic figures out the wiring correctly between `HelloClientBean` in `client.ear` and `HelloServiceBean` in `server.ear`? Pointers to official documentations and/or books warmly welcome.

Original source

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