5 Replies Latest reply on Apr 8, 2002 4:26 PM by Marcus Brito

    What version of JBoss supports Local interfaces?

    neil blue Newbie

      Hello,

      I have seen a few posting about local interfaces in JBoss, but no clear statment about which version of JBoss supports it. Please could anyone help me here.

      Thank you

      Neil Blue

        • 1. Re: What version of JBoss supports Local interfaces?
          Craig Day Newbie

          i believe there is no version at this point. the jboss developers i have spoken to about Local interfaces dont think they are such a crash hot idea, and i tend to agree, so its probably low priority. i think that spec compliance is not usually a focus of jboss development, more something that just happens as a bi-product. this is not a dig, i think a stable, fast, hi-tech, configurable, extendable container is better than something that implements every single nuance of the spec.

          c

          • 2. Re: What version of JBoss supports Local interfaces?
            Adrian Brock Master

            ?

            Local interfaces are largely irrelevant in JBoss.
            Unless your turn the optimization off, JBoss will use
            local invocation even when you try to do remote invocation inside the same VM.
            Sometimes, I think this was one of the major reasons why
            JBoss was written in the first place. Just for this
            optimization.

            Sepcifically on spec compliance, there are bugs in
            in 2.4.4 with local invocation from the Web container
            some of which (maybe all) will be fixed by 2.4.5
            They are already fixed in 3.0

            There is still an outstanding issue in both 2.4 and
            3.0 with relative <ejb-link>s that I'm hoping to fix
            before 3.0 goes final. But this isn't really a problem
            with local interfaces, more with ejb-refs in general.

            Regards,
            Adrian

            • 3. Re: What version of JBoss supports Local interfaces?
              Luke Taylor Novice


              > Local interfaces are largely irrelevant in JBoss.

              They're pretty important for CMP. CMR fields have to be local interfaces.

              Luke.

              • 4. Re: What version of JBoss supports Local interfaces?
                Chris Harris Newbie

                Local interfaces also have explicit pass-by-reference semantics. Optimized remote calls in JBoss use pass-by-reference but shouldn't - this can get you into trouble if you've got less experienced programmers who find they are able to use 'in/out' parameters in their remote calls!

                (I'm not saying they *should*, simply that I *have* seen it happen. It made me shudder.)

                c

                • 5. Re: What version of JBoss supports Local interfaces?
                  Marcus Brito Novice

                  Anyway, here is the answer:

                  JBoss supports local interfaces since 2.4.something (2, if I remember wel). In 2.4.x series, you can define local interfaces but you can't look them up in the global namespace -- you need an ejb-link to look them up. However, this is enough for most needs -- and is enough to plug in a complete CMP2 engine like MVCSoft Persistence Manager[1].

                  Starting from 3.0.x, JBoss fully supports local interfaces and you can even define JNDI names for local interfaces. Also, JBoss 3.0.x has it's own CMP2 Persistence Manager.

                  [1] http://www.mvcsoft.com