3 Replies Latest reply on Nov 6, 2005 3:58 PM by Alejandro Guizar

    JBPM BPEL get variable instances from processcontext

    Dmitry Newbie

      hi
      i'm developing BAM(http://sourceforge.net/projects/jbam) system for JBPM BPEL.
      i'm intercepting with JBOSS AOP activity execution on enter and leave methods. and i'm trying to get variable instance values from process context, but cant find them there. i would not like to access DB in order to obtain such values. access to DB will badly harm the perforamnce of the system

        • 1. Re: JBPM BPEL get variable instances from processcontext
          Tom Baeyens Master

          imho, i think that using aop is going to have a bigger impact then reading the database. because you are going to read the process variables during the client request. the process variables might not be loaded from the database, so accessing them will load them from the db.

          why not join forces ? i believe that your efforts can be a very valuable contribution to jbpm. i don't think that developing a generic bam solution that plugs into every workflow engine is realistic. workflow and BPM engines do not (yet) have a common foundation. differences are too big so you can't provide much usefull functionalities on that.

          from the few images i could find on your website, it seems that you know what you are talking about. i am interested to invest my time in evaluating, stimulating your ideas and giving you cvs access once we find some degree of concensus.

          i sinserely believe that trying to build a generic bam engine will get stuck in technical issues bridging the gap between all the engines. joining forces will get your work distributed approx 10000 times per month and you can develop much more usefull features.

          interested ?

          regards, tom.

          • 2. Re: JBPM BPEL get variable instances from processcontext
            Dmitry Newbie

            hi Tom,
            it could beginning of very interesting and valuable cooperation. i think we should arrange a voice meeting between our team and you. right now we are writing the design documents and soon they will be posted on our project site.
            please contact me via email, so we could arrange our meeting.
            regards,
            Dmitry.

            • 3. Re: JBPM BPEL get variable instances from processcontext
              Alejandro Guizar Master

              Interesting. I'm looking forward to seeing great things coming out of this cooperation.

              Regarding the original issue, variables are loaded on demand from the database, as Tom explains. Our implementation of the receive activity depends on persistence. There is no way to run completely in memory unless you don't receive at all.