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await replies debate

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  • September 20, 2007 at 6:30 pm #49533
    Gary Atkinson
    Participant

      We are having a little debate over “await replies” in outbound threads here at the office.   If you choose a time of lets say 30 seconds and are not using recover_33 procs, what happens after the 30 seconds are up and a reply is still not received?  Also, with not using recover_33 procs and outbound thread sends a message to a sending system, does the engine have any control over that message that was just sent and is awaiting a reply?

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      • September 20, 2007 at 6:40 pm #62346
        John Hamilton
        Participant

          If you are not using the recovery procs.

          If you have await replies turned on if it times out it will go to the next message in the queue to be sent.  

          The message it first sent is gone from your system.  So you will have no control over it.

        • September 20, 2007 at 6:42 pm #62347
          Jim Kosloskey
          Participant

            Gary,

            The first part of your post:

            If you do not have any acknowledgment handling in place (recover_33 procs or some others) and timeout occurs, the engine will send the next message in line.

            The second part:

            Well the message sits in the Recover DB until the time expires and then it is removed and the next message is sent. IF you take control via Tcl and do something with the message you have some control over what happens to it – hence the recover_33 or equivalent procs.

            You did not ask, but if you have await replies on, and no acknowledgment handling procs involved, and you do not do anything to handle the reply via routing for example, you will get a Trx ID error on the reply.

            Well the above is my recollection.

            Since we always use acknowledgement handling, I might be a little rusty as to what happens when you do not. I cannot think of any good reason not to handle acknowledgments properly.

            Jim Kosloskey

            email: jim.kosloskey@jim-kosloskey.com 29+ years Cloverleaf, 59 years IT - old fart.

          • September 20, 2007 at 7:29 pm #62348
            Gary Atkinson
            Participant

              Thank you both for the quick responses.  It would be nice if in the next versions of cloverleaf that recover is built into the engine.

            • September 20, 2007 at 8:14 pm #62349
              Jim Kosloskey
              Participant

                Greg,

                I am not sure but I think that will be in a future release (at least a standard acknowledgment handling for basic stuff like HL/7 – special cases will probably still need Tcl).

                Maybe someone from Quovadx recalls – Rob Abbott??

                Jim Kosloskey

                email: jim.kosloskey@jim-kosloskey.com 29+ years Cloverleaf, 59 years IT - old fart.

              • September 21, 2007 at 11:33 am #62350
                Steve Carter
                Participant

                  Yes.  Basic reply handling will be included in Cloverleaf 5.6.

                  Steve

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