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rxqueue question

Henning G
2011-01-13
2012-08-14
  • Henning G
    Henning G
    2011-01-13

    Hi rexx-people.

    10 years ago I had a problem on my AIX's with rexx if I had several rexx
    running simultaneous.

    The problem was that tne rexx's "snatch" data from each others rxqueue.

    I think we at that time used rexx version 1 or 2.

    Because of this I added following to my rexx's

    ! /usr/bin/rexx

    init_prog:

    / define rexx queue /

    newq = rxqueue('c')

    oldq = rxqueue('s',newq)

    doit:

    / the work to be done /

    'hostname | rxqueue ' newq

    prog_end:

    / del tmp queue /

    rx = rxqueue('s',oldq)

    ry = rxqueue('d',newq)

    I have not been able to recreate the problem using oorexx 3.2 or oorexx 4.1)

    Can anyone tell me it this is still needed ?

     
  • Rick McGuire
    Rick McGuire
    2011-01-13

    It largely depends on how you are invoking the rexx programs. Each rexx
    process will create a private session queue for that process so it is a
    private queue. This also sets an environment variable for the process that
    will be inherited by child processes such as the rxqueue filter so they can
    determine which session queue to use. So, if you have a single top-level rexx
    program that starts a bunch of background processes, then each process will
    inherit the environment variables of the parent process and use the same
    session queue. If you are launching these programs as separate top-level rexx
    programs, then each one will use a different session queue and they will not
    interfere with each other.

     
  • Henning G
    Henning G
    2011-01-14

    Hi

    Thanks, good explanation and this explains the situation :-)

    /Henning