Re: Data Queues - R2M3 example

["James W. Kilgore" <qappdsn@xxxxxxx>]

I dialed into a user I support and grabbed this from a program I wrote a
few years back.  They are at V3R1.

Here are the changes for an indexed data queue:
> 
> 1. Create my data queue:
>         CRTDTAQ DTAQ(mylib/myque) MAXLEN(48) SENDERID(*yes)
                                               ==============
> 
<<snip>>
 
> 4. Have separate program running in background waiting for entries to
> appear on the queue:
>         No F specs, but an I spec to use data structure defined in step 2
        and:
        Data Structure:
        ISNDDTA DS                      44
        I                       9  18 DQJOB     Job (workstation id)
        I                       19 28 DQUSR     User 
        I                       29 34 DQJOBN    Job number
        I                       35 44 DQJOBD    Job description

>         In calcs:
>         *INLR   DOWEQ *OFF
>                 CALL 'QRCVDTAQ'                 Receive Data Queue Entry
>                 PARM 'myque   ' QNAME   10      data queue name
>                 PARM 'mylib   ' QLIB    10      data queue library
>                 PARM            QLEN     50     entry length
>                 PARM            QDATA   48      data in queue
>                 PARM 360        QWAIT    50     wait for an hour (specify # 
>of seconds)
                  PARM            QFIFO    2
                  PARM 8          QKEYL    30
                  PARM *BLANKS    QKEY     8
                  PARM 44         SNDLEN   30
                  PARM            SNDDTA  44
> 
>         QLEN    CASEQ *ZERO     CLNUP           timed out, everyone went home
>                 CAS             RUNIT           something appeared
>                 END
>                 ENDDO
> 
Fields DQJOB, DQUSR let me know who and from which workstation submitted
the entry.  (a timestamp would have been nice, hint..hint..) The
variables QKEYL and QKEY are there because the program I wrote used an
indexed data queue to print the entries in account number order.  I
wrote this a couple of years ago but I recall having problems receiving
the sender data in a straight FIFO sequenced queue.  I do know that you
can set the key value before doing the CALL and think of it as the same
as a SETLL.

I'm freehand typing this so the positions are not correct. best viewed
at fixed pitch font.

TAATOOLS contains commands for retreiving a data queue description and
displaying the contents of a data queue.  Real handy for testing.

Possibly someone else has an example of a FIFO queue with sender
information.


James W. Kilgore
QAPPDSN@ibm.net
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