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| Segmented messages on z/OS |
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| bpugh |
 Posted: Mon Oct 04, 2004 6:51 am Post subject: Segmented messages on z/OS |
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Novice
Joined: 27 Apr 2004
Posts: 24
Location: St. Louis, MO
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I am using COBOL to write segmented messages to a queue on z/OS. My program uses the following flags:
IF LAST-IN-GROUP = 'Y'
COMPUTE MQMD-MSGFLAGS = MQMF-LAST-SEGMENT
ELSE
COMPUTE MQMD-MSGFLAGS = MQMF-SEGMENT
END-IF.
MOVE MQFMT-STRING TO MQMD-FORMAT.
COMPUTE MQPMO-OPTIONS = MQPMO-SYNCPOINT +
MQPMO-DEFAULT-CONTEXT +
MQPMO-LOGICAL-ORDER +
MQPMO-FAIL-IF-QUIESCING.
The queue has no index type. When someone tries to read the message from the queue, they get error 2394, invalid index type. (The person doing the GET is using MQGMO_COMPLETE_MSG, MQGMO_CONVERT, and MQGMO_SYNCPOINT.) If I change the index type on the queue to 'G' (group id), then when I do a PUT, I get error code 2365, segments not supported. I'm stuck in a Catch-22.
I would like to be able to put these segmented messages on the queue and allow a 3rd party to retrieve them using the MQGMO_COMPLETE_MSG option so they could do one GET and let MQ put it back together for them.
I must be missing something really simple. What are the proper flags/settings to use to put/get segmented messages on z/OS?
Thanks in advance! |
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| markt |
| Posted: Mon Oct 04, 2004 7:37 am Post subject: |
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Knight
Joined: 14 May 2002
Posts: 508
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Groups are not the same as segments.
Groups are supported on MQ V5.3 for z/OS.
Segments are not. |
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| bpugh |
| Posted: Mon Oct 04, 2004 7:46 am Post subject: |
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Novice
Joined: 27 Apr 2004
Posts: 24
Location: St. Louis, MO
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| So there is no way to make MQGMO_COMPLETE_MSG work on z/OS? The program getting the message will have to reassemble the pieces manually based on group id and sequence number? |
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| siliconfish |
| Posted: Mon Oct 04, 2004 8:07 am Post subject: |
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Master
Joined: 12 Aug 2002
Posts: 203
Location: USA
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Only SEGMENTATION is not supported on Z/OS, You can still use Message Grouping.
Use MQMF_MSG_IN_GROUP and MQMF_LAST_MSG_IN_GROUP
and remove MQMF_SEGMENT and MQMF_LAST_SEGMENT
_________________
siliconfish |
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| bpugh |
| Posted: Mon Oct 04, 2004 10:21 am Post subject: |
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Novice
Joined: 27 Apr 2004
Posts: 24
Location: St. Louis, MO
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| Ok, thanks. I was doing that originally, but I was trying to make it easier for the receiving program. I was hoping to avoid forcing them to put the messages back together manually. |
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