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| MQSERIES MIRROR EXIT on Z/OS |
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| dlperea |
 Posted: Mon Jun 29, 2009 12:10 am Post subject: MQSERIES MIRROR EXIT on Z/OS |
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Newbie
Joined: 10 Jan 2008
Posts: 3
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Hi everybody,
I need to copy messages from a queue to another before they expire.
Scenario: I have a queue defined (Z/OS environment) with 'EXPIRATION PERIOD' specified. I need to copy the expired messages to a queue/file or wherever, before those messages expire.
I found some topics related to a mirror exit (but only on other environments) but not in Z/OS MQ.
Thanks a lot in advanced, any 'hint' will be really appreciated...
Best Regards.
David L |
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| exerk |
| Posted: Mon Jun 29, 2009 12:17 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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Look in the panels (I can't remember which one, and I'm not logged into a z/OS queue manager presently) but there is a facility within z/OS to copy messages from one queue to another, however, I think it will also 'copy' the expiry, so may not be of use to you.
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| Mr Butcher |
| Posted: Mon Jun 29, 2009 12:25 am Post subject: |
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Padawan
Joined: 23 May 2005
Posts: 1716
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No. The MQ supplied panels (csqorexx stuff) allow you to move messages from one queue to another, but it does not allow you to copy messages.
mirrorq is an api exit, that one does not exist for z/OS (Batch).
you could use csqutil load and save options to copy messages in batch, but this will also copy the MQMD header, so the reloaded messages will expire.
it also depends, whether this is a one time action or something, that should run regulary or automatically. for one time action check utilities like "Q" program (MA01), here you can copy messages and you have the possibility to create an own MQMD so messages will not expire. For automatic solution, you must write your own program that is maybe triggered. for messages that come in via channel, you could write a message exit to store a copy of the message.
however, if someone needs to catch expired messages before they expired, then this smells like a bad application design. maybe you should start at that point, and not running for utilities.
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Regards, Butcher |
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| exerk |
| Posted: Mon Jun 29, 2009 12:35 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| Mr Butcher wrote: |
| No. The MQ supplied panels (csqorexx stuff) allow you to move messages from one queue to another, but it does not allow you to copy messages... |
Thank you for the correction...me shooting from the lip again 
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It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
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| Vitor |
| Posted: Mon Jun 29, 2009 2:57 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Mr Butcher wrote: |
| mirrorq is an api exit, that one does not exist for z/OS (Batch). |
| Mr Butcher wrote: |
| however, if someone needs to catch expired messages before they expired, then this smells like a bad application design. |
If these messages are so important you need to keep a copy, why are they set to expire?
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Honesty is the best policy.
Insanity is the best defence. |
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| gbaddeley |
| Posted: Mon Jun 29, 2009 5:27 pm Post subject: Re: MQSERIES MIRROR EXIT on Z/OS |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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| dlperea wrote: |
Hi everybody, ...
Scenario: I have a queue defined (Z/OS environment) with 'EXPIRATION PERIOD' specified. |
What queue attribute are you referring to? Expiration is a property of individual messages, not queue objects.
| Quote: |
| I need to copy the expired messages to a queue/file or wherever, before those messages expire. |
This smells of a bad MQ messaging design, as already mentioned in this thread.
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Glenn |
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| dlperea |
| Posted: Tue Jun 30, 2009 9:32 am Post subject: |
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Newbie
Joined: 10 Jan 2008
Posts: 3
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Thanks for your answers....
As you said, is a VERY bad design, but that is something I cannot change.
The bussiness scenario is really complex, the application development is done by a different company...I'm only working in the System Architecture Area...
Anyway I really appreciate your help.
BR.
David Lázaro.. |
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| bruce2359 |
| Posted: Tue Jun 30, 2009 11:10 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9470
Location: US: west coast, almost. Otherwise, enroute.
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As has been discussed, any application that copies (creates an exact replicate) of a message with expiry set, will result in a message with expiry set.
Note also that expiry is the total time in any queue, not just the queue that the application opened. Total time includes xmit queues, dead-letter queue.
You will need to write an application that copies everything to the new message, but modify expiry so that the message doesn't expire (or expires much later).
If the original messages are set to expire in one or two seconds, the messages may expire before you can MQGET them to copy them.
Again, bad design.
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