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| ajayvizag |
 Posted: Thu Aug 27, 2009 12:54 am Post subject: Using Message Exits |
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Apprentice
Joined: 20 Feb 2009
Posts: 31
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Hi All,
Currently in our project we have a set up where in whnever a application puts a message in a queue a trigger monitor invokes an application which takes the message. The application which puts the message in the queue is not accessivble to us but we still want to keep an audit information of the message that was put by the application so without disturbing that application that is making changes to it to log a copy in some other queue.... we are thinking of implementing a message exit which would help us start a applicatiob which will record all the messages that are placed in that queue. I would like to know how can a exit help me and where can i get the required information.
Thanks & Regards
Ajay |
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| WMBDEV1 |
| Posted: Thu Aug 27, 2009 1:30 am Post subject: |
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Sentinel
Joined: 05 Mar 2009
Posts: 888
Location: UK
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I'd try and avoid exits where possible but if you insist.... You may be able to look at the mirrorq sample for guidance (note this is not production code but may help you moving forwards).
Also depending on your version of MQ it seems you can use pub / sub for such a requirement if you're on the latest version and i've no experience of this. |
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| ajayvizag |
| Posted: Thu Aug 27, 2009 3:13 am Post subject: |
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Apprentice
Joined: 20 Feb 2009
Posts: 31
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| Thanks for the suggesrtion forgot to mention that the application is written in java is there any java program that does the job of mirrorq. |
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| Vitor |
| Posted: Thu Aug 27, 2009 4:50 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| ajayvizag wrote: |
| is there any java program that does the job of mirrorq. |
Message exits can't be written in Java.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| ajayvizag |
| Posted: Thu Aug 27, 2009 5:31 am Post subject: |
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Apprentice
Joined: 20 Feb 2009
Posts: 31
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| Did u mean that none of the exits can be written in java. If so what are the supported languages. |
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| Vitor |
| Posted: Thu Aug 27, 2009 5:39 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| ajayvizag wrote: |
| Did u mean that none of the exits can be written in java. If so what are the supported languages. |
User exits are written in C because they run as part of the queue manager (simplistically). This is what makes a poorly written one so dangerous.
_________________
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Insanity is the best defence. |
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| Vitor |
| Posted: Thu Aug 27, 2009 5:41 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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Moving back to your original question, I'd search this forum for some of the discussions around auditing and message copy. It's not the first time this has come up and you may find some of the discussions helpful.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| ajayvizag |
| Posted: Thu Aug 27, 2009 9:23 pm Post subject: |
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Apprentice
Joined: 20 Feb 2009
Posts: 31
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| I tried using the mirrorq utility and it actually address my requirement. I was able to see it successfully place the message in one more queue in windows but the AIX installable is not working fine. It gives the following error "AMQ7214:The module for API Exit 'mirrorq' could not be loaded" |
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| ajayvizag |
| Posted: Thu Aug 27, 2009 11:10 pm Post subject: |
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Apprentice
Joined: 20 Feb 2009
Posts: 31
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| I checked the error log and it said the mirror_r is a 32 bit library and a 64 bit library is required any help? |
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| WMBDEV1 |
| Posted: Fri Aug 28, 2009 12:00 am Post subject: |
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Sentinel
Joined: 05 Mar 2009
Posts: 888
Location: UK
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| ajayvizag wrote: |
| I checked the error log and it said the mirror_r is a 32 bit library and a 64 bit library is required any help? |
Recompile with 64 bit libraries? |
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| ajayvizag |
| Posted: Fri Aug 28, 2009 2:44 am Post subject: |
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Apprentice
Joined: 20 Feb 2009
Posts: 31
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I am getting the below error when i am trying to restart my QM after configuring the exit in UNix....
"failed to load as it is probably a 32-bit library,
a 64-bit library is required. The following message gives details of the
original failure."
"The system could not dynamically load the shared library
'/var/mqm/exits64/mirrorq_r'. The system returned error message
''/var/mqm/exits64/mirrorq_r' is not a valid load module: Bad magic number'.'
"The module for API Exit 'mirrorq_test' could not be loaded.
EXPLANATION:
The module '/var/mqm/exits64/mirrorq_r' for API Exit 'mirrorq_test' could not
be loaded for reason xecU_S_LOAD_FAILED.
ACTION:
Correct the problem with the API Exit module 'mirrorq_test" |
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| Mr Butcher |
| Posted: Fri Aug 28, 2009 4:26 am Post subject: |
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Padawan
Joined: 23 May 2005
Posts: 1716
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please show us how you compiled the exit
please show us how you specified the exit in the qmgr
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Regards, Butcher |
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| Vitor |
| Posted: Fri Aug 28, 2009 7:07 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| ajayvizag wrote: |
| I tried using the mirrorq utility and it actually address my requirement. I was able to see it successfully place the message in one more queue in windows but the AIX installable is not working fine. It gives the following error "AMQ7214:The module for API Exit 'mirrorq' could not be loaded" |
Let's be quite clear here, not just for you but for future readers of this post - mirrorq is not a utility it's a sample only. It's not supported like the other IBM WMQ utilities and the sample code is not considered to be production strength even when it works.
So even on Windows (where the supplied sample works) if it causes any issues in your environment then it'll be on you to resolve them. This is particually important as you need to change & recompile it for the 64-bit AIX environment - this makes it your code and your problem.
Obviously you can get help from this forum. Be sure to mention to your site management that this component of your environment is being supported not by IBM but a bunch of part-time strangers on the net.
Also be aware that exits can affect queue manager performance badly, to the point a badly compiled or linked exit can crash a queue manager. This is important if maintenance is applied to the underlying OS, which might require changes and/or relinking of an exit.
User exits are considered an advanced WMQ topic, and should not be taken lightly.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| Cressida |
| Posted: Sun Aug 30, 2009 12:45 am Post subject: |
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Disciple
Joined: 13 Jul 2007
Posts: 157
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We think that API Exits are not voodoo, nor taboo, nor ....
And since this mirrorq thing still keeps coming up : Have a look at
SynQuest It is a professionally developed, no user C or API Exit coding required, multi-platforms supported, performance optimized and efficient, vendor provided and supported mirrorq like functionality.
And while still available, register to download the special package done for developerWorks and MQSeries.net community found here Special Package |
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| ajayvizag |
| Posted: Mon Aug 31, 2009 6:33 am Post subject: |
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Apprentice
Joined: 20 Feb 2009
Posts: 31
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Thaank u all for the help that u guys have provided i was able to compile the mirrorq in 64 bit but now my runmqsc command is not working.
The following error message is display on the console "AMQ9508: Program cannot connect to the queue manager." |
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