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| How to find Queue depth using C |
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| jarun111 |
 Posted: Wed Jun 08, 2005 6:15 am Post subject: How to find Queue depth using C |
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Acolyte
Joined: 19 Apr 2004
Posts: 70
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Hi,
How do I find the queue depth of a queue making use of C API. I am aware of the queue depth variable in C library, but it returns me a negative number instead of original depth. Any thought would be very helpful.
Thanks
Arun |
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| jefflowrey |
| Posted: Wed Jun 08, 2005 6:17 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Usually, the only programs that should know the queue depth are monitoring programs. Applications should read the queue until it's empty, or put messages until they get an error that says the queue is full and then *stop*.
But you can use the MQINQ verb to get the queue depth.
You can also create a PCF message and get back a response message that tells you the depth of a queue.
You can not get the depth of any queue that is not a QLOCAL.
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I am *not* the model of the modern major general. |
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| jarun111 |
| Posted: Wed Jun 08, 2005 6:32 am Post subject: |
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Acolyte
Joined: 19 Apr 2004
Posts: 70
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Thanks Jeff.
Sorry I am using C++.When I use ImqQueue.current depth it returns me a negative number. Any thoughts? Do I need to start any service on the Queue manager side? |
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| jefflowrey |
| Posted: Wed Jun 08, 2005 6:49 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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I don't know what ImqQueue does - whether it does an MQINQ or a PCF.
I'd guess that a negative number indicates an error, though.
I don't remember my C++ MQ API very well. Have you tried putting the call in a try/catch to see if it throws an error as well as returning a bad value?
If ImqQueue.current depth uses PCF, then you probably don't have a command server running on the qmgr.
If it uses MQINQ, then either you are trying to inq on a queue that is not a qlocal, or you do not have inq permissions on the queue.
But again, and I really can't stress this enough, if you are not writing a monitoring application, you should not write your code to care about qdepth.
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I am *not* the model of the modern major general. |
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