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| HeadOffice |
 Posted: Thu Apr 10, 2008 9:45 am Post subject: Peek & Count???????? |
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Newbie
Joined: 13 Mar 2008
Posts: 9
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I'm relatively new to MQ but have built a client able to connect, write to, read from and disconnect MQ queues. This has been done in C#.NET.
My 2 questions are:
1. Can I "peek" at a message without removing it from a queue - and how?
2. Can I determine how many messages are on the queue - and how?
Using the amqmdnet dll I'm hoping the right flags/methods are exposed. Any ideas?
Many thanks in advance... |
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| jefflowrey |
| Posted: Thu Apr 10, 2008 9:55 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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1) Yes. It's called "browse".
2) Yes, BUT. yes, you can do this. You never want to code a business application to use this, though. The only thing that has any business thinking about the queue depth is a monitoring/status application.
Read the queue until it's empty - you get back MQRC_NO_MSG_AVAILABLE.
You almost certainly don't want to browse the queue either. You likely want to use syncpoint.
_________________
I am *not* the model of the modern major general. |
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| HeadOffice |
| Posted: Thu Apr 10, 2008 10:01 am Post subject: Re: Peek & Count |
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Newbie
Joined: 13 Mar 2008
Posts: 9
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I can't see "Browse" exposed as a method on the queue or queue manager classes. Any ideas where?
As for Counting - I'd just like to monitor how many messages on the queue.
Thanks for the advice - if you can point me in the direction of the browse I'd be eternally grateful.
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| jefflowrey |
| Posted: Thu Apr 10, 2008 10:31 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| PeterPotkay |
| Posted: Thu Apr 10, 2008 12:01 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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I know this will sound weird, but the # of messages that you can get can quite often be less than the q depth reports. Its an odd concept for new MQ people, but its been discussed a bunch of times here. Do a quick search for more info.
_________________
Peter Potkay
Keep Calm and MQ On |
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| bruce2359 |
| Posted: Thu Apr 10, 2008 1:53 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9471
Location: US: west coast, almost. Otherwise, enroute.
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A translation: current depth is the total number of messages in the queue. If some (or all) are not yet comitted, your app will not be able to mqget them.
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ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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