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| rmalghan |
 Posted: Wed Apr 08, 2009 10:12 am Post subject: Newbie: get a count of number of messages in a que |
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Newbie
Joined: 09 May 2008
Posts: 8
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Hi: I have installed the MQ JAVA API client on a server and have been able to run the sample code (MQSample) to connect to MQ server. This sample script just puts a message in the que and fetches it back. I am trying to build a script that checks the number of messages in a que. I am very new to MQ and this integration. Can someone provide me pointers or sample scripts which might do this?
TIA
Ravi |
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| mqjeff |
| Posted: Wed Apr 08, 2009 10:13 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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Why do you need to know how many messages are on the queue?
Here's a big hint - you almost certainly don't. |
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| rmalghan |
| Posted: Wed Apr 08, 2009 10:21 am Post subject: |
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Newbie
Joined: 09 May 2008
Posts: 8
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I have a commercial application which sometimes hangs and stops pulling messages from the que. The que starts filling up if I donot restart the client application. I have been unable to figure out what causes the issue in the application (could be application or network or the MQ server). I want to write a small script which will count the messages in the ques so I can get notified when the number of messages exceed a threshold number.
| mqjeff wrote: |
Why do you need to know how many messages are on the queue?
Here's a big hint - you almost certainly don't. |
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| Vitor |
| Posted: Wed Apr 08, 2009 11:14 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| rmalghan wrote: |
| I can get notified when the number of messages exceed a threshold number. |
Use a DEPTH trigger.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| mqjeff |
| Posted: Wed Apr 08, 2009 11:15 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| Vitor wrote: |
| rmalghan wrote: |
| I can get notified when the number of messages exceed a threshold number. |
Use a DEPTH trigger. |
Use a Queue Depth High Event... |
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| rmalghan |
| Posted: Wed Apr 08, 2009 11:36 am Post subject: |
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Newbie
Joined: 09 May 2008
Posts: 8
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Could you please help me understand what this means. Does this mean the MQ server will generate a message and insert into the same que when the que depth exceeds a threshold or does it put an event into another system que.
| mqjeff wrote: |
| Vitor wrote: |
| rmalghan wrote: |
| I can get notified when the number of messages exceed a threshold number. |
Use a DEPTH trigger. |
Use a Queue Depth High Event... |
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| mqjeff |
| Posted: Wed Apr 08, 2009 11:38 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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It puts an event message on a system event queue, that you can read.
There are SupportPacs that will give you sample code for reading these messages.
See the top of this page for more help. |
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| PeterPotkay |
| Posted: Wed Apr 08, 2009 11:40 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| rmalghan wrote: |
I want to write a small script which will count the messages in the ques so I can get notified when the number of messages exceed a threshold number.
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Or talk to your MQ Admin, and ask them to configure their MQ Monitoring tool to watch your queue and alert you when the conditions are satisfied to raise an alert.
_________________
Peter Potkay
Keep Calm and MQ On |
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| Vitor |
| Posted: Wed Apr 08, 2009 1:05 pm Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| rmalghan wrote: |
Could you please help me understand what this means. Does this mean the MQ server will generate a message and insert into the same que when the que depth exceeds a threshold or does it put an event into another system que.
| mqjeff wrote: |
| Vitor wrote: |
| rmalghan wrote: |
| I can get notified when the number of messages exceed a threshold number. |
Use a DEPTH trigger. |
Use a Queue Depth High Event... |
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But it's perhaps easier for a self-confessed newbie to start a triggered application than interpret an event message.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| mqjeff |
| Posted: Wed Apr 08, 2009 1:18 pm Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| Vitor wrote: |
| But it's perhaps easier for a self-confessed newbie to start a triggered application than interpret an event message. |
It's perhaps easier for a self-confessed newbie to do a lot of things than it is for them to do the right thing. |
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