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| MQCONN and asterisk |
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| koami |
 Posted: Thu Aug 12, 2004 3:55 pm Post subject: MQCONN and asterisk |
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Novice
Joined: 28 Apr 2004
Posts: 10
Location: San Marcos, California - USA
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Hello!
Is there a way to MQCONN to an asterisk (*) in the distributed environment (Windows or AIX)?
I have a Client application I would like to modify to connect to an asterisk instead of a specific qmgr. I want the application to parse the MQClient Channel table and connect to the first Qmgr in the table; and if that queue manager is down, go down to the next one in the table and so on.
I am using amqsputc sample code for testing, I have changed the "qmgr" command line argument with "*" in the code.
When tried to run it without specifying a Qmgrname (amqsputc "QUEUENAME" ) I was getting the following:
"MQRC_Q_MGR_NOT_AVAILABLE"
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| Missam |
| Posted: Thu Aug 12, 2004 9:11 pm Post subject: |
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Chevalier
Joined: 16 Oct 2003
Posts: 424
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well first of all this is a question to be posted in API Support form.
| Quote: |
I am using amqsputc sample code for testing, I have changed the "qmgr" command line argument with "*" in the code.
When tried to run it without specifying a Qmgrname (amqsputc "QUEUENAME" ) I was getting the following:
"MQRC_Q_MGR_NOT_AVAILABLE"
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Using * in the sence,you (logically) know * means to connect to any queue manager in the client defintion table.but the application programs doesn't under stand that.they think that * is another character and try to connect to QueueManager Named '*' and fail to connect giving the error "MQRC_Q_MGR_NOT_AVAILABLE".so you need to come up with an implementation,when ever you see a * in the name of the queue manager.get the QM's listed in Client Channel Definition table and try connecting each one until you connect to one of them. |
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| PeterPotkay |
| Posted: Fri Aug 13, 2004 4:43 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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Applications can code "*" or "*QMname" in the MQCONN call.
When an app issues an MQCONN call, and a channel table is used, MQ starts searching the channel table alphabetically by channel name. It will attempt to use a particulat entry in the channel table using the following rules:
If you coded a qm name in the MQCONN call ("QM1"), you are telling MQ to only try entries in the channel table that have that exact name ("QM1") in the CLNTCONN definition. It will ignore any entries in the table that have any other QM name specified, and it will ignore any entries that have no QM name specified. It will try all those that meet that criteria, alphabetically by channel name, until a succeful connection is made or until it runs out of eligible entries in the table.
If you coded a qm name in the MQCONN call with an * ("*QM1"), you are telling MQ to only try entries in the channel table that have that any QM name ("QM1" or "QM2") in the CLNTCONN definition. It will ignore any entries in the table that have a blank QM parameter. It will try all those that meet that criteria, alphabetically by channel name, until a succeful connection is made or until it runs out of eligible entries in the table.
If you coded no qm name in the MQCONN call or only an * ("*" or " "), you are telling MQ to only try entries in the channel table that have NO QM name in the CLNTCONN definition. It will ignore any entries in the table that have a filled in QM parameter. It will try all those that meet that criteria, alphabetically by channel name, until a succeful connection is made or until it runs out of eligible entries in the table. You will only connect to a QM if it is designated as the default QM on the target server.
How amqsputc reacts when it sees a * on the command line, I don't know. But if it recognizes it internally and supplies it on its MQCONN call, the rules above apply.
_________________
Peter Potkay
Keep Calm and MQ On |
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| kirani |
| Posted: Fri Aug 13, 2004 10:14 pm Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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Please post API related questions into MQ API Forum.
[Moving to API Support Forum]
_________________
Kiran
IBM Cert. Solution Designer & System Administrator - WBIMB V5
IBM Cert. Solutions Expert - WMQI
IBM Cert. Specialist - WMQI, MQSeries
IBM Cert. Developer - MQSeries
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