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MQSeries.net Forum Index » General Discussion » Purpose of a "Topic String"

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sbuster
PostPosted: Thu Oct 30, 2008 12:20 pm    Post subject: Purpose of a "Topic String" Reply with quote

Apprentice

Joined: 07 Oct 2008
Posts: 25
I'm using MQ 7 Pub/Sub capabilities and was wondering what the "Topic String" property on a topic is for?
Here is my reason for asking. I have a Topic named INPUT.TOPIC defined with a Topic String of "input". I then created a Message Driven Bean and deployed it on Websphere 6.1. The MDB receives messages if I create a simple test program from Java using JMS. However, if I go into MQ Explorer and create a "Test Publication" (the topic string is to "input" by default) and publish a message, it doesn't get pushed to the MDB. If I change the topic string to "INPUT.TOPIC" the MDB does get the message.
If someone could help me with this I would appreciate it.

thanks
steve
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gbaddeley
PostPosted: Thu Oct 30, 2008 6:01 pm    Post subject: Reply with quote

Jedi Knight

Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
The TopicString property of a TOPIC object associates the topic string (and maybe its subordinates) with that object for security and administrative control purposes. In MQ, opening the TOPIC object is equivalent to opening its TopicString, although normally apps should always using the topic string and have no knowledge of TOPIC object names.

Try the sample programs amqspub and amqssub on the topic string. Its probably a mis-match problem with upper/lower case or other characters you may have included in the topic string.
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Glenn
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