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| How to subscribe to a published Message |
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| motan |
 Posted: Sat Feb 21, 2004 11:29 am Post subject: How to subscribe to a published Message |
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Newbie
Joined: 21 Feb 2004
Posts: 2
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I am new at the this forum and to PUB/SUB model. Never used it. We have MQ version 5.2 on HP. A new project requires me to setup MQ to subscribe to a message published on a remote QM within our network and deliver this message to an application. This application can read messages from Queues. Currently we use a program to get messages of queues and to write the messages to file system.
What all I need - Patches, Support PACs?
I am guessing I would a new program to get these messages from the Queue (topic?) to deliver them to the application. Am I wrong or right?
And how do I go about doing the setup?
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| jefflowrey |
| Posted: Sat Feb 21, 2004 2:00 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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The subscriber program itself is just a standard MQSeries applications, that gets messages from queues.
The only thing that needs to be done is that the queue the application is reading from needs to be subscribed to the topic in question. This is done using a subscription message, which is placed on the broker queue.
The subscription message contains an MQRFH2 header that specifies that the message is a subscription request, and the topic to be subscribed to. The queue to receive subscriptions is set in the ReplyToQueue of the MQMD.
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| motan |
| Posted: Sat Feb 21, 2004 7:28 pm Post subject: |
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Newbie
Joined: 21 Feb 2004
Posts: 2
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Thanks Jeff.
So am I right to undersatnd that I do not need any updates, support pacs etc?
All I need is an application that can place a message ( with MQRFH Header stating that it is a subscription message, topic being subscribed and and the queue to which messages should be sent) on the broker. Any sample code for such application?
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| jefflowrey |
| Posted: Sun Feb 22, 2004 6:57 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| motan wrote: |
Thanks Jeff.
So am I right to undersatnd that I do not need any updates, support pacs etc?
All I need is an application that can place a message ( with MQRFH Header stating that it is a subscription message, topic being subscribed and and the queue to which messages should be sent) on the broker. |
Yes, that seems right.
| motan wrote: |
| Any sample code for such application? |
I think some has been posted here before, at least sample Java code to populate fields in an RFH2 header. Try the search button.
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