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| petefrancis |
 Posted: Tue Jan 22, 2002 7:46 am Post subject: |
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Newbie
Joined: 21 Jan 2002
Posts: 6
Location: London, England
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I am using a message driven bean to pick up data messages and MQSeries reports from an MQSeries queue. The data messages that I'm receiving in my MDB can be cast to TextMessage and then dealt with. The reports are arriving but I am having trouble interpreting them. I don't seem to be able to cast the MQSeries report messages or extract any data from them. How can I do this?
Thanks in advance
Peter Francis |
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| kolban |
| Posted: Tue Jan 22, 2002 8:33 am Post subject: |
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Grand Master
Joined: 22 May 2001
Posts: 1072
Location: Fort Worth, TX, USA
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| I strongly suspect that the report messages coming back may be binary. Can you dump an instance of a report message prior to it being picked up? For example using the amqsbcg sample tool or MQJExplorer? |
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| petefrancis |
| Posted: Tue Jan 22, 2002 10:16 am Post subject: |
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Newbie
Joined: 21 Jan 2002
Posts: 6
Location: London, England
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| They are just the standard MQSeries report messages that appear on the MQSeries queue. I thought that I would be able to cast it to MQMessage but that doesn't seem to have worked. Any ideas? |
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| kolban |
| Posted: Tue Jan 22, 2002 2:31 pm Post subject: |
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Grand Master
Joined: 22 May 2001
Posts: 1072
Location: Fort Worth, TX, USA
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| I think were getting some wires crossed here. MDB, OnMessage and TextMessages are all components of JMS. MQMessage is a component of base MQ Java. Assuming your MDB wakes up in its MessageListener in an OnMessage callback then you already have a Message object reference. The question is ... what can you cast this to? My bet will be that only ByteMessage will be allowed. |
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| petefrancis |
| Posted: Wed Jan 23, 2002 2:44 am Post subject: |
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Newbie
Joined: 21 Jan 2002
Posts: 6
Location: London, England
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Yeah, sorry, I'll try to be a bit clearer. The messages are being put onto MQSeries using the straight MQ API. The report options are being set as follows:
msg.report = MQC.MQRO_COA + MQC.MQRO_COD;
The reports are being generated correctly and put onto another MQSeries queue called report. I want to use an MDB to pick up these reports and process the results. Is this allowed/possible/good practice?
Some other messages are being put onto an MQSeries queue using the MQ API and being picked up by an MDB without problems. However, these are purely text and can be casted to a TextMessage inside the MDB and then processed. |
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| kolban |
| Posted: Wed Jan 23, 2002 8:08 am Post subject: |
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Grand Master
Joined: 22 May 2001
Posts: 1072
Location: Fort Worth, TX, USA
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| I see no problem with having report messages ... which are simply no more and no less than regular MQSeries messages with report information content, being read by an MDB associated to the queue into which the report messages are arriving. At the very least, the messages can be consumed as ByteMessages and "maybe" as TextMessages. |
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| petefrancis |
| Posted: Wed Jan 23, 2002 8:30 am Post subject: |
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Newbie
Joined: 21 Jan 2002
Posts: 6
Location: London, England
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Thats what I would have though but I get a CastException when I try to do a cast to any of the message types. Also when I call the getJMSType() method it returns null. If I look at the message using MQ Explorer (by turning off my MDB) it does not appear to carry any data, I think it just has header info. If an MQ report message was being consumed by the normal MQ API rather than an MDB would it an MQMessage?
Has anyone got this working? |
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