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| AITKENM |
 Posted: Fri Apr 01, 2005 2:32 am Post subject: MQRFH MQRFH2 |
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Newbie
Joined: 19 Mar 2005
Posts: 3
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Hi,
I am developing an app to simply read messages from a queue. I am a little confused as to the best practise for handling different header values. At the moment I check to see if the message descriptor Format is MQRFH. If it is I cast the message recived to a MQRFH and then use the format field of that to determine if I have a MQRFH2 header. Is this correct or is there a preferred way of doing this.
Thanks
Mark. |
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| malammik |
| Posted: Fri Apr 01, 2005 6:53 am Post subject: |
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Partisan
Joined: 27 Jan 2005
Posts: 397
Location: Philadelphia, PA
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| AITKENM |
| Posted: Fri Apr 01, 2005 7:40 am Post subject: |
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Newbie
Joined: 19 Mar 2005
Posts: 3
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Hi Thanks for the feedback, Basically I am writing in CPP. If the MD Format is MQRFH then I cast the Data received to one of those structures, I then can access the header information through my pointer. Will the MD Format ever be MQRFH2?
Cheers
Mark. |
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| malammik |
| Posted: Fri Apr 01, 2005 7:44 am Post subject: |
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Partisan
Joined: 27 Jan 2005
Posts: 397
Location: Philadelphia, PA
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| EddieA |
| Posted: Fri Apr 01, 2005 9:46 am Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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But RFH and RFH2 headers have different Format names:
| Quote: |
MQFMT_RF_HEADER 'MQHRFbbb'
MQFMT_RF_HEADER_2 'MQHRF2bb'
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So, you can't use the Format for one, but the "payload" for the other.
Cheers,
_________________
Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0 |
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| fjb_saper |
| Posted: Fri Apr 01, 2005 1:52 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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And I would be very carefull with all that "casting".
Think about pointer/memory overflows and all that stuff.
Enjoy  |
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