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MQSeries.net Forum IndexGeneral IBM MQ SupportSTANDARD NON-MQ MESSAGE HEADER

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PeterPotkay
PostPosted: Tue Jun 12, 2001 4:45 am Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7579

I'm going to be in a meeting where one of the topics of discussion
is including a standard company header in the first X amount of bytes in a
MQ message. The purpose of this header is to pass info that the MQMD lacks
yet that we feel we need. I know from reading the listserver that this is
generally considered a good idea, but can anyone out there give me some
examples? I'm curious as to what type of info we should be passing.


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Peter Potkay
Keep Calm and MQ On
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kolban
PostPosted: Tue Jun 12, 2001 5:46 am Post subject: Reply with quote

Grand Master

Joined: 22 May 2001
Posts: 1072
Location: Fort Worth, TX, USA

Any data that you pass in the MQSeries message body is completly at your discertion. From a technical perspective, there is nothing to prevent you from placing whatever data you feel appropriate at the start of the message. I suggest that you fix the format early on and include both a 4 character signature and a version integer in the first 8 bytes (as IBM does with its pre-defined headers). This allows both immediate detection of the header as well as the ability for the header to change in later revisions. In addition, you can design and implement a data conversion exit that "knows" how to convert your data from one format to another (e.g. character conversion and big/little endian conversion)
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