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| Adding a MQRFH2 header using MQ Java base classes |
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| aks |
 Posted: Sun Jan 18, 2004 3:16 pm Post subject: Adding a MQRFH2 header using MQ Java base classes |
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Voyager
Joined: 19 Jul 2002
Posts: 84
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There are a number of threads about this, but I don't know yet how to add MQRFH2 header to an instance of the base MQMessage class.
Eddie Atherton posted code to read a MQRFH2 header (http://www.mqseries.net/phpBB2/viewtopic.php?t=9911), but I can't find any code to create the header.
My requirement is to add some name/value pairs to the header for processing within an mqsi flow and also to read the information again using the Java MQ base api. I use the application Id data field in the mqmd header at the moment, but it has a maximum length of 32 characters and I need to set more than one value without restriction.
Can anyone help?
Thanks
Alan |
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| EddieA |
| Posted: Sun Jan 18, 2004 5:42 pm Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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Well a good starting point would be to change the readString to writeString and readInt to writeInt and see what you get.
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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| aks |
| Posted: Sun Jan 18, 2004 5:52 pm Post subject: |
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Voyager
Joined: 19 Jul 2002
Posts: 84
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But doesn't writeString etc write to the message body? How do you specifically set up the MQRFH2 header? With mqmd, one would write
mqMessage.applicationIdData = ... etc
Thanks
Alan |
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| EddieA |
| Posted: Sun Jan 18, 2004 7:08 pm Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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As far as MQ is concerned, the RFH2 header *IS* part of the payload. There is no way to make MQ create any of these secondary headers in any of the supported languages. Except for JMS, which builds an RFH2.
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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| jefflowrey |
| Posted: Mon Jan 19, 2004 6:01 am Post subject: Re: Adding a MQRFH2 header using MQ Java base classes |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| aks wrote: |
| I don't know yet how to add MQRFH2 header to an instance of the base MQMessage class. |
As EddieA said, the MQRFH2 is part of the payload. So the base MQMessage class doesn't have any getters or setters for the fields of the RFH2 header, and you have to use writeXXX() to populate the fields.
But there's nothing stopping you from creating your own subclass of MQMessage that does know how to build an MQRFH2, and supplies getters and setters (that behind the scenes do the writeXXX() or readXXX() calls). But you'll have to be careful about ordering the data. So that if someone calls writeXXXX on your object to populate some stuff in the body, and then calls one of your setters for the MQRFH that the header data doesn't get written after the message data.
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I am *not* the model of the modern major general. |
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