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| Inherit IBM.WMQ.[WMQAX].MQMessage in .Net |
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Message
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| ewilliams |
 Posted: Tue Jun 07, 2005 12:01 pm Post subject: Inherit IBM.WMQ.[WMQAX].MQMessage in .Net |
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Apprentice
Joined: 27 Nov 2002
Posts: 30
Location: Portland
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Is it possible to Inherit the MQMessage class and acutally us it? I have tried both the WMQ and WMQAX (which inherits from the WMQ one) and can not seem to use the writestring method.
Is anyone else doing this? If not, could a .Net WMQ developer out there give it a shot and verify or not the issue I am having.
I've tried on both WMQ 5.3 CSD 09 and WMQ 6.0. WMQ 5.3 just doesn't do anything and WMQ 6.0 will throw an IO.EndOfStreamException.
| Code: |
Imports IBM.WMQAX
Imports IBM.WMQ.MQC
Module Module1
Sub Main()
Dim mqMsg As MQUtil = New MQUtil
With mqMsg
.Format = MQFMT_STRING
.PutApplicationType = MQAT_WINDOWS_NT
.CharacterSet = MQCCSI_Q_MGR
.Encoding = MQENC_NATIVE
.Priority = MQPRI_PRIORITY_AS_Q_DEF
.Persistence = MQPER_PERSISTENCE_AS_Q_DEF
.WriteString("FOOBAR")
End With
End Sub
End Module
Public Class MQUtil
Inherits IBM.WMQAX.MQMessage
End Class |
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| fjb_saper |
| Posted: Tue Jun 07, 2005 12:46 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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If you subclass the MQ message you will need to remember to extract it when you process your MQputs. Same thing.. the MQget will not return an instance of your wrapper but an instance of the original. It will be up to you to map it.....
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| ewilliams |
| Posted: Tue Jun 07, 2005 10:41 pm Post subject: |
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Apprentice
Joined: 27 Nov 2002
Posts: 30
Location: Portland
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That is sort of what I have now and was hoping to leverage some inheritance to cut down on the yuck factor in my class.
So what design would make a good .Net Class for an application?
In our shop we are using all Xml/Flat File data in our MQS messages so string functions are all we really need at this time. The usual Put Message, Browse Message and Remove Message but there is a need for get data from the header as well.
Any Thoughts/Suggestions? |
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| jefflowrey |
| Posted: Wed Jun 08, 2005 3:18 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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There's only so much of the MQ API that it is really feasible to abstract out rom an application. The difficulties come in because each abstraction tries to set a "default behavior" - and that is usually not sufficient for all business cases. So then you have to write more abstractions, or expose more of the MQ API, to allow programmers the ability to do the things they need to do.
In any case, I would use a wrapper pattern rather than a direct inheritance.
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I am *not* the model of the modern major general. |
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