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| How to remove MQMD header within MbMessageAssembly |
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Message
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| Mohit Gupta |
 Posted: Wed Nov 17, 2004 10:35 pm Post subject: How to remove MQMD header within MbMessageAssembly |
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Apprentice
Joined: 16 Sep 2004
Posts: 34
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Hi,
I have written a java plugin custom node which extends MbNode and implements MbNodeInterface. In the evaluate method i am getting the bytes of the message MbMessage msg = arg0.getMessage();
byte[] bitstream = msg.getBuffer();
then i pass this byte array or write it out to the output device but i get some characters on the first line definitely its the message header . I want to skip the message header only message body how do i achieve that.
Cheers,
Mohit |
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| kishoreraju |
| Posted: Thu Nov 18, 2004 4:44 am Post subject: |
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Disciple
Joined: 30 Sep 2004
Posts: 156
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why don't you try to make them Null before coming to the plugin node.is thre any problem to do like this
OutputRoot.MQMD=null; |
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| kirani |
| Posted: Thu Nov 18, 2004 12:39 pm Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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Your MessageBuffer will include Properties, MQMD and Data sections. In your plug-in node you need to first get a reference to "Data" part and then create a bitstream out of it.
_________________
Kiran
IBM Cert. Solution Designer & System Administrator - WBIMB V5
IBM Cert. Solutions Expert - WMQI
IBM Cert. Specialist - WMQI, MQSeries
IBM Cert. Developer - MQSeries
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| Mohit Gupta |
| Posted: Thu Nov 18, 2004 9:45 pm Post subject: |
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Apprentice
Joined: 16 Sep 2004
Posts: 34
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Kishore if i set the OutputRoot.Properties and OutputRoot.MQMD to NULL then broker is throwing an exception and i want to extract some info from the message header like timestamp , filename , batch id etc.
So i have to first read mqmd extract some info and then pass the data alongwith the info from MQMD.
Kirani that's the problem i am facing how to extract Properties , MQMD and Data part out of the buffer. if you see the evaluate method it accepts MbMessageAssembly which gives four methods getExceptionList , getLocalEnvironment , getGlobalEnvironment and getMessage. within getMessage i got the entire message containing Properties and MQMD , now assembly.getMessage returns Message object which doesn't give the methods to extract Properties and MQMD.
Although i manage to do in a dirty way like this..
public void evaluate(MbMessageAssembly arg0, MbInputTerminal arg1)
throws MbException {
MbMessage msg = arg0.getMessage();
byte[] msgdata = msg.getBuffer();
String data = new String(msgdata);
// starting point of my data
int pos = data.indexOf("1,");
data = data.substring(pos);
byte[] bitstream = data.getBytes();
}
Cheers,
Mohit |
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| kirani |
| Posted: Thu Nov 18, 2004 11:41 pm Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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Yes, it does. You have to use MbElement class. You can search an element by name also.
Take a look at the sticky on the top of this forum. You will find links to some very good Redbooks, which explain plug-in nodes at very detailed level. They also provide some sample code.
_________________
Kiran
IBM Cert. Solution Designer & System Administrator - WBIMB V5
IBM Cert. Solutions Expert - WMQI
IBM Cert. Specialist - WMQI, MQSeries
IBM Cert. Developer - MQSeries
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