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| how to get the sub xml string in the java compute node |
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Message
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| blackwhites |
 Posted: Tue Jan 27, 2009 7:11 pm Post subject: how to get the sub xml string in the java compute node |
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Novice
Joined: 23 Jan 2009
Posts: 10
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Hi all,I want to extract the part of xml String from the message broker how can I do it? For example the following is my sending xml
| Code: |
<?xml version="1.0" encoding="UTF-8"?>
<customer>
<name>Leo</name>
<phone>12345678</phone>
<type>VIP</type>
<desc>Plugin Testing</desc>
</customer>
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I write a java compute node to handle it .
/**
* @see com.ibm.broker.plugin.MbNodeInterface#evaluate(MbMessageAssembly, MbInputTerminal)
*/
public void evaluate(MbMessageAssembly assembly, MbInputTerminal in) throws MbException {
MbMessage outMsg = null;
try{
outMsg = new MbMessage(assembly.getMessage());
MbOutputTerminal output = getOutputTerminal("out");
MbElement customerElement = outMsg.getRootElement ().getFirstElementByPath("/XML/customer");
//here I want to get the customerElement xml String
String xml= myapplication.method(xmlString);
MbMessageAssembly outputAssembly = new MbMessageAssembly(assembly, outMsg);
output.propagate(outputAssembly);
}finally{
if (outMsg != null){
outMsg.clearMessage();
}
}
}
You can see a bold line is my customer class ,the method has a parameter
it will invoke xml String. I want to pass the
| Code: |
<?xml version="1.0" encoding="UTF-8"?>
<customer>
<name>Leo</name>
<phone>12345678</phone>
<type>VIP</type>
<desc>Plugin Testing</desc>
</customer>
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to it ,the problem is I can get the Mbelement ,but when I used Mbelement.toString() method,it didn't return the xml I posted here,can anyone provide API for me to get this xml in evaluate method? Notes: my message used XMLNSC type. |
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| rekarm01 |
| Posted: Tue Jan 27, 2009 8:19 pm Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 1415
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If you're using XMLNSC, your argument for getFirstElementbyPath should probably contain "XMLNSC" instead of "XML".
MbElement.toString() does not serialize XML sub-trees for you. MbElement.toBitstream() could serialize the entire XML tree, but not a sub-tree.
You might have better luck using the ESQL ASBITSTREAM function with the FolderBitStream option.
If "myapplication.method()" is static, you can DECLARE it as an external procedure in your ESQL, and call it directly, and eliminate the java compute node. |
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| kimbert |
| Posted: Wed Jan 28, 2009 1:36 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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Looks as if you need the entire input bitstream, including the xml declaration.
So you need
| Code: |
| assembly.getMessage().toBitstream() |
rekarm01 is correct about the XML/XMLNSC thing. The message body is always the last child of the root node, and its name is the name of the domain ( 'XMLNS'/'XMLNSC'/'MRM'/'JMS'etc ). But I hope you knew that already  |
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| mqjeff |
| Posted: Wed Jan 28, 2009 2:31 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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You now have two separate answers telling you what you have asked how to do.
You almost certainly DO NOT need to do what you have asked how to do.
What business requirement are you trying to fulfill? What transformation of the XML message are you trying to accomplish, that you think you need the "XML string"? |
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| blackwhites |
| Posted: Wed Jan 28, 2009 5:17 pm Post subject: |
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Novice
Joined: 23 Jan 2009
Posts: 10
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Thanks for your guys reply.Actually I am developing a customer node ,
in the customer GUI ,I defined a xpath field , I need to extract the mqinput xml according to the xpath, then I will pass the extract xml to myapplication.method(xmlString) get the new xml,then I need to write the newxml to the MQOUTPUT . I am not sure I used this method is good for implementation .Also I need your sugestion for doing this business application . |
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