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Message
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| carlosgouveiareis |
 Posted: Wed Dec 19, 2012 4:40 pm Post subject: producing a xml output in a Java Compute Node |
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Newbie
Joined: 06 Dec 2012
Posts: 5
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Hi, I am doing a project where I need to implement a JavaCompute node to interface with an external system.
The input is a XML doc and the output is a XML doc too with the returned result set from the external system, with a list. As the list is around 700 elements I need to find a way to create the XML in a more performant way than calling the createElementAsFirstChild() 700 times as I see in the IBM manual, http://publib.boulder.ibm.com/infocenter/wmbhelp/v7r0m0/index.jsp?topic=%2Fcom.ibm.etools.mft.doc%2Fac67180_.htm.
Can anyone help me on that.
Tanks and King Regards
Carlos
-----------example from IBM manual, for Java code and returning XMl -------------------------------------------
MbElement root = outMessage.getRootElement();
MbElement document = root.getLastChild().getFirstChild();
MbElement chapter2 = document.createElementAsLastChild(MbElement.TYPE_NAME,"Chapter",null);
// add title attribute
MbElement title2 = chapter2.createElementAsFirstChild(MbElement.TYPE_NAME_VALUE,
"title", "Message Flows");
This produces the following XML output:
<document>
<chapter title="Introduction">
Some text.
</chapter>
<chapter title="Message Flows"/>
</document> |
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| fjb_saper |
| Posted: Wed Dec 19, 2012 10:40 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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your link does not show any document in the right hand pane...
Any ways what is wrong with using the published API?
How can you tell it takes too much time? How big is the finished document?
And without setting the correct specific type your output will not produce an attribute....
Have fun 
_________________
MQ & Broker admin |
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| mqjeff |
| Posted: Thu Dec 20, 2012 4:08 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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You don't say where you are receiving the 700 elements from, or if you are receiving them as individual chunks of data or all as one bitstream.
If you are receiving them all as one bitstream, then what you should do is *parse* the bitstream into a message tree, rather than writing code that does it manually. (createElementAsLastChildFromBitstream)
If you are receiving them all as individual chunks, then how do you expect to do anything other than just treat them individually and do the same thing for all 700? |
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| kimbert |
| Posted: Thu Dec 20, 2012 5:17 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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| Quote: |
| the output is a XML doc too with the returned result set from the external system |
Please describe this 'external system' Is it a database? What form does the 'result set' take? A Java collection of some kind?
| Quote: |
| And without setting the correct specific type your output will not produce an attribute.... |
I agree - you will need to set the parser-specific type to XMLNSC.Attribute if you want an attribute in the output. |
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| carlosgouveiareis |
| Posted: Thu Dec 20, 2012 5:22 am Post subject: clarification |
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Newbie
Joined: 06 Dec 2012
Posts: 5
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Hi, thanks for the answers.
Clarifying, I will have the results in an array of elements of a Public Class like MyQueryResult {
private int ID;
private string Client;
private string Entity;
private string DOC_DATE;
private string DOC_FINAL_DATE;
Private float TotalValue;
...
}
I will receive all the data as all one not in chunks.
So I will have in average 700 elements in the array and I need to return the entries as XML doc like this one:
<root>
</element>
<ID/> <Client/> <Entity/>
</root>
My question is that there is a way of creating the corresponding XML doc without having too call createElementAsFirstChild for each element ?
Many thanks
Carlos |
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| kimbert |
| Posted: Thu Dec 20, 2012 5:27 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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| Quote: |
| My question is that there is a way of creating the corresponding XML doc without having too call createElementAsFirstChild for each element ? |
Not if you want to use the XMLNSC parser to write the XML for you. The XMLNSC parser always and only works with message trees.
Are you sure that you have a performance problem? Or are you just concerned that a problem might appear? |
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| McueMart |
| Posted: Thu Dec 20, 2012 6:00 am Post subject: |
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Chevalier
Joined: 29 Nov 2011
Posts: 490
Location: UK...somewhere
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My guess is that broker can process 700 calls to createElementAsFirstChild() significantly quicker than:
- Connecting to the 'external system'
- Querying for the data you want
- Waiting for it to return the response.
Benchmark it and let us know! |
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