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Message
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| Mirage |
 Posted: Thu Dec 09, 2004 7:41 am Post subject: Java Custom Node: getting MsgID from MbElement |
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Apprentice
Joined: 30 Nov 2004
Posts: 44
Location: IL
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Hi,
I'm working on reading the MsgID from the input message in my custom node. I've queried the input message and got MsgID as a MbElement object.
| Code: |
| MbElement msgIdElement = rootElement.getFirstElementByPath("/MQMD/MsgId"); |
I want to set this MsgId value into my MQ's MQMD java object for future reference and to compare the correlationId of another message.
| Code: |
MQMD reqMQMD = new MQMD();
reqMQMD.messageId = [b]--------------[/b] |
Here is my problem, filling the dashes in the code. MQMD.messageId expects a byte array, where as MbElement.getValue() returns a Java Object.
How can I set the value of MsgId to MQMD's messageId ?
When I printout msgIdElement.getValue(), its printed in ASCII. Can I convert this object into a byte array and assign to MQMD.?
Thanks - RR. |
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| JLRowe |
| Posted: Thu Dec 09, 2004 7:49 am Post subject: |
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Yatiri
Joined: 25 May 2002
Posts: 664
Location: South East London
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Cast to byte array:
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regMQMD.messageIf = (byte[])msgIdElement;
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| Mirage |
| Posted: Thu Dec 09, 2004 7:58 am Post subject: |
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Apprentice
Joined: 30 Nov 2004
Posts: 44
Location: IL
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Thanks Timna.
I dont know why I could not think of such a simple cast. Sometimes it just doesnt work.  |
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| Mirage |
| Posted: Thu Dec 09, 2004 10:06 am Post subject: |
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Apprentice
Joined: 30 Nov 2004
Posts: 44
Location: IL
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Hi ,
I changed the code to type cast to byte array and I'm storing the byte array in MQMD's messageId.
When I printout the values of these 2, there is a change in the value. I think the Message ID is getting changed when I type cast it. I'm not sure though.
| Code: |
MbElement msgIdElement = rootElement.getFirstElementByPath("/MQMD/MsgId");
logger.println("MSG ID's Value "+msgIdElement.getValue());
byte msgIdArray [] = (byte [])msgIdElement.getValue();
logger.println("Byte Array msgIdArray's value"+msgIdArray);
MQMD reqMQMD = new MQMD();
reqMQMD.messageId = msgIdArray;
logger.println("Length of MQMD "+msgIdArray.length);
logger.println("Message ID from MQMD after converted "+reqMQMD.messageId); |
Here is the output for the print statements.
| Quote: |
MSG ID's Value [B@f73672d
Byte Array msgIdArray's value[B@f62672d
Length of MQMD 24
Message ID from MQMD after converted [B@f62672d
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Am I doing anything wrong in copying the values ? Please suggest.
Thanks - RR. |
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| JLRowe |
| Posted: Thu Dec 09, 2004 10:25 am Post subject: |
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Yatiri
Joined: 25 May 2002
Posts: 664
Location: South East London
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The println's are giving you the address of the Object, not it's actual contents. String accepts a byte array as a constructor, and will convert the byte[] to a String.
Do this:
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System.out.println(new String(msgIdArray));
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| Mirage |
| Posted: Thu Dec 09, 2004 10:41 am Post subject: |
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Apprentice
Joined: 30 Nov 2004
Posts: 44
Location: IL
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I changed it to
| Code: |
| new String(msgIdArray); |
and the print statement was
| Quote: |
| AMQ MSGBRK_QM ?¸A |
Which is somewhat similar to the view from RFHUtil but not same.
Instead of comparing with these special characters, is there a way to convert this 24 byte array to the hex format. That way I can easily compare them with RFHUtil.
Does MQMD.messageID also point to the same memory location ?. In the print statements both are looking same. |
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