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| MQMessage Message Ids |
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| Author |
Message
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| Richard McCarthy |
 Posted: Tue Apr 23, 2002 5:39 am Post subject: |
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Newbie
Joined: 17 Mar 2002
Posts: 2
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After a message has been read from a queue should you be able to see the valid messageId in the MQMessage object even if you have not specifically read on a message Id ?
My reason for asking is that I have read a message ok and I know it had a messageId as I saw it via MQ explorer but I always get back a byte [] which only contains zeroes.
Also if the messageId should be correct would the same also be true of the correlationId and groupId's ?
Any help would be much appreciated,
Thanks,
Richard |
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| bower5932 |
| Posted: Tue Apr 23, 2002 11:30 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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I used the following code fragment:
MQGetMessageOptions gmo = new MQGetMessageOptions();
gmo.options = MQC.MQGMO_WAIT;
MQMessage myMessage = new MQMessage();
try {
/*****************************************/
/* Reset the message and IDs to be empty */
/*****************************************/
myMessage.clearMessage();
myMessage.correlationId = MQC.MQCI_NONE;
myMessage.messageId = MQC.MQMI_NONE;
/**************************************************/
/* Browse the message, display it, and ask if the */
/* message should actually be gotten */
/**************************************************/
myQueue.get(myMessage, gmo);
String msg = myMessage.readString(myMessage.getMessageLength());
for (int i=0; i<24; i++) {
System.out.print((char)myMessage.messageId[i] + " ");
}
System.out.println();
System.out.println("MsgId: " + myMessage.messageId);
System.out.println("corId: " + myMessage.correlationId);
} catch (MQException ex) {
/**************************************************/
/* Probably encountered our no message available: */
/* write out error and mark loop to be exited */
/**************************************************/
System.out.println("MQ exception: CC = " + ex.completionCode
+ " RC = " + ex.reasonCode);
} catch (java.io.IOException ex) {
System.out.println("Java exception: " + ex);
}
and I can get out the message id of the message that I got. The message id is actually a byte string, so it isn't 100% valid to print it out in char format. I wasn't sure how to use a hex qualifier on the print.
[ This Message was edited by: bower5932 on 2002-04-23 13:46 ] |
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