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| VijayGoparaju` |
 Posted: Tue Sep 16, 2008 2:22 am Post subject: How to convert MessageID and Corelated ID into Integers |
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Acolyte
Joined: 26 Aug 2008
Posts: 72
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Hello All,
I have a Requirement. I want to get the corresponding MessageId of a Message and display the number in a Text Box. And also wanto to convert Message Id and Corelated Id into Integers. How to do that?
Please Help me,
Thanks,
Vijay... |
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| Mr Butcher |
| Posted: Tue Sep 16, 2008 2:29 am Post subject: |
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Padawan
Joined: 23 May 2005
Posts: 1716
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excellent idea. so the highest integer for a messageid is then
6,2771017353866807638357894232077e+57 -1 (2**192 -1)
have fun with that.
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Regards, Butcher |
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| VijayGoparaju` |
| Posted: Tue Sep 16, 2008 2:32 am Post subject: |
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Acolyte
Joined: 26 Aug 2008
Posts: 72
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I want to retrieve a particular message with that Message Id from the Queue.
Please tell is is possible or not?,
Vijay. |
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| Mr Butcher |
| Posted: Tue Sep 16, 2008 2:35 am Post subject: |
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Padawan
Joined: 23 May 2005
Posts: 1716
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read the application programmers guide and application programmers reference, the information you are looking for is in there.
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Regards, Butcher |
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| VijayGoparaju` |
| Posted: Tue Sep 16, 2008 3:31 am Post subject: |
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Acolyte
Joined: 26 Aug 2008
Posts: 72
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Then, Is there no way to retrieve a particular message? MessageId is not working.I am not getting the value of the message in the Message id.
Vijay... |
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| mqjeff |
| Posted: Tue Sep 16, 2008 4:05 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| Mr Butcher wrote: |
| read the application programmers guide and application programmers reference, the information you are looking for is in there. |
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| bower5932 |
| Posted: Tue Sep 16, 2008 4:08 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| If you want to display the message id/correlation id, then look at amqsbcg and you can use that code to display the hex value. |
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| bruce2359 |
| Posted: Tue Sep 16, 2008 5:41 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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To get a message with a particular msgid or correlid, search for match options in the Application Programming Reference and Application Programming Guide.
Look at the MQMD (message descriptor) Msgid and correlid fields. These are 24 BYTE fields - not CHAR (character) fields. As such, they don't convert to anything of value (interest), other than being unique (if generated by the qmgr).
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| gbaddeley |
| Posted: Tue Sep 16, 2008 7:29 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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As has been said, MsgId and CorrelId are both 24 byte fields that contain binary information. They are not converted by MQ like the character fields in the Message Descriptor. If you want a human visible or usable representation, convert them to and from hexadecimal (ie. 48 characters of 0-9 A-F).
Representing them as integers (signed or unsigned) is not very useful as it will be platform dependent. Why were you thinking of doing this?
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Glenn |
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| VijayGoparaju` |
| Posted: Tue Sep 16, 2008 7:44 pm Post subject: |
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Acolyte
Joined: 26 Aug 2008
Posts: 72
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| I want to get a particular message from the Queue.If I know the Msg ID and Cord ID i will get that particular message thats why... |
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| bruce2359 |
| Posted: Tue Sep 16, 2008 9:19 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| Quote: |
| I want to get a particular message from the Queue. If I know the Msg ID and Corel ID... |
How get a message by msgid AND correlid:
Move the msgid of the message that you want to get to the MQMD_MSGID field of the message descriptor; then move the correlation id of the message you want to get to the MQMD_CORRELID. When you do the next MQGET, you will get the message with that msgid and correlid - but only that message exists in the queue.
This is all documented in the WMQ Application Programming Guide, in a section entitled "Getting a particular message"
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| gbaddeley |
| Posted: Wed Sep 17, 2008 6:21 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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| VijayGoparaju` wrote: |
| I want to get a particular message from the Queue.If I know the Msg ID and Cord ID i will get that particular message thats why... |
No problem. You can copy them to/from the MsgId & CorrelId fields in the message descriptor and 24 byte arrays in your program. No need for integers.
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Glenn |
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| bruce2359 |
| Posted: Thu Sep 18, 2008 6:49 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| Quote: |
| If I know the Msg ID and Correl ID... |
It is not usually necessary for a person to know the msgid and/or correlid of a message. IBM suggests that msgid and correlid be used for applications using the request-reply design model.
The request-reply application design model briefly explained:
The usual request-reply model is for program A to put a request message with a unique msgid to a queue; then program B gets the message, composes a reply message, and moves the inbound (from program A) msgid to the outbound reply message correlid, and puts the reply message to the reply-to-queue.
Program A then gets the reply message from the reply-to-queue, compares the msgid in the request message it sent to program B, with the reply from program B. If the msgid = correlid, then it is the reply program A expected.
This is explained in the APG.
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| VijayGoparaju` |
| Posted: Fri Sep 19, 2008 1:15 am Post subject: |
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Acolyte
Joined: 26 Aug 2008
Posts: 72
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| Problem is solved Thank you very much... |
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