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| Ramesh_ka |
 Posted: Mon Dec 29, 2003 1:40 pm Post subject: Messages retrived from transmission Queue. |
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Novice
Joined: 24 Dec 2003
Posts: 13
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Hi,
I kept a text message into Remote Definotion using JMS API. While i am trying to retirve the text message it saying ClassCast Exception.
I am thinking that i kept the text message and while i am retriving i am typecasting to javax.jms.TextMessage.
can we retrive messages from TransmissionQueue. if so, can any thorogh some light on this how to cast the message comming from TransmissionQueue using JMS API.
I am trying hard can any one help me soon..
Regards
Ramesh |
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| leongor |
| Posted: Tue Dec 30, 2003 1:00 am Post subject: |
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Master
Joined: 13 May 2002
Posts: 264
Location: Israel
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What the goal you want to reach ?
Usually you can't get message from xmitQ because it's open with exclusive option by a channel.
_________________
Regards.
Leonid.
IBM Certified MQSeries Specialist. |
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| Ramesh_ka |
| Posted: Tue Dec 30, 2003 8:09 am Post subject: |
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Novice
Joined: 24 Dec 2003
Posts: 13
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Hi,
My main goal is. If i have 10 messages in the TransmissionQueue Which is triggered for depth 10. But i want to trigger on depth and time. Since time is not possible in MQ.
Before tiggering i want my java program to browse the transmissionQueue and calliculate the date. if the requirements match then i want to take the message from the queue before triggering and place it into another queue.
for this reason i want to read the messages from Transmission Queue.
Today while i made some trials i can receive mesage but the message is BYtesMesage. Can you help me how to convert the received byt message to a String message or Text message using java or jms API.
Thank u very much for your inputs and thanks in advance.
Regards
Ramesh |
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| Michael Dag |
| Posted: Tue Dec 30, 2003 9:22 am Post subject: |
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Jedi Knight
Joined: 13 Jun 2002
Posts: 2607
Location: The Netherlands (Amsterdam)
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I still not completely get what you are trying to do.
Is the channel supposed to start when 10 messages are on it AND a certain time is expired OR a certain time is expired? Is there a dial-up connection involved?
Michael |
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| EddieA |
| Posted: Tue Dec 30, 2003 9:43 am Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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The problem with the message 'data types' is probably because the message, when read from the XMITQ, has the XMIT header as the first part of the message payload, followed by the actual message.
Instead of trying to manipulate the XMITQ, can you get the application to write to a Local Queue. Run your 'smoke and mirrors' on THAT queue, and when your're happy, put them to the correct Remote Queue.
Cheers,
_________________
Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0 |
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| jefflowrey |
| Posted: Tue Dec 30, 2003 9:44 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Have you looked at the documentation about Transmission queues?
Were you aware that messages on a Transmission queue have a special type of header (that is not an MQMD header)?
_________________
I am *not* the model of the modern major general. |
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| tkane |
| Posted: Wed Dec 31, 2003 8:39 am Post subject: |
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Voyager
Joined: 23 Dec 2002
Posts: 82
Location: Kansas City
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Ramesh,
I'm more wondering about the design here than the how to get the message off the queue in JMS.
From my point of view MQ is a messaging and queueing system.
Applications put messages to queues and get messages from queues.
Systems (infrastructure) include channels and xmitqs pass those messages for the applications.
I work in a very large environment and in most cases the xmitqs serve multiple applciations. The only things that I want reading the xmitqs are the channels and myself as the MQ Admin when somebody is having a problem and we resort to the old method of browsing the messages on the queues to figure out what's wrong.
I think good design splits the two areas. Applications should worry about putting messages and getting messages. There are several features (expiry, COA, COD, report messages in the MQ API that can help you do this). I don't know if they are in the JMS API, I'm just starting to look at Java and JMS after 7 years of COBOL and C.
Tom
Certified a long time ago - does anybody remember when there was only 1 IBM MQ cert? |
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| prasannal |
| Posted: Sun Jan 11, 2004 1:13 am Post subject: Reading Transmission Queue |
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Apprentice
Joined: 04 Aug 2003
Posts: 44
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Hi,
I am reading about Remote Queues.
So, Is there a way through which I can read messages lying in XMITQ and GET them destructively?
Also I had one doubt Can I use same transmission Queue for messages going to different Remote Queues?
Thanks. |
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| jefflowrey |
| Posted: Sun Jan 11, 2004 8:11 am Post subject: Re: Reading Transmission Queue |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| prasannal wrote: |
| So, Is there a way through which I can read messages lying in XMITQ and GET them destructively? |
Yes. If the channel is stopped. You shouldn't need to and you shouldn't want to, though - at least in the course of normal business.
| Quote: |
| Also I had one doubt Can I use same transmission Queue for messages going to different Remote Queues? |
Yes. It is typical to have one XMIT queue per sender channel.
You should really read the Intercommunications Guide, if you're asking questions like these. It will save you and us time.
_________________
I am *not* the model of the modern major general. |
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