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| MDB Message Exception Processing |
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| srinivasACN |
 Posted: Thu Aug 11, 2005 11:56 am Post subject: MDB Message Exception Processing |
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Apprentice
Joined: 08 Aug 2005
Posts: 43
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I have a general question regarding MDB's and message processing.
We are working on a high profile application where data retention is key. So my question is, if I pull a message off of my MQ queue in my application and later on down the line of processing if I encounter an exception, is there a way to roll that message back onto the queue.
thanks. |
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| jefflowrey |
| Posted: Thu Aug 11, 2005 12:27 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Define "later on down the line"?
Also, consider learning what a "transaction" is, and how to use one.
And maybe consider learning J2EE before you try using it, too.
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I am *not* the model of the modern major general. |
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| srinivasACN |
| Posted: Thu Aug 11, 2005 12:49 pm Post subject: |
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Apprentice
Joined: 08 Aug 2005
Posts: 43
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| jefflowrey wrote: |
Also, consider learning what a "transaction" is, and how to use one.
And maybe consider learning J2EE before you try using it, too. |
If this is a genuine recommendation, thanks. I just noticed the developers prior to me, defined BMT in the deployment descriptor. So i will be using the javax.jms.UserTransaction interface to do this.
If this is a put down or some sort of ego boost, I am sorry to say but there is no need for that.
Either way appreciate your help. |
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| vennela |
| Posted: Thu Aug 11, 2005 1:38 pm Post subject: |
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Jedi Knight
Joined: 11 Aug 2002
Posts: 4055
Location: Hyderabad, India
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| srinivasACN wrote: |
If this is a put down or some sort of ego boost, I am sorry to say but there is no need for that.
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Infact there is a need for you to learn some basics, especially in the area you are working on.
Transactional processing in one of the very basics for a J2EE guy and Jeff was pointing you to go through some of them. If you had some knowledge about transactional processing, you wouldn't frame the question that way.
| Quote: |
| So i will be using the javax.jms.UserTransaction interface to do this. |
Not sure what this is but maybe helpful. |
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| jefflowrey |
| Posted: Fri Aug 12, 2005 5:25 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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If you do not have a good understanding of transactions, particularly in a J2EE environment and the way that J2EE handles transactions, you can get yourself into trouble that can be both large and subtle. This kind of thing can blow a project way off course.
If "the developers prior to you" are still available, it would be a good idea for you to spend some time discussing this situation with them, and why they chose to use Bean Managed Transactions. Otherwise, it would be a good idea to review this with a senior developer or the architect.
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