How to handle messages "just before" sending to DLQ ?

[dasmurali]

In my application we had multiple modules which are deployed in different JBoss servers (JBoss 5.1 and JBoss 4.2.2). All the key modules will talk asychronously (using JMS).

For the fail over messages auditing, I need to track the messages "just before"(i.e "handleRedeliveredMessage()" returns TRUE) redelivering to DLQ and audit them. Is there any mechnisum like intercept the call just before redelivering to DLQ(i.e before "sendToDLQ(msg)") by using interceptors?

Or shall use the same logic as "JBossJMS RA GenericDLQHandler" doing?

Thanks and Regards

Murali Reddy

[jaikiran]

Why not configure your own custom DLQ and then have a MDB which listens to that queue and add the auditing code there?

[dasmurali]

Hi Jaikiran,

Thanks allot for your reply. I think, I had two ways to resolve this.

First one will be as you mentioned use separate DLQ+MDB which will do auditing.

Second solution(I prefers it) is to have a custom DLQHandler implementaion (extending "GenericDLQHandler") and handle auditing before redelivering to DLQ(i.e after "handleDelivery()"). And configure this custom DLQHandler in our custom "invoker".

I am not sure about the trade offs. What is your take on both approaches?

Thanks and Regards

Murali Reddy

[jaikiran]

My guess is that the second approach that you mention isn't going to work as soon as you move to a different JMS provider (like in AS6 where HornetQ is used).

[dasmurali]

How the HornetQ RA (hornetq-ra.rar) is handling the DLQ logic?

I guess(please correct me if wrong) the DLQ logic is provided by both JMS providers (like JBoss Messaging/HornetQ) and resource adapters (like jms-ra.rar and hornetq-ra.rar). And the resource adapter DLQ logic will override JMS Provider logic(again this is my guess only).

So once we moved to JB6/HornetQ, the DLQ logic will be handled by JMS Provider(i.e HornetQ) only?

Thanks and Regards

Murali Reddy

[jaikiran]

KVMKrishna Reddy wrote:

How the HornetQ RA (hornetq-ra.rar) is handling the DLQ logic?

I don't really know, and that's why I said "I guess"