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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » Rollback to Input Queue from SAPRequest Node

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tatyeong
PostPosted: Thu Mar 03, 2011 6:48 am    Post subject: Rollback to Input Queue from SAPRequest Node Reply with quote

Acolyte

Joined: 16 Apr 2010
Posts: 52
Hi,

I have message a flow that looks like this


MQInput --> Compute --> SAPRequest
|
V
Catch flow

My catch flow handles all the exceptions that are generated beyond it.

I want to handle internal error that occurs in the SAPRequest node (e.g. unable to reach SAP system) by rolling back the message to the input queue.

I supposed the right way to do this is to connect the failure terminal on the SAPRequest node with a Throw node? Will this message then be captured by the catch flow? Does it mean I also have to include a Throw node within the catch flow in order for the message to be rollback to the input node?

Appreciate any advice on this.
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MrSmith
PostPosted: Thu Mar 03, 2011 8:37 am    Post subject: Reply with quote

Master

Joined: 20 Mar 2008
Posts: 215
connecting the failure terminal to a throw node the best way for it to return back to the input node where if your catch node is connected it will proceed to conclusion down this route providing no other failures happen, this should be the end of the transaction for that message.
If the catch terminal is not wired it will go back on to the input queue and check if the backout threshhold is exceeded, if execeeded the fail path of the input node, if not exceeded the backout queue obviously, if no fail path and no backout queue the dead letter queue of the QM.

do not see why you would want to deliberatley throw in the catch path tbh for it to then go up the failure path, choose where you want to capture your exceptions and then do it there, the fail path should be wired only because the catch path has genuinely failed not becvause you forced it.
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