MQSeries.net :: View topic - need to combine two incoming messages into one message

rimple · Posted: Fri Aug 05, 2005 1:47 am Post subject:

My requirement is such that there will be two messages of diiferent format(Payee payment and Bill payment) being put on the same q, and I have to combine them.

Can someone please guide how to do this ? Which of the following approaches should I take ? also what precautions do I need to take?

Possible Approaches:
1. group them with same msg id and group id :
Set property of q as process msgs in groups. It'll send msgs with same group id and msg id.
I'll save the first message in DB and then on the arrival of second message I'll retrive the frst one from DB and combine both.
Precautions which we need to take :
Pls make sure only one msg of payee payment and 1 of Bill payment arrive with same msg id and group id and nothing else than it
Take 1 msg, put it in DB. Take 2nd msg, pick the first 1 frm DB, combine them and create o/p msg.

Can commit by group property of MQInput help here by any ways?

2. how abt two separate flows to start depending on topic as Payee payment or Bill payment.
1 flow wud take paye payment and 2nd would take bill payment. And then one of them, say payee payement would save msg in DB. And other one Bill payment would retrive that from DB, combine them and create a combined message.

3. aggregate req / reply :
I read about aggregatereply node but I couldn't understand anything.

4. If none of the above can work, then I'll put the two msgs in two diff queues and group them on basis of msg id :
connect two input nodes to same compute node.
Or tht doesn't work, then Take 1 msg, put it in DB. Take 2nd msg, pick the first 1 frm DB, combine them and create o/p msg.
Precautions :
Pls make sure abt msg id and sequence and timing of the msg.