I would use a Keyed Queue, leaving the queue entry on the queue. Upon
successful completion look up the queue entry by key and then remove it.
That way you are assured of getting the correct queue entry on the second
read.
--
Jim Oberholtzer
Agile Technology Architects
-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of David
Gibbs via RPG400-L
Sent: Monday, September 23, 2019 11:44 AM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Cc: David Gibbs <david@xxxxxxxxxxxx>
Subject: Re: Use DTAQ unter Commitment Control to implement Acknowledgement
On Mon, Sep 23, 2019 at 11:24 AM <Franz.Rauscher@xxxxxxxxxxx> wrote:
Is there a way to rollback the receiving of a mesage from a dtaq in
case the processing of the message leads to an error. Like the concept
of acknowledgement on other messaging systems.
You can call QRCVDTAQ but not remove the message from the queue.
If there is an error, just leave the entry on the queue. If there is no
error then call QRCVDTAQ again and remove the entry. I *think* you will get
the same queue entry the next time you read the queue if you don't remove it
(someone check me on this, I'm really not sure).
Another option is to put the entry back on the queue if there is an error.
david
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