Thanks for replying. Here is my usecase:
consume a message from the queue. Do some transformation on the messge.
Then, persist the transformed message to datastore.
Once, transformed message is written to datastore, send ack. Reason i want
to send ack later is, in case my application goes down post message
consumption and before writing to datastore, i should be able to fetch same
message again from JMS queue. Hope that clarifies.
Thanks!
On Sat, Dec 21, 2013 at 9:14 PM, kraythe . <kray...@gmail.com> wrote:
> I don't think the question is quite clear. In JMS you can only consume a
> message off a queue once. You can't consume it and leave it on the queue.
> Why do want to not ack the message? Queues are like throwing candy into a
> room of kindergarten children. All will scramble for the candy but each
> piece will get consumed by only one child. The only time JMS messages
> aren't caked is when they are failed in delivery. And even then, the only
> use case for leaving them on the queue is because of a failed transaction
> in a transactional route,
>
> Tell me what is the use case you are trying to implement and I might be
> able to help you down another path.
>
> On Saturday, December 21, 2013, Tarun Kumar wrote:
>
> > Hi,
> >
> > Any help here will be highly appreciated.
> >
> >
> > On Fri, Dec 20, 2013 at 9:55 AM, Tarun Kumar <agrawal.taru...@gmail.com
> <javascript:;>
> > >wrote:
> >
> > > I am using polling consumer.
> > >
> > > from("timer://foo?period=5000").bean(cool, "someBusinessLogic");
> > >
> > > public static class MyCoolBean {
> > >
> > > private ConsumerTemplate consumer;
> > >
> > > public void setConsumer(ConsumerTemplate consumer) {
> > > this.consumer = consumer;
> > > }
> > >
> > > public void someBusinessLogic() {
> > >
> > > Exchange exchange
> > > =
> >
> consumer.receive("catalogJms:queue:queueName?mapJmsMessage=false&acknowledgementModeName=CLIENT_ACKNOWLEDGE");
> > >
> > > }
> > >
> > >
> > > Even though i am not sending acknowledgement for received message, each
> > > time it is polling different message. Any idea why that's happening?
> > >
> >
>
>
> --
> *Robert Simmons Jr. MSc. - Lead Java Architect @ EA*
> *Author of: Hardcore Java (2003) and Maintainable Java (2012)*
> *LinkedIn: **http://www.linkedin.com/pub/robert-simmons/40/852/a39
> <http://www.linkedin.com/pub/robert-simmons/40/852/a39>*
>
