On 1/29/07 9:31 PM, "igah" <[EMAIL PROTECTED]> wrote: > > hi there, > > it's easy to load balance a queue's consumers -- by starting multiple > consumer threads (in the same or different processes). but how to do this > for a subscriber. > > let me explain what I mean with a use case like this: a message is published > to a topic, where there are two subscribers, each of which does something > different. let's say one subscriber's message processing rate is slower than > the message arrival rate. it's natural to start multiple of them to > distribute the load. but you cannot start another identical instance of the > subscriber because that would cause the same message to be processed twice.
I believe that JMS flow control can prevent this from occurring. The publisher will not send the next message until all subscribers have consumed it. > > i can think of one solution where i create another queue and forward all the > messages from the topic to the queue. then we can start as many consumers on > that queue as we want to. this requires management of this "forwarder". (you > need to make sure it's always up, etc.) > > is there a better or more "out-of-box" approach? > > thanks in advance. -- Daryl http://itsallsemantics.com "I¹m afraid of the easy stuff its always harder than it seems" -- Bill Hampton, 2006
