I see. I will have to look into virtual topics for ActiveMQ then? Or are there other ways to ensure that every route consumes a message on a topic exactly once? I.e. a message is consumed by exactly one (concurrent) consumer?
Is this limitation of the JMS consumer going to be lifted in the nearer future? Thanks! Ralf -----Original Message----- From: Claus Ibsen <[email protected]> Reply-to: [email protected] To: [email protected] Subject: Re: Can't get <camel:threads> to work Date: Wed, 5 Oct 2011 13:05:12 +0200 The JMS consumer forces synchronization due the underlying Spring JMS being used. You should enable concurrent consumers on the JMS endpoint to have multiple consumers with JMS. http://camel.apache.org/jms On Wed, Oct 5, 2011 at 12:16 PM, Ralf Steppacher <[email protected]> wrote: > Hi all, > > I am stuck with what seemed a trivial task: parallel execution of a > route with <camel:threads>. > > I have basically copied the "Example: threads DSL" on > http://camel.apache.org/async.html and tried the same in spring XML. > This is what my route looks like at the moment: > > <camel:route> > <camel:from ref="mq.topic.command" /> > <camel:threads> > <camel:unmarshal> > <camel:serialization /> > </camel:unmarshal> > <camel:log loggingLevel="INFO" message="Received command: > ${in.body}" /> > <delay> > <constant>10000</constant> > </delay> > </camel:threads> > </camel:route> > > There are three commands published simultaneously to the topic > "mq.topic.command" every minute. I expected the three commands to be > logged quasi simsimultaneously due to the parallel processing, but it > seems as if they are processed serially in a single thread: > > 2011-10-05 11:53:00,191 INFO route1 - Received command: Command > [commandType=HARVEST_CLOSES, messageSource=EVENT_EMITTER, > uuid=9497b5a2-8f39-435c-b00a-44135900d9b7, version=null] > 2011-10-05 11:53:10,212 INFO route1 - Received command: Command > [commandType=HARVEST_QUOTES, messageSource=EVENT_EMITTER, > uuid=72018457-fa4b-4d0f-8187-9c7f8dabb0bf, version=null] > 2011-10-05 11:53:20,231 INFO route1 - Received command: Command > [commandType=HARVEST_TRADES, messageSource=EVENT_EMITTER, > uuid=642227f5-0849-43fc-84f9-60233a6023a4, version=null] > > I have tried and tested all combinations of where to put the > <camel:threads> tag, the behavior stays the same. > > I found several examples on the web that put the threads tag on a single > line like this: <camel:threads /> > This is valid according to the schema, but for me start-up of the route > fails because "thread" has no children. > > I spent a little time debugging the ramp-up of the context and can see > an ExecutorService being created. > > What am I missing? > > The behavior is the same with Camel 2.7.2 and 2.8.1. I am running this > on Ubuntu 11.04 (64bit) and Sun JDK 1.6.0_26 (64bit). > > > Thanks! > Ralf >
