Hi Claus, thanks for clarifying this!
Kind regards, Jörn On Wed, Sep 10, 2014 at 12:18 PM, Claus Ibsen <[email protected]> wrote: > Hi > > Yeah you can configure the broker to move the message to a DLQ. Often > the broker has a way of doing that. As the broker knows how many times > a message has been redeliveried etc. > > On the JMS spec / JMS message all Camel would know is that a message > is redelivered or not, there is a only a boolean > > http://docs.oracle.com/javaee/6/api/javax/jms/Message.html#getJMSRedelivered() > > So sometimes you can find a counter also in the JMSX headers which is > broker specific. So you may be able to grab the counter and handle the > move to DLQ from Camel also. > > On Wed, Sep 10, 2014 at 8:47 AM, Jörn Gersdorf <[email protected]> wrote: > > Hi camel experts, > > > > we have a problem with redeliveries/exception handling when an exception > > occurs within the JPA commit/flush at transaction end. > > > > In a camel route we are using JMS on the receiving side and JPA on the > sink > > side. Transaction management is performed using JTA. > > > > <route id="myroute"> > > <from uri="jms:input.queue"/> > > <transacted /> > > <to uri="bean:mybean?method=persist"/> > > </route> > > > > Within the bean JPA is used to persist some objects. > > > > Now, in case we persist something which will lead to a Unique Constraint > > Violation this will happen only at transaction commit time (maybe in the > > JPA flush performed as part of that commit). This will lead to a rollback > > both on JPA as well as on JMS side (which is okay and required). > > > > Now, JMS will try to redeliver the message, which will lead to a loop. > > > > How is this in general handled in the camel world? Is there a way - or is > > the only way to configure our JMS provider to move failing messages > finally > > to a dead letter queue? > > > > Thank you. > > > > Kind regards, > > Jörn > > > > -- > Claus Ibsen > ----------------- > Red Hat, Inc. > Email: [email protected] > Twitter: davsclaus > Blog: http://davsclaus.com > Author of Camel in Action: http://www.manning.com/ibsen > hawtio: http://hawt.io/ > fabric8: http://fabric8.io/ >
