BTW we support optional total ordering to ensure that all consumers on a topic see the same order (which is slower as we have to synchronize the processing of the processors in the broker)
On 3/19/07, James Strachan <[EMAIL PROTECTED]> wrote:
ActiveMQ supports ordering of a single producers messages; so the only way to get things to arrive out of order is to have multipe producers and get the messages to interleaved. i.e. so for producers M and N, one consumer might see M1, M2, N1, N2 the other might see M1, N1, M2, N2 etc On 3/19/07, Allesmallachen <[EMAIL PROTECTED]> wrote: > > Hi, > the JMS specification says that "JMS does not define order of message > receipt across destinations". The documentation on the websites only > describes ordering issues with mutiple sessions or mutiple producers. But > what about one producer and several consumers with different topics? > > I've tried to get the ActiveMQ to make mistakes that show that there is no > ordering across destinations. I have two TopicSubscribers with two different > Topics (one nomal "m", one temporary "x") under same session and one > TopicPublisher under a different session that publishes messages to the two > different topics in a separate Thread. To make this a little bit more > challeging for the ActiveMQ I've also added a few other consumers for topic > m. > > However no matter how many message I send, all are received in the correct > order also accross destinations. For exampe if the publisher sends > m1;m2;x1;m3;x2 ... then m1 to m3 are received by the subscriber to m and > then afterwards x1 is received by the subscriber to x and so on. Everything > in perfect order. > > I know that a session is a single threaded context and therefore it is clear > to me that the consumer's onMessage methods will be called in order if the > messages arrive in order. However, does this mean that ActiveMQ supports > ordering across destinations or is my TestCase just too simply to force > mistakes? > > Best regards, > Christian > -- > View this message in context: http://www.nabble.com/Order-of-message-consumption-across-destinations-tf3425028s2354.html#a9546365 > Sent from the ActiveMQ - User mailing list archive at Nabble.com. > > -- James ------- http://radio.weblogs.com/0112098/
-- James ------- http://radio.weblogs.com/0112098/
