Is there any progress on message prioritization? This could be a deal-breaker for using ActiveMQ..
Hiram Chirino wrote: > > HI Attila, > > Your right on all counts. Something like the PriorityQueue should do > the trick but it would need to be done on the PrefetchSubscription's > pending list. The message list of the Queue is not used unless the > Queue is filling a new consumer. > > The hard part in implementing this is making supporting priority a > configurable policy option configured via activemq.xml. Supporting > priority adds overhead that most JMS applications do not need to incur > and should be off by default. > > Please submit us a patch if you get this implemented. > > On 5/3/06, Attila_Szegedi <nabb...@szegedi.org> wrote: >> >> What's the current state of the message priority support in ActiveMQ? It >> looks to me like it was in there previously, but is gone again in 4.0 as >> witnessed by AMQ-122 Jira issue... At least from my initial 2-hour >> analysis >> of the latest SVN source code, it looks like there's no prioritization in >> org.apache.activemq.broker.region.Queue (am I looking in the right place >> at >> all?) - it uses a LinkedList for messages. >> >> I was wondering if this would be as easy as replacing the "LinkedList >> messages" member of the Queue class with a PriorityQueue and have >> priority >> stored in MessageReference objects and implement a Compator for the >> priority >> queue on them with lexicographical comparison of (priority, message >> sequence >> number). There's probably an additional gotcha with selector interaction >> (AMQ-337) that I don't know where in the code should it be addressed... >> >> So, my question boils down to: does ActiveMQ 4.0 support message >> prioritization, and if not, how hard would it be to implement? >> -- >> View this message in context: >> http://www.nabble.com/Message-prioritization-t1551775.html#a4215527 >> Sent from the ActiveMQ - User forum at Nabble.com. >> >> > > > -- > Regards, > Hiram > > -- View this message in context: http://www.nabble.com/Message-prioritization-tp4215527p22851769.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
