Hawkular uses ActiveMQ for JMS. I learned earlier this week that ActiveMQ implements JMS 1.1 but not 2.0 which has been out for some time and is in WildFly 9. JMS 2.0 has some nice changes including async sending of messages. In JMS 1.1 the client blocks until the server acknowledges successful delivery of the message. In 2.0 the sender can receive that acknowledgement asynchronously via a callback.
HornetQ is the default JMS provider in WildFly 8/9. If I am not mistaken part of the reason to go with ActiveMQ was due to the uncertainty around the future of HornetQ. HornetQ is now ActiveMQ Artemis[1] and will be the JMS provider in WlidFly 10haw. It does not look like ActiveMQ will implement JMS 2.0 any time soon which again, has been out for some time. Can/should we consider switching to HornetQ/Artemis?
- John