00:58 why is integration and messaging important 2:37 why MOM (Message-oriented middleware) 2:42 robustness to change 3:50 what is ActiveMQ 4:36 Messaging basics 4:42 message channel 5:34 example of message channel 6:07 point-to-point channel - 6:13 *not every consumer gets the same message* 6:33 publish/subscribe channel 6:46 message counting: selectors 9:10 message groups 9:45 *demo of message groups code*