"weston.price(a)jboss.com" wrote : JCA is an 'enabling' technology, not a platform in and of itself. An ESB, as I understand it, provides a higher set of services (ie routing, rules, transformations etc). Again, I could be wrong on this being that the definition of an ESB is a bit hard to pin down. Yes, JCA is another mechanism to enable the inflow/outflow of messages albeit an extremely useful one ;-). It is the ESB's responsibility to handle the routing of messages to other services. JMS is just another transport mechanism which could be used in the routing of the messages. At present the code exposes too much of the transport details to the busines logic but this will change in 5. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4038067#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...