...one thing that came into my mind just now is, that - when using a SOA/ESB - the thread that executes the workflow (the generic ActionHandler you mentioned) is blocked until the response of the service is received. In the proposal that I made, all threads continue their work, which is a great advantage for me. Tell me if I'm wrong - I'm not familiar with ESBs (yet). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961227#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...