So you want a front-end thread to be blocking for (mostly) parallel executed jobs in the backend? Ar you sure? How long will these jobs be running? Is the process fully ended after these jobs like in your definition that was posted? So basically http://www.eaipatterns.com/BroadcastAggregate.html is what you want? I'd look into using some kind of ajax polling to check if they are finished. And I assume there are multiple return variables since having multiple parallel jobs working on the same variable is kind of dangerous. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4255500#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...