At some level we should align with the java.util.concurrent.Executor/ExecutorService/Future/CompletionService/ as a simple api for asynchronous invocations. This still applies to the invocation based model. I view what Tim is asking for as more of an expansion of the transport channel abstraction spi that essentially allows for more interception of raw transport packets. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3971428#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...