Already Hibernate injects a specialized TM lookup into the TreeCache when it is used as the second level cache. So another (cleaner?) solution would be to have JBC delegate registration of its Synchronization(s) to the TM lookup. Hibernate could then intercept those calls and deal with the JBC synch in an appropriate manner to ensure the proper ordering. I assume your ordering is simply registration order? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3993843#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...