I reckon this should be passed on to the user. At the end of the day when we talk about 'users' in this context, it is not end-users who write Java applications, but rather developers who implement frameworks such as Tomcat session clustering (a.k.a. Brian :) ) A separate method call will just add clutter. If PojoCache needs to be aware of a data gravitation (so it can gravitate internal space as well) then it should sniff for the option being present in the Invocation Context. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3958359#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...