Are you talking of something where you dont' wish to use the Infinispan caches which comes along with AS7 and want only a external store?
As I said, it can be anything. Right now I can leverage local Infinispan cache and in future, I want to extend that to use a remote cache.
Please let me know if you need more information. And, let me know if there is a way in JBoss 7 to do this.
You can configure the relevant cache in the web cache container to use a shared <remote-store/> with passivation and purge disabled (such that all sessions will be stored in the remote cache). The sessions will still be held in memory, however. Direct usage of a remote cache access is not implemented in AS7.