JCache (as a spec) does not define support for integrating with transactions - so why/how do you expect JCache to work via transactional access?

For Ehcache, yes previous versions did in fact "support" transactional access - however, I believe this was not really transactional (integrated with JTA). Henri Tremblay, Alex Snaps can you guys confirm this? Regardless, seeing as how it was there before we could certainly add it back (within the normal caveat that neither hibernate-ehcache nor Ehcache 2.0 itself are supported any more).