Implement a provider for Spring's Cache Abstraction

As described on http://blog.springsource.com/2011/02/23/spring-3-1-m1-caching/ , Spring is now providing some integration helpers to a caching interface; it seems easy to implement.

there are many possible issues using this the wrong way, we should especially warn about not caching JPA entities this way.
See topic "Spring Cache Abstraction " here: http://lists.jboss.org/pipermail/hibernate-dev/2011-February/thread.html#6016