[jboss-as7-dev] A simple timed cache?

I have a couple of tasks that are going to need some form of cache with items to be removed after after a specified timeout, for the API I just need something that implements the Map interface or similar. I don't really want to be bringing in additional dependencies but wanted to check do we have anything similar already in AS7 so I am not re-inventing this for the sake of it. Regards, Darran Lofthouse.