Are you using FKache? Let us know by sending us a mail and we'll add you project in the references section of this site. FKache was originally supposed to be an open source implementation of jsr-107. This project will now move to a new direction, independently of jsr-107, until something eventually is released. The aim for fkache is to be a feature-rich, super-fast caching. The direction change will be done in several iterations, so you get a chance to change your code. For each iteration, all methods/classes/packages changed or removed is deprecated. So you only need to find all deprecated methods/classes in FKache, and replace them with the proposed replacement. If the deprecation is marked with "no replacement", and you are using that feature, please contact the main developer to see if a solution can be made available.