For samples, documentation, and usage information, please see http://ehcache.org.
We released the Milestone 4 on November 23rd, 2015. In addition to JSR-107 compatibility, 3 level tiering - including offheap and disk persistence options - write-behind, XA transactional caches and making custom serialization possible this milestone includes OSGi readiness and improved exception handling coming from user provided types.
The release notes contain the links to the documentation to help you get started
We are now working on the next milestone, aka Milestone 5 : We expect the next milestone to wrap up unclustered features and have some performance oriented improvements.
See the milestones on GitHub for more details on the current status.