For samples, documentation, and usage information, please see http://ehcache.github.io.
We released the Milestone 2 on August 11, 2015. In addition to the JSR-107 compatibility, it introduces up to 3 level tiering, offering offheap as well as a new disk persistence option; write-behind, …
The release notes contain the links to the documentation to help you get started
We are now working on the next milestone : All missing features from the existing Ehcache 2.x line, exposed using the new API, but Automatic Resource Control (planned for M4).
See the milestones on GitHub for more details on the current status.