Xydra is a generic, embedabble application data model that runs seamlessly in Java (makes testing easy), on Google AppEngine (GAE/J), and also via Google Web Toolkit (GWT) as JavaScript in a browser.
Features:
* Persistence (currently: in-memory, in GAE data store)
* Events (for all added, removed, or changed entites)
* Commands (which can be serialized, too)
* Transactions (over as many entities as you like)
* Versioning (including a full change log)
* Access Rights Management (with powerful resources hierarchies and nested user groups)
* Synchronisation of stat between client and server (in strict or relaxed mode)
Commercial Use
Modify
Distribute
Place Warranty
Hold Liable
Use Trademarks
Include Copyright
Include License
These details are provided for information only. No information here is legal advice and should not be used as such.