Hazzlecast

Hazzlecast enables you to write in memory applications. Imagine that you have an application that is clustered and each instance needs to know about data in other applications without using data bases. This scenario is addressed by hazzlecast. It provides java developers an easy-to-use and powerful solution for data distribution that can be used as a clustering solution, a distributed cache and a NoSQL key-value store.

A simple example on how to use this system is explained in the following link.

http://www.javacodegeeks.com/2013/11/getting-started-with-hazelcast.html