NoSQL Document-oriented in-memory database written in Java

Question

The goals are:

• Open source
• Written in Java
• Available as a Jar file
• Should not need the installation or configuration of a server or a client
• Be document-oriented as MongoDB, CouchDB, etc.
• Work as in-memory database
• Available in Maven

Hazelcast works like that, but it's not document-oriented.

Do you know any NoSQL database with that description?

Answer 1

Finally I found it. It uses Cassandra as an in-memory embedded server. The libraries are written on Java and they are available on Maven.

https://github.com/doanduyhai/Achilles/wiki/CQL-embedded-cassandra-server