MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap memory. It is a fast, scalable and easy to use embedded Java database.
'org.mapdb:mapdb:2.0-beta8'
<dependency>
<groupId>org.mapdb</groupId>
<artifactId>mapdb</artifactId>
<version>2.0-beta8</version>
</dependency>
<dependency org="org.mapdb" name="mapdb" rev="2.0-beta8"/>
"org.mapdb", "mapdb", "2.0-beta8"