Version 2.0
Version 2.0 jumps straight from version 1.0 with significant changes.
OPDPFObjectFactory now returns OPartitionedDatabasePoolFactory which provides fast, lock-free database pools, making this a scalable solution.
OdbSessionListener has been removed as it is no longer needed.
OdbFilter has also been removed, as it was a solution to a rather narrow problem that should generally be solved in application-specific code.
The odbresource-2.0.zip files includes version 2.2.0-beta of OrientDB, but the realm and factory should work with versions 2.0 and above.
Find the API documentation here.
Find the discussion of the purpose behind this project here. Although some of this is now redundant.