Awesome
datanucleus-typeconverter-kryo
Kryo Serialisation TypeConverter support for DataNucleus
This provides a DataNucleus TypeConverter plugin for serialising a field using the Kryo library (and additionally applying Base64 encoding). Look at <a href="https://github.com/datanucleus/type-converter-kryo/blob/master/src/main/java/org/datanucleus/store/types/kryo/converters/KryoSerialiseStringConverter.java">KryoSerialiseStringConverter.java</a> for more information, as well as plugin.xml and MANIFEST.MF.