How to integrate Cumulus4j into your application is documented on the Usage page.
A theoretic explanation how Cumulus4j works can be found on the Theory page.
You want to lend a hand and help developing Cumulus4j? The Development page explains how to start.
On the Integration tests page you can find detailed information about our integration tests.
Cumulus4j uses very fast and highly secure algorithms by default. However, depending on your hardware, you might prefer a different configuration. You can choose from a plethora of supported algorithms.
API documentation is available in the form of Javadoc.
Which version of Cumulus4j is compatible with which version of DataNucleus is documented in the DataNucleus compatibility matrix.
You can find answers to some frequently asked questions here.
What's new in the current Cumulus4j version?