Java DB for Configuration Properties
Edmon writes about his use of Java DB for persisting configuration properties used in Java EE:
Instead of using xml files for configuration properties I now use Java DB (previously know as Apache Derby) for the storage of configuration properties.
Java DB is a fully functional, yet small,
Java-based relational database.
It comes with Java 6 SE and it can be found (on Windows) under C:\Program Files\Sun\JavaDB.
It by default listens on port 1527, but it can be ran in a fully embedded mode as well.