Major Description
Database management is sensitive since unclosed resources can cause slow resource leaks which can be difficult to troubleshoot. Inverse of control is a technique which makes DB access a little unusual, but completely solves this problem, and also ensures proper and consistent error handling.
Transactions are usual so units of work can be grouper together and they can commit or rollback atomically.
Both are added to grouper.
https://wiki.internet2.edu/confluence/display/GrouperWG/Hibernate+and+data+layer+updates