实现O / RM系统（Hibernate）的长期历史模式的最佳实践？

I have mapped several java classes like Customer, Assessment, Rating, ... to a database with Hibernate. Now i am thinking about a history-mode for all changes to the persistent data. The application is a web application. In case of deleting (or editing) data another user should have the possibility to see the changes and undo it. Since the changes are out of the scope of the current session, i don't know how to solve this in something like the Command pattern, which is recommended for undo functionality.I have mapped several java classes like Custome