hibernate-envers

The Envers module aims to provide an easy auditing / versioning solution for entity classes.

• Add the hibernate-envers dependency to your classpath.
• Annotate your entity or entity properties with the [@Audited][df1] annotation.

table_AUD suffix

audit table with append _AUD as the suffix of each annotated table which will contains all modification, creation and deletion for tables. Official Document

• rev: revision number. basically, one transaction is one revision. that means rev is global and you can query for various tables at a particular version.
• revtype: revision type. 0: create, 1: modify, 2: delete

PPT