Java Persistence with Hibernate

9.3. The Hibernate interfaces

Any transparent persistence tool includes a persistence manager API. This persistence manager usually provides services for the following:

• Basic CRUD (create, retrieve, update, delete) operations

• Query execution

• Control of transactions

• Management of the persistence context

The persistence manager may be exposed by several different interfaces. In the case of Hibernate, these are Session, Query, Criteria, and Transaction. Under the covers, the implementations of these interfaces are coupled tightly together.

In Java Persistence, the main interface you interact with is the EntityManager; it has the same role as the Hibernate Session. Other Java Persistence interfaces are Query and EntityTransaction (you can probably ...