Define persistence context and entity manager in JPA?

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jjadmin
Define persistence context and entity manager in JPA?

According to JPA specification, a persistence context is a set of managed entity instances. 

Entities are thus managed within a persistence context.

The EntityManager controls the lifecycle of the entities, and these entities can access data store resources.

When a persistence context ends, previously-managed entities become detached. A detached entity is no longer under the control of the EntityManager, and no longer has access to datastore resources.

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