Persistence Unit ...

Vassili Vladimir

Ranch Hand

Posts: 1585

posted 16 years ago

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Hi,

Can somebody please explain what a Persistence Unit actually is ?

Thanks ...

Vassili ...
SCJP 5.0, SCWCD 1.4, SCJA 1.0

Adam Tkaczyk

Greenhorn

Posts: 21

posted 16 years ago

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JSR 220 explains this very clearly.

A persistence unit is a logical grouping that includes:
� An entity manager factory and its entity managers, together with their configuration information.
� The set of managed classes included in the persistence unit and managed by the entity managers
of the entity manager factory.
� Mapping metadata (in the form of metadata annotations and/or XML metadata) that specifies the mapping of the classes to the database.

SCJP5

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