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198 words

javax.persistence.PersistenceContext - JPA annotation

javax.persistence
Annotation PersistenceContext

Target:
Classes and fields (including property get methods)
Expresses a dependency on a container-managed EntityManager and its associated persistence context.
Since:
JPA 1.0
String name
(Optional) The name by which the entity manager is to be accessed in the environment referencing context; not needed when dependency injection is used.
(Optional) The name by which the entity manager is to be accessed in the environment referencing context; not needed when dependency injection is used.
Default value:
""
Since:
JPA 1.0
PersistenceProperty[] properties
(Optional) Properties for the container or persistence provider.
(Optional) Properties for the container or persistence provider. Vendor specific properties may be included in this set of properties. Properties that are not recognized by a vendor are ignored.
Default value:
{}
Since:
JPA 1.0
PersistenceContextType type
(Optional) Specifies whether a transaction-scoped persistence context or an extended persistence context is to be used.
(Optional) Specifies whether a transaction-scoped persistence context or an extended persistence context is to be used.
Default value:
javax.persistence.PersistenceContextType.TRANSACTION
Since:
JPA 1.0
String unitName
(Optional) The name of the persistence unit as defined in the persistence.xml file.
(Optional) The name of the persistence unit as defined in the persistence.xml file. If the unitName element is specified, the persistence unit for the entity manager that is accessible in JNDI must have the same name.
Default value:
""
Since:
JPA 1.0
This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
Object DB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.