org.springframework.orm.jpa

Class ExtendedEntityManagerCreator

java.lang.Object

org.springframework.orm.jpa.ExtendedEntityManagerCreator

public abstract class ExtendedEntityManagerCreator
extends Object

Delegate for creating a variety of EntityManager proxies that follow the JPA spec's semantics for "extended" EntityManagers.

Supports several different variants of "extended" EntityManagers: in particular, an "application-managed extended EntityManager", as defined by EntityManagerFactory.createEntityManager(), as well as a "container-managed extended EntityManager", as defined by PersistenceContextType.EXTENDED.

The original difference between "application-managed" and "container-managed" was the need for explicit joining of an externally managed transaction through the EntityManager.joinTransaction() method in the "application" case versus the automatic joining on each user-level EntityManager operation in the "container" case. As of JPA 2.1, both join modes are available with both kinds of EntityManagers, so the difference between "application-" and "container-managed" is now primarily in the join mode default and in the restricted lifecycle of a container-managed EntityManager (i.e. tied to the object that it is injected into).

Since:

2.0

Author:

Juergen Hoeller, Rod Johnson, Mark Paluch

See Also:

EntityManagerFactory.createEntityManager(), PersistenceContextType.EXTENDED, EntityManager.joinTransaction(), SharedEntityManagerCreator

Constructor Summary

Constructors

Constructor and Description
ExtendedEntityManagerCreator()

Method Summary

Modifier and Type	Method and Description
static EntityManager	createApplicationManagedEntityManager(EntityManager rawEntityManager, EntityManagerFactoryInfo emfInfo) Create an application-managed extended EntityManager proxy.
static EntityManager	createApplicationManagedEntityManager(EntityManager rawEntityManager, EntityManagerFactoryInfo emfInfo, boolean synchronizedWithTransaction) Create an application-managed extended EntityManager proxy.
static EntityManager	createContainerManagedEntityManager(EntityManager rawEntityManager, EntityManagerFactoryInfo emfInfo) Create a container-managed extended EntityManager proxy.
static EntityManager	createContainerManagedEntityManager(EntityManagerFactory emf) Create a container-managed extended EntityManager proxy.
static EntityManager	createContainerManagedEntityManager(EntityManagerFactory emf, Map<?,?> properties) Create a container-managed extended EntityManager proxy.
static EntityManager	createContainerManagedEntityManager(EntityManagerFactory emf, Map<?,?> properties, boolean synchronizedWithTransaction) Create a container-managed extended EntityManager proxy.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExtendedEntityManagerCreator

public ExtendedEntityManagerCreator()

Method Detail

createApplicationManagedEntityManager

public static EntityManager createApplicationManagedEntityManager(EntityManager rawEntityManager,
                                                                  EntityManagerFactoryInfo emfInfo)

Create an application-managed extended EntityManager proxy.

Parameters:

rawEntityManager - the raw EntityManager to decorate

emfInfo - the EntityManagerFactoryInfo to obtain the JpaDialect and PersistenceUnitInfo from

Returns:

an application-managed EntityManager that can join transactions but does not participate in them automatically

createApplicationManagedEntityManager

public static EntityManager createApplicationManagedEntityManager(EntityManager rawEntityManager,
                                                                  EntityManagerFactoryInfo emfInfo,
                                                                  boolean synchronizedWithTransaction)

Create an application-managed extended EntityManager proxy.

Parameters:

rawEntityManager - the raw EntityManager to decorate

emfInfo - the EntityManagerFactoryInfo to obtain the JpaDialect and PersistenceUnitInfo from

synchronizedWithTransaction - whether to automatically join ongoing transactions (according to the JPA 2.1 SynchronizationType rules)

Returns:

an application-managed EntityManager that can join transactions but does not participate in them automatically

Since:

4.0

createContainerManagedEntityManager

public static EntityManager createContainerManagedEntityManager(EntityManager rawEntityManager,
                                                                EntityManagerFactoryInfo emfInfo)

Create a container-managed extended EntityManager proxy.

Parameters:

rawEntityManager - the raw EntityManager to decorate

emfInfo - the EntityManagerFactoryInfo to obtain the JpaDialect and PersistenceUnitInfo from

Returns:

a container-managed EntityManager that will automatically participate in any managed transaction

createContainerManagedEntityManager

public static EntityManager createContainerManagedEntityManager(EntityManagerFactory emf)

Create a container-managed extended EntityManager proxy.

Parameters:

emf - the EntityManagerFactory to create the EntityManager with. If this implements the EntityManagerFactoryInfo interface, the corresponding JpaDialect and PersistenceUnitInfo will be detected accordingly.

Returns:

a container-managed EntityManager that will automatically participate in any managed transaction

See Also:

EntityManagerFactory.createEntityManager()

createContainerManagedEntityManager

public static EntityManager createContainerManagedEntityManager(EntityManagerFactory emf,
                                                                @Nullable
                                                                Map<?,?> properties)

Create a container-managed extended EntityManager proxy.

Parameters:

emf - the EntityManagerFactory to create the EntityManager with. If this implements the EntityManagerFactoryInfo interface, the corresponding JpaDialect and PersistenceUnitInfo will be detected accordingly.

properties - the properties to be passed into the createEntityManager call (may be null)

Returns:

a container-managed EntityManager that will automatically participate in any managed transaction

See Also:

EntityManagerFactory.createEntityManager(java.util.Map)

createContainerManagedEntityManager

public static EntityManager createContainerManagedEntityManager(EntityManagerFactory emf,
                                                                @Nullable
                                                                Map<?,?> properties,
                                                                boolean synchronizedWithTransaction)

Create a container-managed extended EntityManager proxy.

Parameters:

emf - the EntityManagerFactory to create the EntityManager with. If this implements the EntityManagerFactoryInfo interface, the corresponding JpaDialect and PersistenceUnitInfo will be detected accordingly.

properties - the properties to be passed into the createEntityManager call (may be null)

synchronizedWithTransaction - whether to automatically join ongoing transactions (according to the JPA 2.1 SynchronizationType rules)

Returns:

a container-managed EntityManager that expects container-driven lifecycle management but may opt out of automatic transaction synchronization

Since:

4.0

See Also:

EntityManagerFactory.createEntityManager(java.util.Map)