java.lang.Object
- org.springframework.orm.jpa.SharedEntityManagerCreator

```
public abstract class SharedEntityManagerCreator
extends Object
```
Delegate for creating a shareable JPA EntityManager reference for a given EntityManagerFactory.
A shared EntityManager will behave just like an EntityManager fetched from an application server's JNDI environment, as defined by the JPA specification. It will delegate all calls to the current transactional EntityManager, if any; otherwise it will fall back to a newly created EntityManager per operation.
For a behavioral definition of such a shared transactional EntityManager, see PersistenceContextType.TRANSACTION and its discussion in the JPA spec document. This is also the default being used for the annotation-based PersistenceContext.type().
Since:
2.0
Author:
Juergen Hoeller, Rod Johnson, Oliver Gierke
See Also:
PersistenceContext, PersistenceContextType.TRANSACTION, JpaTransactionManager, ExtendedEntityManagerCreator

Constructor Summary
Constructors
Constructor Description
SharedEntityManagerCreator()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static EntityManager`	`createSharedEntityManager(EntityManagerFactory emf)`	Create a transactional EntityManager proxy for the given EntityManagerFactory.
`static EntityManager`	`createSharedEntityManager(EntityManagerFactory emf, Map<?,?> properties)`	Create a transactional EntityManager proxy for the given EntityManagerFactory.
`static EntityManager`	`createSharedEntityManager(EntityManagerFactory emf, Map<?,?> properties, boolean synchronizedWithTransaction)`	Create a transactional EntityManager proxy for the given EntityManagerFactory.
`static EntityManager`	`createSharedEntityManager(EntityManagerFactory emf, Map<?,?> properties, boolean synchronizedWithTransaction, Class<?>... entityManagerInterfaces)`	Create a transactional EntityManager proxy for the given EntityManagerFactory.
`static EntityManager`	`createSharedEntityManager(EntityManagerFactory emf, Map<?,?> properties, Class<?>... entityManagerInterfaces)`	Create a transactional EntityManager proxy for the given EntityManagerFactory.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SharedEntityManagerCreator
```
public SharedEntityManagerCreator()
```
- Method Detail
  - createSharedEntityManager
```
public static EntityManager createSharedEntityManager(EntityManagerFactory emf)
```
    Create a transactional EntityManager proxy for the given EntityManagerFactory.
    Parameters:
    emf - the EntityManagerFactory to delegate to.
    Returns:
    a shareable transaction EntityManager proxy
  - createSharedEntityManager
```
public static EntityManager createSharedEntityManager(EntityManagerFactory emf,
                                                      Map<?,?> properties)
```
    Create a transactional EntityManager proxy for the given EntityManagerFactory.
    Parameters:
    emf - the EntityManagerFactory to delegate to.
    properties - the properties to be passed into the createEntityManager call (may be null)
    Returns:
    a shareable transaction EntityManager proxy
  - createSharedEntityManager
```
public static EntityManager createSharedEntityManager(EntityManagerFactory emf,
                                                      Map<?,?> properties,
                                                      boolean synchronizedWithTransaction)
```
    Create a transactional EntityManager proxy for the given EntityManagerFactory.
    Parameters:
    emf - the EntityManagerFactory to delegate to.
    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 shareable transaction EntityManager proxy
    Since:
    4.0
  - createSharedEntityManager
```
public static EntityManager createSharedEntityManager(EntityManagerFactory emf,
                                                      Map<?,?> properties,
                                                      Class<?>... entityManagerInterfaces)
```
    Create a transactional EntityManager proxy for the given EntityManagerFactory.
    Parameters:
    emf - the EntityManagerFactory to obtain EntityManagers from as needed
    properties - the properties to be passed into the createEntityManager call (may be null)
    entityManagerInterfaces - the interfaces to be implemented by the EntityManager. Allows the addition or specification of proprietary interfaces.
    Returns:
    a shareable transactional EntityManager proxy
  - createSharedEntityManager
```
public static EntityManager createSharedEntityManager(EntityManagerFactory emf,
                                                      Map<?,?> properties,
                                                      boolean synchronizedWithTransaction,
                                                      Class<?>... entityManagerInterfaces)
```
    Create a transactional EntityManager proxy for the given EntityManagerFactory.
    Parameters:
    emf - the EntityManagerFactory to obtain EntityManagers from as needed
    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)
    entityManagerInterfaces - the interfaces to be implemented by the EntityManager. Allows the addition or specification of proprietary interfaces.
    Returns:
    a shareable transactional EntityManager proxy
    Since:
    4.0

Class SharedEntityManagerCreator

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

SharedEntityManagerCreator

Method Detail

createSharedEntityManager

createSharedEntityManager

createSharedEntityManager

createSharedEntityManager

createSharedEntityManager