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Java Source Code / Java Documentation » J2EE » spring framework 2.5 » org.springframework.orm.jpa 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.springframework.orm.jpa.EntityManagerFactoryUtils

EntityManagerFactoryUtils
abstract public class EntityManagerFactoryUtils (Code)
Helper class featuring methods for JPA EntityManager handling, allowing for reuse of EntityManager instances within transactions. Also provides support for exception translation.

Mainly intended for internal use within the framework.
author:
   Juergen Hoeller
since:
   2.0



Field Summary
final public static  intENTITY_MANAGER_SYNCHRONIZATION_ORDER
     Order value for TransactionSynchronization objects that clean up JPA EntityManagers.


Method Summary
public static  DataAccessExceptionconvertJpaAccessExceptionIfPossible(RuntimeException ex)
     Convert the given runtime exception to an appropriate exception from the org.springframework.dao hierarchy. Return null if no translation is appropriate: any other exception may have resulted from user code, and should not be translated.

The most important cases like object not found or optimistic locking failure are covered here.

public static  EntityManagerdoGetTransactionalEntityManager(EntityManagerFactory emf, Map properties)
     Obtain a JPA EntityManager from the given factory.
public static  EntityManagerFactoryfindEntityManagerFactory(ListableBeanFactory beanFactory, String unitName)
     Find an EntityManagerFactory with the given name in the given Spring application context (represented as ListableBeanFactory).

The specified unit name will be matched against the configured peristence unit, provided that a discovered EntityManagerFactory implements the EntityManagerFactoryInfo interface.

public static  EntityManagergetTransactionalEntityManager(EntityManagerFactory emf)
     Obtain a JPA EntityManager from the given factory.
public static  EntityManagergetTransactionalEntityManager(EntityManagerFactory emf, Map properties)
     Obtain a JPA EntityManager from the given factory.

Field Detail
ENTITY_MANAGER_SYNCHRONIZATION_ORDER
final public static int ENTITY_MANAGER_SYNCHRONIZATION_ORDER(Code)
Order value for TransactionSynchronization objects that clean up JPA EntityManagers. Return DataSourceUtils.CONNECTION_SYNCHRONIZATION_ORDER - 100 to execute EntityManager cleanup before JDBC Connection cleanup, if any.
See Also:   org.springframework.jdbc.datasource.DataSourceUtils.CONNECTION_SYNCHRONIZATION_ORDER





Method Detail
convertJpaAccessExceptionIfPossible
public static DataAccessException convertJpaAccessExceptionIfPossible(RuntimeException ex)(Code)
Convert the given runtime exception to an appropriate exception from the org.springframework.dao hierarchy. Return null if no translation is appropriate: any other exception may have resulted from user code, and should not be translated.

The most important cases like object not found or optimistic locking failure are covered here. For more fine-granular conversion, JpaAccessor and JpaTransactionManager support sophisticated translation of exceptions via a JpaDialect.
Parameters:
  ex - runtime exception that occured the corresponding DataAccessException instance,or null if the exception should not be translated




doGetTransactionalEntityManager
public static EntityManager doGetTransactionalEntityManager(EntityManagerFactory emf, Map properties) throws PersistenceException(Code)
Obtain a JPA EntityManager from the given factory. Is aware of a corresponding EntityManager bound to the current thread, for example when using JpaTransactionManager.

Same as getEntityManager, but throwing the original PersistenceException.
Parameters:
  emf - EntityManagerFactory to create the EntityManager with
Parameters:
  properties - the properties to be passed into the createEntityManagercall (may be null) the EntityManager, or null if none found
throws:
  javax.persistence.PersistenceException - if the EntityManager couldn't be created
See Also:   EntityManagerFactoryUtils.getTransactionalEntityManager(javax.persistence.EntityManagerFactory)
See Also:   JpaTransactionManager




findEntityManagerFactory
public static EntityManagerFactory findEntityManagerFactory(ListableBeanFactory beanFactory, String unitName) throws NoSuchBeanDefinitionException(Code)
Find an EntityManagerFactory with the given name in the given Spring application context (represented as ListableBeanFactory).

The specified unit name will be matched against the configured peristence unit, provided that a discovered EntityManagerFactory implements the EntityManagerFactoryInfo interface. If not, the persistence unit name will be matched against the Spring bean name, assuming that the EntityManagerFactory bean names follow that convention.
Parameters:
  beanFactory - the ListableBeanFactory to search
Parameters:
  unitName - the name of the persistence unit (never empty) the EntityManagerFactory
throws:
  NoSuchBeanDefinitionException - if there is no such EntityManagerFactory in the context
See Also:   EntityManagerFactoryInfo.getPersistenceUnitName




getTransactionalEntityManager
public static EntityManager getTransactionalEntityManager(EntityManagerFactory emf) throws DataAccessResourceFailureException(Code)
Obtain a JPA EntityManager from the given factory. Is aware of a corresponding EntityManager bound to the current thread, for example when using JpaTransactionManager.

Note: Will return null if no thread-bound EntityManager found!
Parameters:
  emf - EntityManagerFactory to create the EntityManager with the EntityManager, or null if none found
throws:
  DataAccessResourceFailureException - if the EntityManager couldn't be obtained
See Also:   JpaTransactionManager




getTransactionalEntityManager
public static EntityManager getTransactionalEntityManager(EntityManagerFactory emf, Map properties) throws DataAccessResourceFailureException(Code)
Obtain a JPA EntityManager from the given factory. Is aware of a corresponding EntityManager bound to the current thread, for example when using JpaTransactionManager.

Note: Will return null if no thread-bound EntityManager found!
Parameters:
  emf - EntityManagerFactory to create the EntityManager with
Parameters:
  properties - the properties to be passed into the createEntityManagercall (may be null) the EntityManager, or null if none found
throws:
  DataAccessResourceFailureException - if the EntityManager couldn't be obtained
See Also:   JpaTransactionManager




Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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