类 EntityManagerFactoryUtils

字段详细资料

• ENTITY_MANAGER_SYNCHRONIZATION_ORDER

  public static final int ENTITY_MANAGER_SYNCHRONIZATION_ORDER

  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.

  另请参阅:

  DataSourceUtils.CONNECTION_SYNCHRONIZATION_ORDER, 常量字段值

构造器详细资料

• EntityManagerFactoryUtils

  public EntityManagerFactoryUtils()

方法详细资料

• findEntityManagerFactory

  public static EntityManagerFactory findEntityManagerFactory​(ListableBeanFactory beanFactory,
                                                              String unitName)
                                                       throws NoSuchBeanDefinitionException

  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 persistence 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.

  If no unit name has been given, this method will search for a default EntityManagerFactory through BeanFactory.getBean(Class).

  参数:

  beanFactory - the ListableBeanFactory to search

  unitName - the name of the persistence unit (may be null or empty, in which case a single bean of type EntityManagerFactory will be searched for)

  返回:

  the EntityManagerFactory

  抛出:

  NoSuchBeanDefinitionException - if there is no such EntityManagerFactory in the context

  另请参阅:

  EntityManagerFactoryInfo.getPersistenceUnitName()

• getTransactionalEntityManager

  public static EntityManager getTransactionalEntityManager​(EntityManagerFactory emf)
                                                     throws DataAccessResourceFailureException

  Obtain a JPA EntityManager from the given factory. Is aware of a corresponding EntityManager bound to the current thread, e.g. when using JpaTransactionManager.

  Note: Will return null if no thread-bound EntityManager found!

  参数:

  emf - the EntityManagerFactory to create the EntityManager with

  返回:

  the EntityManager, or null if none found

  抛出:

  DataAccessResourceFailureException - if the EntityManager couldn't be obtained

  另请参阅:

  JpaTransactionManager

• getTransactionalEntityManager

  public static EntityManager getTransactionalEntityManager​(EntityManagerFactory emf,
                                                            Map<?,​?> properties)
                                                     throws DataAccessResourceFailureException

  Obtain a JPA EntityManager from the given factory. Is aware of a corresponding EntityManager bound to the current thread, e.g. when using JpaTransactionManager.

  Note: Will return null if no thread-bound EntityManager found!

  参数:

  emf - the EntityManagerFactory to create the EntityManager with

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

  返回:

  the EntityManager, or null if none found

  抛出:

  DataAccessResourceFailureException - if the EntityManager couldn't be obtained

  另请参阅:

  JpaTransactionManager

• doGetTransactionalEntityManager

  public static EntityManager doGetTransactionalEntityManager​(EntityManagerFactory emf,
                                                              Map<?,​?> properties)
                                                       throws PersistenceException

  Obtain a JPA EntityManager from the given factory. Is aware of a corresponding EntityManager bound to the current thread, e.g. when using JpaTransactionManager.

  Same as getEntityManager, but throwing the original PersistenceException.

  参数:

  emf - the EntityManagerFactory to create the EntityManager with

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

  返回:

  the EntityManager, or null if none found

  抛出:

  PersistenceException - if the EntityManager couldn't be created

  另请参阅:

  getTransactionalEntityManager(javax.persistence.EntityManagerFactory), JpaTransactionManager

• doGetTransactionalEntityManager

  public static EntityManager doGetTransactionalEntityManager​(EntityManagerFactory emf,
                                                              Map<?,​?> properties,
                                                              boolean synchronizedWithTransaction)
                                                       throws PersistenceException

  Obtain a JPA EntityManager from the given factory. Is aware of a corresponding EntityManager bound to the current thread, e.g. when using JpaTransactionManager.

  Same as getEntityManager, but throwing the original PersistenceException.

  参数:

  emf - the EntityManagerFactory to create the EntityManager with

  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)

  返回:

  the EntityManager, or null if none found

  抛出:

  PersistenceException - if the EntityManager couldn't be created

  另请参阅:

  getTransactionalEntityManager(javax.persistence.EntityManagerFactory), JpaTransactionManager

• applyTransactionTimeout

  public static void applyTransactionTimeout​(Query query,
                                             EntityManagerFactory emf)

  Apply the current transaction timeout, if any, to the given JPA Query object.

  This method sets the JPA 2.0 query hint "javax.persistence.query.timeout" accordingly.

  参数:

  query - the JPA Query object

  emf - the JPA EntityManagerFactory that the Query was created for

• convertJpaAccessExceptionIfPossible

  public static DataAccessException convertJpaAccessExceptionIfPossible​(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. For more fine-granular conversion, JpaTransactionManager etc support sophisticated translation of exceptions via a JpaDialect.

  参数:

  ex - runtime exception that occurred

  返回:

  the corresponding DataAccessException instance, or null if the exception should not be translated

• closeEntityManager

  public static void closeEntityManager​(EntityManager em)

  Close the given JPA EntityManager, catching and logging any cleanup exceptions thrown.

  参数:

  em - the JPA EntityManager to close (may be null)

  另请参阅:

  EntityManager.close()