类 OpenJpaDialect

构造器详细资料

• OpenJpaDialect

  public OpenJpaDialect()

方法详细资料

• beginTransaction

  public Object beginTransaction​(EntityManager entityManager,
                                 TransactionDefinition definition)
                          throws PersistenceException,
                                 SQLException,
                                 TransactionException

  从类复制的说明: DefaultJpaDialect
  This implementation invokes the standard JPA Transaction.begin method. Throws an InvalidIsolationLevelException if a non-default isolation level is set.

  This implementation does not return any transaction data Object, since there is no state to be kept for a standard JPA transaction. Hence, subclasses do not have to care about the return value (null) of this implementation and are free to return their own transaction data Object.

  指定者:

  beginTransaction 在接口中 JpaDialect

  覆盖:

  beginTransaction 在类中 DefaultJpaDialect

  参数:

  entityManager - the EntityManager to begin a JPA transaction on

  definition - the Spring transaction definition that defines semantics

  返回:

  an arbitrary object that holds transaction data, if any (to be passed into JpaDialect.cleanupTransaction(java.lang.Object)). May implement the SavepointManager interface.

  抛出:

  PersistenceException - if thrown by JPA methods

  SQLException - if thrown by JDBC methods

  TransactionException - in case of invalid arguments

  另请参阅:

  EntityTransaction.begin(), InvalidIsolationLevelException, DefaultJpaDialect.cleanupTransaction(java.lang.Object)

• getJdbcConnection

  public ConnectionHandle getJdbcConnection​(EntityManager entityManager,
                                            boolean readOnly)
                                     throws PersistenceException,
                                            SQLException

  从类复制的说明: DefaultJpaDialect
  This implementation always returns null, indicating that no JDBC Connection can be provided.

  指定者:

  getJdbcConnection 在接口中 JpaDialect

  覆盖:

  getJdbcConnection 在类中 DefaultJpaDialect

  参数:

  entityManager - the current JPA EntityManager

  readOnly - whether the Connection is only needed for read-only purposes

  返回:

  a handle for the Connection, to be passed into releaseJdbcConnection, or null if no JDBC Connection can be retrieved

  抛出:

  PersistenceException - if thrown by JPA methods

  SQLException - if thrown by JDBC methods

  另请参阅:

  JpaDialect.releaseJdbcConnection(org.springframework.jdbc.datasource.ConnectionHandle, javax.persistence.EntityManager), ConnectionHandle.getConnection(), SimpleConnectionHandle, JpaTransactionManager.setDataSource(javax.sql.DataSource), NativeJdbcExtractor

• getOpenJPAEntityManager

  protected org.apache.openjpa.persistence.OpenJPAEntityManager getOpenJPAEntityManager​(EntityManager em)

  Return the OpenJPA-specific variant of EntityManager.

  参数:

  em - the generic EntityManager instance

  返回:

  the OpenJPA-specific variant of EntityManager