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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.orm.jpa.vendor

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.springframework.orm.jpa .DefaultJpaDialect

org.springframework.orm.jpa.vendor .TopLinkJpaDialect

TopLinkJpaDialect
public class TopLinkJpaDialect extends DefaultJpaDialect (Code)
	org.springframework.orm.jpa.JpaDialect implementation for Oracle TopLink Essentials. Developed and tested against TopLink Essentials v2. By default, this class acquires a TopLink transaction to get the JDBC connection early. This allows mixing JDBC and JPA/TopLink operations in the same transaction. In some cases, this eager acquisition of a transaction/connection may impact scalability. In that case, set the "lazyDatabaseTransaction" flag to true if you do not require mixing JDBC and JPA operations in the same transaction. Otherwise, use a org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy to ensure that the cost of connection acquisition is near zero until code actually needs a JDBC Connection. author: Rod Johnson author: Juergen Hoeller since: 2.0 See Also: TopLinkJpaDialect.setLazyDatabaseTransaction See Also: LazyConnectionDataSourceProxy

Method Summary
public Object	beginTransaction(EntityManager entityManager, TransactionDefinition definition)
public ConnectionHandle	getJdbcConnection(EntityManager em, boolean readOnly)
protected Session	getSession(EntityManager em) Get a traditional TopLink Session from the given EntityManager.
public void	setLazyDatabaseTransaction(boolean lazyDatabaseTransaction) Set whether to lazily start a database transaction within a TopLink transaction. By default, database transactions are started early.

Method Detail

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

getJdbcConnection
public ConnectionHandle getJdbcConnection(EntityManager em, boolean readOnly) throws PersistenceException, SQLException(Code)

getSession
protected Session getSession(EntityManager em)(Code)
	Get a traditional TopLink Session from the given EntityManager.

setLazyDatabaseTransaction

public void setLazyDatabaseTransaction(boolean lazyDatabaseTransaction)(Code)

Set whether to lazily start a database transaction within a TopLink transaction.

By default, database transactions are started early. This allows for reusing the same JDBC Connection throughout an entire transaction, including read operations, and also for exposing TopLink transactions to JDBC access code (working on the same DataSource).

It is only recommended to switch this flag to "true" when no JDBC access code is involved in any of the transactions, and when it is acceptable to perform read operations outside of the transactional JDBC Connection.
See Also: oracle.toplink.sessions.UnitOfWork.beginEarlyTransaction

Methods inherited from org.springframework.orm.jpa.DefaultJpaDialect

public Object beginTransaction(EntityManager entityManager, TransactionDefinition definition) throws PersistenceException, SQLException, TransactionException(Code)(Java Doc)
public void cleanupTransaction(Object transactionData)(Code)(Java Doc)
public EntityManagerFactoryPlusOperations getEntityManagerFactoryPlusOperations(EntityManagerFactory rawEntityManager)(Code)(Java Doc)
public EntityManagerPlusOperations getEntityManagerPlusOperations(EntityManager rawEntityManager)(Code)(Java Doc)
public ConnectionHandle getJdbcConnection(EntityManager entityManager, boolean readOnly) throws PersistenceException, SQLException(Code)(Java Doc)
public void releaseJdbcConnection(ConnectionHandle conHandle, EntityManager em) throws PersistenceException, SQLException(Code)(Java Doc)
public boolean supportsEntityManagerFactoryPlusOperations()(Code)(Java Doc)
public boolean supportsEntityManagerPlusOperations()(Code)(Java Doc)
public DataAccessException translateExceptionIfPossible(RuntimeException ex)(Code)(Java Doc)

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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