/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2007-2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.engine.transaction.internal.jdbc;
import java.sql.Connection;
import java.sql.SQLException;
import org.hibernate.HibernateException;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.TransactionException;
import org.hibernate.engine.transaction.spi.AbstractTransactionImpl;
import org.hibernate.engine.transaction.spi.IsolationDelegate;
import org.hibernate.engine.transaction.spi.JoinStatus;
import org.hibernate.engine.transaction.spi.LocalStatus;
import org.hibernate.engine.transaction.spi.TransactionCoordinator;
import org.jboss.logging.Logger;
/**
* {@link org.hibernate.Transaction} implementation based on transaction management through a JDBC {@link java.sql.Connection}.
* <p/>
* This the default transaction strategy.
*
* @author Anton van Straaten
* @author Gavin King
* @author Steve Ebersole
*/
public class JdbcTransaction extends AbstractTransactionImpl {
private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, JdbcTransaction.class.getName());
private Connection managedConnection;
private boolean wasInitiallyAutoCommit;
private boolean isDriver;
protected JdbcTransaction(TransactionCoordinator transactionCoordinator) {
super( transactionCoordinator );
}
@Override
protected void doBegin() {
try {
if ( managedConnection != null ) {
throw new TransactionException( "Already have an associated managed connection" );
}
managedConnection = transactionCoordinator().getJdbcCoordinator().getLogicalConnection().getConnection();
wasInitiallyAutoCommit = managedConnection.getAutoCommit();
LOG.debug("initial autocommit status: " + wasInitiallyAutoCommit);
if ( wasInitiallyAutoCommit ) {
LOG.debug("disabling autocommit");
managedConnection.setAutoCommit( false );
}
}
catch( SQLException e ) {
throw new TransactionException( "JDBC begin transaction failed: ", e );
}
isDriver = transactionCoordinator().takeOwnership();
}
@Override
protected void afterTransactionBegin() {
if ( getTimeout() > 0 ) {
transactionCoordinator().getJdbcCoordinator().setTransactionTimeOut( getTimeout() );
}
transactionCoordinator().sendAfterTransactionBeginNotifications( this );
if ( isDriver ) {
transactionCoordinator().getTransactionContext().afterTransactionBegin( this );
}
}
@Override
protected void beforeTransactionCommit() {
transactionCoordinator().sendBeforeTransactionCompletionNotifications( this );
// basically, if we are the driver of the transaction perform a managed flush prior to
// physically committing the transaction
if ( isDriver && !transactionCoordinator().getTransactionContext().isFlushModeNever() ) {
// if an exception occurs during flush, user must call rollback()
transactionCoordinator().getTransactionContext().managedFlush();
}
if ( isDriver ) {
transactionCoordinator().getTransactionContext().beforeTransactionCompletion( this );
}
}
@Override
protected void doCommit() throws TransactionException {
try {
managedConnection.commit();
LOG.debug("committed JDBC Connection");
}
catch( SQLException e ) {
throw new TransactionException( "unable to commit against JDBC connection", e );
}
finally {
releaseManagedConnection();
}
}
private void releaseManagedConnection() {
try {
if ( wasInitiallyAutoCommit ) {
LOG.debug("re-enabling autocommit");
managedConnection.setAutoCommit( true );
}
managedConnection = null;
}
catch ( Exception e ) {
LOG.debug("Could not toggle autocommit", e);
}
}
@Override
protected void afterTransactionCompletion(int status) {
transactionCoordinator().afterTransaction( this, status );
}
@Override
protected void afterAfterCompletion() {
if ( isDriver
&& transactionCoordinator().getTransactionContext().shouldAutoClose()
&& !transactionCoordinator().getTransactionContext().isClosed() ) {
try {
transactionCoordinator().getTransactionContext().managedClose();
}
catch (HibernateException e) {
LOG.unableToCloseSessionButSwallowingError(e);
}
}
}
@Override
protected void beforeTransactionRollBack() {
// nothing to do here
}
@Override
protected void doRollback() throws TransactionException {
try {
managedConnection.rollback();
LOG.debug("rolled JDBC Connection");
}
catch( SQLException e ) {
throw new TransactionException( "unable to rollback against JDBC connection", e );
}
finally {
releaseManagedConnection();
}
}
@Override
public boolean isInitiator() {
return isActive();
}
@Override
public IsolationDelegate createIsolationDelegate() {
return new JdbcIsolationDelegate( transactionCoordinator() );
}
@Override
public JoinStatus getJoinStatus() {
return isActive() ? JoinStatus.JOINED : JoinStatus.NOT_JOINED;
}
@Override
public void markRollbackOnly() {
// nothing to do here
}
@Override
public void join() {
// nothing to do
}
@Override
public void resetJoinStatus() {
// nothing to do
}
@Override
public boolean isActive() throws HibernateException {
return getLocalStatus() == LocalStatus.ACTIVE;
}
}