org.hibernate.transaction.JDBCTransaction Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
*
* 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.transaction;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.transaction.Status;
import javax.transaction.Synchronization;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.HibernateException;
import org.hibernate.Transaction;
import org.hibernate.TransactionException;
import org.hibernate.jdbc.JDBCContext;
/**
* {@link Transaction} implementation based on transaction management through
* a JDBC {@link java.sql.Connection}.
*
* This the Hibernate's default transaction strategy.
*
* @author Anton van Straaten
* @author Gavin King
*/
public class JDBCTransaction implements Transaction {
private static final Logger log = LoggerFactory.getLogger(JDBCTransaction.class);
private final JDBCContext jdbcContext;
private final TransactionFactory.Context transactionContext;
private boolean toggleAutoCommit;
private boolean begun;
private boolean rolledBack;
private boolean committed;
private boolean commitFailed;
private List synchronizations;
private boolean callback;
private int timeout = -1;
public JDBCTransaction(JDBCContext jdbcContext, TransactionFactory.Context transactionContext) {
this.jdbcContext = jdbcContext;
this.transactionContext = transactionContext;
}
/**
* {@inheritDoc}
*/
public void begin() throws HibernateException {
if (begun) {
return;
}
if (commitFailed) {
throw new TransactionException("cannot re-start transaction after failed commit");
}
log.debug("begin");
try {
toggleAutoCommit = jdbcContext.connection().getAutoCommit();
if ( log.isDebugEnabled() ) {
log.debug("current autocommit status: " + toggleAutoCommit);
}
if (toggleAutoCommit) {
log.debug("disabling autocommit");
jdbcContext.connection().setAutoCommit(false);
}
}
catch (SQLException e) {
log.error("JDBC begin failed", e);
throw new TransactionException("JDBC begin failed: ", e);
}
callback = jdbcContext.registerCallbackIfNecessary();
begun = true;
committed = false;
rolledBack = false;
if ( timeout>0 ) {
jdbcContext.getConnectionManager()
.getBatcher()
.setTransactionTimeout(timeout);
}
jdbcContext.afterTransactionBegin(this);
}
private void closeIfRequired() throws HibernateException {
if ( callback && transactionContext.shouldAutoClose() && !transactionContext.isClosed() ) {
try {
transactionContext.managedClose();
}
catch (HibernateException he) {
log.error("Could not close session", he);
//swallow, the transaction was finished
}
}
}
/**
* {@inheritDoc}
*/
public void commit() throws HibernateException {
if (!begun) {
throw new TransactionException("Transaction not successfully started");
}
log.debug("commit");
if ( !transactionContext.isFlushModeNever() && callback ) {
transactionContext.managedFlush(); //if an exception occurs during flush, user must call rollback()
}
notifyLocalSynchsBeforeTransactionCompletion();
if ( callback ) {
jdbcContext.beforeTransactionCompletion( this );
}
try {
commitAndResetAutoCommit();
log.debug("committed JDBC Connection");
committed = true;
if ( callback ) {
jdbcContext.afterTransactionCompletion( true, this );
}
notifyLocalSynchsAfterTransactionCompletion( Status.STATUS_COMMITTED );
}
catch (SQLException e) {
log.error("JDBC commit failed", e);
commitFailed = true;
if ( callback ) {
jdbcContext.afterTransactionCompletion( false, this );
}
notifyLocalSynchsAfterTransactionCompletion( Status.STATUS_UNKNOWN );
throw new TransactionException("JDBC commit failed", e);
}
finally {
closeIfRequired();
}
}
private void commitAndResetAutoCommit() throws SQLException {
try {
jdbcContext.connection().commit();
}
finally {
toggleAutoCommit();
}
}
/**
* {@inheritDoc}
*/
public void rollback() throws HibernateException {
if (!begun && !commitFailed) {
throw new TransactionException("Transaction not successfully started");
}
log.debug("rollback");
if (!commitFailed) {
/*notifyLocalSynchsBeforeTransactionCompletion();
if ( callback ) {
jdbcContext.notifyLocalSynchsBeforeTransactionCompletion( this );
}*/
try {
rollbackAndResetAutoCommit();
log.debug("rolled back JDBC Connection");
rolledBack = true;
notifyLocalSynchsAfterTransactionCompletion(Status.STATUS_ROLLEDBACK);
}
catch (SQLException e) {
log.error("JDBC rollback failed", e);
notifyLocalSynchsAfterTransactionCompletion(Status.STATUS_UNKNOWN);
throw new TransactionException("JDBC rollback failed", e);
}
finally {
if ( callback ) {
jdbcContext.afterTransactionCompletion( false, this );
}
closeIfRequired();
}
}
}
private void rollbackAndResetAutoCommit() throws SQLException {
try {
jdbcContext.connection().rollback();
}
finally {
toggleAutoCommit();
}
}
private void toggleAutoCommit() {
try {
if (toggleAutoCommit) {
log.debug("re-enabling autocommit");
jdbcContext.connection().setAutoCommit( true );
}
}
catch (Exception sqle) {
log.error("Could not toggle autocommit", sqle);
//swallow it (the transaction _was_ successful or successfully rolled back)
}
}
/**
* {@inheritDoc}
*/
public boolean wasRolledBack() {
return rolledBack;
}
/**
* {@inheritDoc}
*/
public boolean wasCommitted() {
return committed;
}
/**
* {@inheritDoc}
*/
public boolean isActive() {
return begun && ! ( rolledBack || committed | commitFailed );
}
/**
* {@inheritDoc}
*/
public void registerSynchronization(Synchronization sync) throws HibernateException {
if (sync==null) throw new NullPointerException("null Synchronization");
if (synchronizations==null) {
synchronizations = new ArrayList();
}
synchronizations.add(sync);
}
private void notifyLocalSynchsBeforeTransactionCompletion() {
if (synchronizations!=null) {
for ( int i=0; i