org.hibernate.transaction.CMTTransaction 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 javax.transaction.Status;
import javax.transaction.Synchronization;
import javax.transaction.SystemException;
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;
import org.hibernate.util.JTAHelper;
/**
* Implements a basic transaction strategy for CMT transactions. All work is
* done in the context of the container managed transaction.
*
* The term 'CMT' is potentially misleading here; the pertinent point simply
* being that the transactions are being managed by something other than the
* Hibernate transaction mechanism.
*
* @author Gavin King
*/
public class CMTTransaction implements Transaction {
private static final Logger log = LoggerFactory.getLogger(CMTTransaction.class);
protected final JDBCContext jdbcContext;
protected final TransactionFactory.Context transactionContext;
private boolean begun;
public CMTTransaction(JDBCContext jdbcContext, TransactionFactory.Context transactionContext) {
this.jdbcContext = jdbcContext;
this.transactionContext = transactionContext;
}
/**
* {@inheritDoc}
*/
public void begin() throws HibernateException {
if (begun) {
return;
}
log.debug("begin");
boolean synchronization = jdbcContext.registerSynchronizationIfPossible();
if ( !synchronization ) {
throw new TransactionException("Could not register synchronization for container transaction");
}
begun = true;
jdbcContext.afterTransactionBegin(this);
}
/**
* {@inheritDoc}
*/
public void commit() throws HibernateException {
if (!begun) {
throw new TransactionException("Transaction not successfully started");
}
log.debug("commit");
boolean flush = !transactionContext.isFlushModeNever() &&
!transactionContext.isFlushBeforeCompletionEnabled();
if (flush) {
transactionContext.managedFlush(); //if an exception occurs during flush, user must call rollback()
}
begun = false;
}
/**
* {@inheritDoc}
*/
public void rollback() throws HibernateException {
if (!begun) {
throw new TransactionException("Transaction not successfully started");
}
log.debug("rollback");
try {
getTransaction().setRollbackOnly();
}
catch (SystemException se) {
log.error("Could not set transaction to rollback only", se);
throw new TransactionException("Could not set transaction to rollback only", se);
}
begun = false;
}
/**
* Getter for property 'transaction'.
*
* @return Value for property 'transaction'.
*/
public javax.transaction.Transaction getTransaction() throws SystemException {
return transactionContext.getFactory().getTransactionManager().getTransaction();
}
/**
* {@inheritDoc}
*/
public boolean isActive() throws TransactionException {
if (!begun) return false;
final int status;
try {
status = getTransaction().getStatus();
}
catch (SystemException se) {
log.error("Could not determine transaction status", se);
throw new TransactionException("Could not determine transaction status: ", se);
}
if (status==Status.STATUS_UNKNOWN) {
throw new TransactionException("Could not determine transaction status");
}
else {
return status==Status.STATUS_ACTIVE;
}
}
/**
* {@inheritDoc}
*/
public boolean wasRolledBack() throws TransactionException {
if (!begun) return false;
final int status;
try {
status = getTransaction().getStatus();
}
catch (SystemException se) {
log.error("Could not determine transaction status", se);
throw new TransactionException("Could not determine transaction status", se);
}
if (status==Status.STATUS_UNKNOWN) {
throw new TransactionException("Could not determine transaction status");
}
else {
return JTAHelper.isRollback(status);
}
}
/**
* {@inheritDoc}
*/
public boolean wasCommitted() throws TransactionException {
if ( !begun ) return false;
final int status;
try {
status = getTransaction().getStatus();
}
catch (SystemException se) {
log.error("Could not determine transaction status", se);
throw new TransactionException("Could not determine transaction status: ", se);
}
if (status==Status.STATUS_UNKNOWN) {
throw new TransactionException("Could not determine transaction status");
}
else {
return status==Status.STATUS_COMMITTED;
}
}
/**
* {@inheritDoc}
*/
public void registerSynchronization(Synchronization sync) throws HibernateException {
try {
getTransaction().registerSynchronization(sync);
}
catch (Exception e) {
throw new TransactionException("Could not register synchronization", e);
}
}
/**
* {@inheritDoc}
*/
public void setTimeout(int seconds) {
throw new UnsupportedOperationException("cannot set transaction timeout in CMT");
}
}