/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.transaction;
import com.caucho.util.L10N;
import javax.naming.InitialContext;
import javax.transaction.Status;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import javax.transaction.UserTransaction;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Transaction identifier implementation.
*/
public class TransactionContainer {
private static final L10N L = new L10N(TransactionContainer.class);
private static final Logger log
= Logger.getLogger(TransactionContainer.class.getName());
private static TransactionContainer _container;
private UserTransaction _userTM;
private TransactionManager _tm;
public static TransactionContainer getTransactionContainer()
{
if (_container == null) {
_container = new TransactionContainer();
try {
InitialContext ic = new InitialContext();
UserTransaction userTM;
userTM = (UserTransaction) ic.lookup("java:comp/UserTransaction");
_container.setUserTransaction(userTM);
TransactionManager tm;
tm = (TransactionManager) ic.lookup("java:comp/TransactionManager");
_container.setTransactionManager(tm);
} catch (Throwable e) {
log.log(Level.WARNING, e.toString(), e);
}
}
return _container;
}
/**
* Sets the user transaction.
*/
public void setUserTransaction(UserTransaction userTM)
{
_userTM = userTM;
}
/**
* Sets the transaction manager.
*/
public void setTransactionManager(TransactionManager tm)
{
_tm = tm;
}
/**
* Returns a transaction context for the "required" transaction. If
* there's already an active transaction, use it. Otherwise create a
* new transaction.
*
* @return the current transaction context
*/
public Transaction beginRequired()
{
try {
Transaction currentTrans = _tm.getTransaction();
if (currentTrans != null)
return currentTrans;
// _userTransaction.setTransactionTimeout((int) (_transactionTimeout / 1000L));
_userTM.begin();
return null;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new TransactionRuntimeException(e);
}
}
/**
* Returns a transaction context for the "RequiresNew" transaction.
* Always creates a new transaction, suspending any old one.
*
* @return the current transaction context
*/
public Transaction beginRequiresNew()
{
try {
Transaction oldTrans = _tm.getTransaction();
if (oldTrans != null)
oldTrans = _tm.suspend();
// _userTransaction.setTransactionTimeout((int) (_transactionTimeout / 1000L));
_userTM.begin();
return oldTrans;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new TransactionRuntimeException(e);
}
}
/**
* Require a transaction, throwing an exception if none exists.
*
* @return the current transaction context
*/
public void beginMandatory()
{
try {
Transaction oldTrans = _tm.getTransaction();
if (oldTrans == null)
throw new TransactionRuntimeException(L.l("'Mandatory' transaction boundary requires a transaction."));
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new TransactionRuntimeException(e);
}
}
/**
* Require no transactions, throwing an exception if one exists.
*/
public void beginNever()
{
try {
Transaction oldTrans = _tm.getTransaction();
if (oldTrans != null)
throw new TransactionRuntimeException(L.l("'Never' transaction boundary must not have a transaction."));
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new TransactionRuntimeException(e);
}
}
/**
* Suspends any active transaction.
* @return the current transaction context
*/
public Transaction beginSuspend()
{
try {
Transaction oldTrans = _tm.getTransaction();
if (oldTrans != null)
oldTrans = _tm.suspend();
return oldTrans;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new TransactionRuntimeException(e);
}
}
/**
* Sets a rollback-only transaction.
*/
public void setRollbackOnly(Throwable e)
{
}
/**
* Commits the transaction (rolling back if rollback only)
*/
public void commit(Transaction oldTransaction)
{
try {
Transaction currentTrans = _tm.getTransaction();
if (currentTrans == null) {
}
else if (currentTrans.getStatus() != Status.STATUS_MARKED_ROLLBACK)
_userTM.commit();
else
_userTM.rollback();
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new TransactionRuntimeException(e);
} finally {
if (oldTransaction != null) {
try {
_tm.resume(oldTransaction);
} catch (Exception e) {
throw new TransactionRuntimeException(e);
}
}
}
}
/**
* Rolls back any existing transaction.
*/
public void rollback(Transaction oldTransaction)
{
try {
Transaction currentTrans = _tm.getTransaction();
if (currentTrans != null)
_userTM.rollback();
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new TransactionRuntimeException(e);
} finally {
if (oldTransaction != null) {
try {
_tm.resume(oldTransaction);
} catch (Exception e) {
throw new TransactionRuntimeException(e);
}
}
}
}
}