org.mule.transaction.ExternalXaTransaction Maven / Gradle / Ivy

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/*
 * $Id: ExternalXaTransaction.java 19191 2010-08-25 21:05:23Z tcarlson $
 * --------------------------------------------------------------------------------------
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 *
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */

package org.mule.transaction;

import org.mule.api.MuleContext;
import org.mule.api.transaction.TransactionException;
import org.mule.config.i18n.CoreMessages;

import java.text.MessageFormat;

import javax.transaction.Status;
import javax.transaction.Synchronization;

/**
 * ExternalXaTransaction represents an external XA transaction in Mule.
 */
public class ExternalXaTransaction extends XaTransaction
{
    public ExternalXaTransaction(MuleContext muleContext)
    {
        super(muleContext);
    }

    protected void doBegin() throws TransactionException
    {
        if (txManager == null)
        {
            throw new IllegalStateException(
                    CoreMessages.objectNotRegistered("javax.transaction.TransactionManager", "Transaction Manager").getMessage());
        }

        try
        {
            synchronized (this)
            {
                transaction = txManager.getTransaction();
                transaction.registerSynchronization(new ExternalTransaction(muleContext));
            }
        }
        catch (Exception e)
        {
            throw new TransactionException(CoreMessages.cannotStartTransaction("XA"), e);
        }
    }

    /**
     * This class is notified when an external transaction is complete and cleans up
     * Mule-specific resources
     */
    class ExternalTransaction extends AbstractTransaction implements Synchronization
    {
        ExternalTransaction(MuleContext muleContext)
        {
            super(muleContext);
        }
        
        /** Nothing to do */
        public void beforeCompletion()
        {
        }

        /** Clean up mule resources */
        public void afterCompletion(int status)
        {
            boolean commit = status == Status.STATUS_COMMITTED;

            try
            {
                if (commit)
                {
                    commit();
                }
                else
                {
                    rollback();
                }
            }
            catch (TransactionException ex)
            {
                logger.warn(MessageFormat.format(
                    "Exception while {0} an external transaction {1}", commit ? "committing" : "rolling back", this), ex);
            }
        }

        @Override
        protected void unbindTransaction()
        {
            // no-op -- already unbound in TransactionTemplate
        }

        @Override
        protected void doCommit()
        {
            delistResources();
            closeResources();
            transaction = null;
        }

        @Override
        protected void doRollback()
        {
            closeResources();
            transaction = null;
        }

        @Override
        protected void doBegin()
        {
        }

        @Override
        public boolean isRollbackOnly() throws TransactionException
        {
            return ExternalXaTransaction.this.isRollbackOnly();
        }

        public int getStatus() throws TransactionException
        {
            return ExternalXaTransaction.this.getStatus();
        }

        public Object getResource(Object key)
        {
            return ExternalXaTransaction.this.getResource(key);
        }

        public boolean hasResource(Object key)
        {
            return ExternalXaTransaction.this.hasResource(key);
        }

        public void bindResource(Object key, Object resource) throws TransactionException
        {
        }

        public void setRollbackOnly() throws TransactionException
        {
        }
    }
}