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/**
 * Copyright (C) 2000-2010 Atomikos 
 *
 * This code ("Atomikos TransactionsEssentials"), by itself,
 * is being distributed under the
 * Apache License, Version 2.0 ("License"), a copy of which may be found at
 * http://www.atomikos.com/licenses/apache-license-2.0.txt .
 * You may not use this file except in compliance with the License.
 *
 * While the License grants certain patent license rights,
 * those patent license rights only extend to the use of
 * Atomikos TransactionsEssentials by itself.
 *
 * This code (Atomikos TransactionsEssentials) contains certain interfaces
 * in package (namespace) com.atomikos.icatch
 * (including com.atomikos.icatch.Participant) which, if implemented, may
 * infringe one or more patents held by Atomikos.
 * It should be appreciated that you may NOT implement such interfaces;
 * licensing to implement these interfaces must be obtained separately from Atomikos.
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 */

package com.atomikos.icatch.jta;

import java.io.Serializable;

import javax.naming.NamingException;
import javax.naming.Reference;
import javax.naming.Referenceable;
import javax.transaction.HeuristicMixedException;
import javax.transaction.HeuristicRollbackException;
import javax.transaction.InvalidTransactionException;
import javax.transaction.NotSupportedException;
import javax.transaction.RollbackException;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import javax.transaction.UserTransaction;

import com.atomikos.util.SerializableObjectFactory;

/**
 * 
 * 
 * 
 * 
 * 
 * An implementation of TransactionManager that should be used by J2EE
 * applications. Instances can be bound in JNDI if the application server allows
 * this.
 */
public class J2eeTransactionManager 
implements TransactionManager,
        Serializable, Referenceable, UserTransaction
{
	private static final long serialVersionUID = 8584376600562353607L;
	
	private transient TransactionManagerImp tm;

    private void checkSetup () throws SystemException
    {
        tm = (TransactionManagerImp) TransactionManagerImp
                .getTransactionManager ();
        if ( tm == null ) {
            throw new RuntimeException ( "Transaction Service not running?" );
        }
    }

    /**
     * @see javax.transaction.TransactionManager#begin()
     */
    public void begin () throws NotSupportedException, SystemException
    {
        checkSetup ();
        tm.begin ();

    }

    /**
     * @see javax.transaction.TransactionManager#commit()
     */
    public void commit () throws RollbackException, HeuristicMixedException,
            HeuristicRollbackException, SecurityException,
            IllegalStateException, SystemException
    {
        checkSetup ();
        tm.commit ();

    }

    /**
     * @see javax.transaction.TransactionManager#getStatus()
     */
    public int getStatus () throws SystemException
    {
        checkSetup ();
        return tm.getStatus ();
    }

    /**
     * @see javax.transaction.TransactionManager#getTransaction()
     */
    public Transaction getTransaction () throws SystemException
    {
        checkSetup ();
        return tm.getTransaction ();
    }

    /**
     * @see javax.transaction.TransactionManager#resume(javax.transaction.Transaction)
     */
    public void resume ( Transaction tx ) throws InvalidTransactionException,
            IllegalStateException, SystemException
    {
        checkSetup ();
        tm.resume ( tx );

    }

    /**
     * @see javax.transaction.TransactionManager#rollback()
     */
    public void rollback () throws IllegalStateException, SecurityException,
            SystemException
    {
        checkSetup ();
        tm.rollback ();

    }

    /**
     * @see javax.transaction.TransactionManager#setRollbackOnly()
     */
    public void setRollbackOnly () throws IllegalStateException,
            SystemException
    {
        checkSetup ();
        tm.setRollbackOnly ();

    }

    /**
     * @see javax.transaction.TransactionManager#setTransactionTimeout(int)
     */
    public void setTransactionTimeout ( int secs ) throws SystemException
    {
        checkSetup ();
        tm.setTransactionTimeout ( secs );

    }

    /**
     * @see javax.transaction.TransactionManager#suspend()
     */
    public Transaction suspend () throws SystemException
    {
        checkSetup ();
        return tm.suspend ();
    }

    public Reference getReference () throws NamingException
    {
        return SerializableObjectFactory.createReference ( this );
    }

}




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