/*
 * JBoss, Home of Professional Open Source
 * Copyright 2006, Red Hat Middleware LLC, and individual contributors 
 * as indicated by the @author tags. 
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors. 
 * 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, v. 2.1.
 * This program is distributed in the hope that it will be useful, but WITHOUT A 
 * 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,
 * v.2.1 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
 * MA  02110-1301, USA.
 * 
 * (C) 2005-2006,
 * @author JBoss Inc.
 */
/*
 * Copyright (C) 1998, 1999, 2000,
 *
 * Arjuna Solutions Limited,
 * Newcastle upon Tyne,
 * Tyne and Wear,
 * UK.  
 *
 * $Id: RecoverableObject.java 2342 2006-03-30 13:06:17Z  $
 */

package com.hp.mwtests.ts.txoj.common.resources;

import com.arjuna.ats.arjuna.*;
import com.arjuna.ats.arjuna.coordinator.*;
import com.arjuna.ats.arjuna.state.*;
import com.arjuna.ats.arjuna.gandiva.*;
import com.arjuna.ats.arjuna.common.*;
import com.arjuna.ats.txoj.*;
import com.arjuna.ats.txoj.common.*;

import java.io.IOException;

public class RecoverableObject extends LockManager
{

public RecoverableObject ()
    {
	AtomicAction A = new AtomicAction();

	A.begin();

	if (setlock(new Lock(LockMode.WRITE), 0) == LockResult.GRANTED)
	{
	    state = 0;

	    if (A.commit() == ActionStatus.COMMITTED)
		System.out.println("Created recoverable object "+get_uid());
	    else
		System.out.println("Action.commit error.");
	}
	else
	{
	    A.abort();
	    
	    System.out.println("setlock error.");
	}
    }

public void finalize ()
    {
	super.terminate();

	try
	{
	    super.finalize();
	}
	catch (Throwable e)
	{
	}
    }

public boolean set (int value)
    {
	AtomicAction A = new AtomicAction();

	A.begin();

	if (setlock(new Lock(LockMode.WRITE)) == LockResult.GRANTED)
	{
	    state = value;

	    if (A.commit() == ActionStatus.COMMITTED)
		return true;
	    else
		return false;
	}

	A.abort();

	return false;
    }

public int get ()
    {
	AtomicAction A = new AtomicAction();
	int value = -1;

	A.begin();

	if (setlock(new Lock(LockMode.READ)) == LockResult.GRANTED)
	{
	    value = state;

	    if (A.commit() == ActionStatus.COMMITTED)
		return value;
	    else
		return -1;
	}

	A.abort();

	return -1;
    }

public boolean save_state (OutputObjectState os, int ot)
    {
	boolean result = super.save_state(os, ot);

	if (!result)
	    return false;
	
	try
	{
	    os.packInt(state);
	}
	catch (IOException e)
	{
	    result = false;
	}

	return result;
    }

public boolean restore_state (InputObjectState os, int ot)
    {
	boolean result = super.restore_state(os, ot);

	if (!result)
	    return false;
	
	try
	{
	    state = os.unpackInt();
	}
	catch (IOException e)
	{
	    result = false;
	}

	return result;
    }
    
public String type ()
    {
	return "/StateManager/LockManager/RecoverableObject";
    }
    
private int state;
    
};

