Package com.hp.mwtests.ts.jts.orbspecific.resources

Source Code of com.hp.mwtests.ts.jts.orbspecific.resources.AtomicObject

/*
* 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: AtomicObject.java 2342 2006-03-30 13:06:17Z  $
*/

package com.hp.mwtests.ts.jts.orbspecific.resources;

import com.arjuna.ats.internal.jts.OTSImpleManager;
import com.arjuna.ats.internal.jts.orbspecific.CurrentImple;

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

import com.arjuna.ats.txoj.*;

import com.hp.mwtests.ts.jts.exceptions.TestException;

import org.omg.CosTransactions.SubtransactionsUnavailable;
import java.io.IOException;

public class AtomicObject extends LockManager
{

    public AtomicObject ()
    {
  super(ObjectType.ANDPERSISTENT);

  CurrentImple current = OTSImpleManager.current();

  _value = 0;

  try
  {
      current.begin();

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

    current.commit(false);
      }
      else
    current.rollback();
  }
  catch (Exception e)
  {
      System.out.println("AtomicObject "+e);
  }
    }

    public AtomicObject (Uid u)
    {
  super(u);
    }

    public void finalize () throws Throwable
    {
  super.terminate();
  super.finalize();
    }

    public synchronized boolean incr (int value)
    {
  boolean res = false;
  CurrentImple current = OTSImpleManager.current();

  try
  {
      current.begin();

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

    current.commit(false);
    res = true;
      }
      else
    current.rollback();
  }
  catch (Exception e)
  {
      System.out.println(e);
      e.printStackTrace();

      res = false;
  }

  return res;
    }

    public synchronized boolean set (int value)
    {
  boolean res = false;
  CurrentImple current = OTSImpleManager.current();   

  try
  {
      current.begin();

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

    current.commit(false);
    res = true;
      }
      else
    current.rollback();
  }
  catch (Exception e)
  {
      System.out.println(e);
      e.printStackTrace();

      res = false;
  }

  return res;
    }

    public synchronized int get () throws TestException
    {
  boolean res = false;
  CurrentImple current = OTSImpleManager.current();   
  int value = -1;

  try
  {
      current.begin();

      if (setlock(new Lock(LockMode.READ), 0) == LockResult.GRANTED)
      {
    value = _value;

    current.commit(false);
    res = true;
      }
      else
    current.rollback();
  }
  catch (Exception e)
  {
      System.out.println(e);
      e.printStackTrace();

      res = false;
  }

  if (!res)
      throw new TestException();
  else
      return value;
    }

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

  if (!result)
      return false;

  try
  {
      os.packInt(_value);
  }
  catch (IOException e)
  {
      result = false;
  }

  return result;
    }

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

  if (!result)
      return false;

  try
  {
      _value = os.unpackInt();
  }
  catch (IOException e)
  {
      result = false;
  }

  return result;
    }

    public String type ()
    {
  return "/StateManager/LockManager/AtomicObject";
    }

    private int _value;

}
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