001/*
002 * HA-JDBC: High-Availability JDBC
003 * Copyright (c) 2004-2007 Paul Ferraro
004 * 
005 * This library is free software; you can redistribute it and/or modify it 
006 * under the terms of the GNU Lesser General Public License as published by the 
007 * Free Software Foundation; either version 2.1 of the License, or (at your 
008 * option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful, but WITHOUT
011 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
012 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License 
013 * for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public License
016 * along with this library; if not, write to the Free Software Foundation, 
017 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
018 * 
019 * Contact: ferraro@users.sourceforge.net
020 */
021package net.sf.hajdbc.distributable;
022
023import java.util.Map;
024import java.util.concurrent.locks.Lock;
025
026import org.jgroups.Address;
027
028import net.sf.hajdbc.LockManager;
029
030/**
031 * @author Paul Ferraro
032 * @since 2.0
033 */
034public class ReleaseLockDecree extends AbstractLockDecree
035{
036        private static final long serialVersionUID = -2410005124267913965L;
037
038        public ReleaseLockDecree()
039        {
040                super();
041        }
042
043        public ReleaseLockDecree(String id, Address address)
044        {
045                super(id, address);
046        }
047
048        /**
049         * @see net.sf.hajdbc.distributable.LockDecree#vote(net.sf.hajdbc.LockManager, java.util.Map)
050         */
051        @Override
052        public boolean vote(LockManager lockManager, Map<String, Lock> lockMap)
053        {
054                Lock lock = null;
055                
056                synchronized (lockMap)
057                {
058                        lock = lockMap.remove(this.id);
059                }
060                
061                if (lock != null)
062                {
063                        lock.unlock();
064                }
065                
066                return true;
067        }
068}