001/*
002 * HA-JDBC: High-Availability JDBC
003 * Copyright (C) 2012  Paul Ferraro
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Lesser General Public License as published by
007 * the Free Software Foundation, either version 3 of the License, or
008 * (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Lesser General Public License for more details.
014 *
015 * You should have received a copy of the GNU Lesser General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018package net.sf.hajdbc.lock.distributed;
019
020import java.util.concurrent.TimeUnit;
021import java.util.concurrent.locks.Lock;
022
023/**
024 * Acquire lock command for execution on group coordinator.
025 * @author Paul Ferraro
026 */
027public class CoordinatorAcquireLockCommand extends CoordinatorLockCommand<Boolean>
028{
029        private static final long serialVersionUID = 1725113200306907771L;
030        
031        private final long timeout;
032        
033        public CoordinatorAcquireLockCommand(RemoteLockDescriptor descriptor, long timeout)
034        {
035                super(descriptor);
036
037                this.timeout = timeout;
038        }
039
040        /**
041         * {@inheritDoc}
042         * @see net.sf.hajdbc.lock.distributed.CoordinatorLockCommand#execute(java.util.concurrent.locks.Lock)
043         */
044        @Override
045        protected Boolean execute(Lock lock)
046        {
047                try
048                {
049                        return lock.tryLock(this.timeout, TimeUnit.MILLISECONDS);
050                }
051                catch (InterruptedException e)
052                {
053                        Thread.currentThread().interrupt();
054                        
055                        return false;
056                }
057        }
058}