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}