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}