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 net.sf.hajdbc.DatabaseCluster;
024import net.sf.hajdbc.DatabaseClusterDecorator;
025
026import org.jgroups.Channel;
027import org.jgroups.JChannelFactory;
028
029/**
030 * @author Paul Ferraro
031 *
032 */
033public class DistributableDatabaseClusterDecorator implements DatabaseClusterDecorator
034{
035        private JChannelFactory factory;
036        private String config = "stacks.xml"; //$NON-NLS-1$
037        private String stack = "udp-sync"; //$NON-NLS-1$
038        private int timeout = 1000;
039        
040        public Channel createChannel(String name) throws Exception
041        {
042                return this.factory.createMultiplexerChannel(this.stack, name);
043        }
044        
045        /**
046         * Returns the number of milliseconds to allow for jgroups cluster operations
047         * @return a number of milliseconds
048         */
049        public int getTimeout()
050        {
051                return this.timeout;
052        }
053        
054        /**
055         * @see net.sf.hajdbc.DatabaseClusterDecorator#decorate(net.sf.hajdbc.DatabaseCluster)
056         */
057        @Override
058        public <D> void decorate(DatabaseCluster<D> databaseCluster) throws Exception
059        {
060                if (this.factory == null)
061                {
062                        this.factory = new JChannelFactory();
063                        
064                        this.factory.setDomain(JChannelFactory.class.getPackage().getName());
065                        this.factory.setMultiplexerConfig(this.config);
066                        this.factory.create();
067                }
068                
069                databaseCluster.setLockManager(new DistributableLockManager(databaseCluster, this));
070                databaseCluster.setStateManager(new DistributableStateManager(databaseCluster, this));
071        }
072
073        @Override
074        protected void finalize()
075        {
076                this.factory.destroy();
077        }
078}