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}