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.util.concurrent;
022
023import java.util.concurrent.Executors;
024import java.util.concurrent.ThreadFactory;
025
026/**
027 * ThreadFactory implementation that creates daemon threads.
028 * 
029 * @author  Paul Ferraro
030 * @since   1.1
031 */
032public class DaemonThreadFactory implements ThreadFactory
033{
034        private static ThreadFactory instance = new DaemonThreadFactory();
035        
036        private ThreadFactory factory = Executors.defaultThreadFactory();
037        
038        /**
039         * Returns single shared instance
040         * @return a ThreadFactory instance
041         */
042        public static ThreadFactory getInstance()
043        {
044                return instance;
045        }
046        
047        /**
048         * @see java.util.concurrent.ThreadFactory#newThread(java.lang.Runnable)
049         */
050        @Override
051        public Thread newThread(Runnable runnable)
052        {
053                Thread thread = this.factory.newThread(runnable);
054                
055                thread.setDaemon(true);
056
057                return thread;
058        }
059}