001 /* 002 * Copyright (C) 2008-2010 by Holger Arndt 003 * 004 * This file is part of the Universal Java Matrix Package (UJMP). 005 * See the NOTICE file distributed with this work for additional 006 * information regarding copyright ownership and licensing. 007 * 008 * UJMP is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Lesser General Public License as 010 * published by the Free Software Foundation; either version 2 011 * of the License, or (at your option) any later version. 012 * 013 * UJMP is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 016 * GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public 019 * License along with UJMP; if not, write to the 020 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 021 * Boston, MA 02110-1301 USA 022 */ 023 024 package org.ujmp.core.util.concurrent; 025 026 import java.util.concurrent.BlockingQueue; 027 import java.util.concurrent.LinkedBlockingQueue; 028 import java.util.concurrent.ThreadPoolExecutor; 029 import java.util.concurrent.TimeUnit; 030 031 import org.ujmp.core.util.UJMPSettings; 032 033 public class UJMPThreadPoolExecutor extends ThreadPoolExecutor { 034 035 private static final ThreadLocal<ThreadPoolExecutor> executors = new ThreadLocal<ThreadPoolExecutor>(); 036 037 public UJMPThreadPoolExecutor(String name, int corePoolSize, int maximumPoolSize, 038 long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue, int priority, 039 boolean deamon) { 040 super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, new UJMPThreadFactory( 041 name, priority, deamon)); 042 } 043 044 public UJMPThreadPoolExecutor(String name, int corePoolSize, int maximumPoolSize) { 045 this(name, corePoolSize, maximumPoolSize, 500L, TimeUnit.MILLISECONDS, 046 new LinkedBlockingQueue<Runnable>()); 047 } 048 049 public UJMPThreadPoolExecutor(String name, int corePoolSize, int maximumPoolSize, 050 long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue) { 051 this(name, maximumPoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, 052 Thread.NORM_PRIORITY, true); 053 } 054 055 public static final ThreadPoolExecutor getInstance() { 056 return getInstance(UJMPSettings.getNumberOfThreads()); 057 } 058 059 public static final ThreadPoolExecutor getInstance(final int maximumPoolSize) { 060 ThreadPoolExecutor es = executors.get(); 061 if (es == null) { 062 synchronized (executors) { 063 es = new UJMPThreadPoolExecutor(Thread.currentThread().getName(), 0, 064 maximumPoolSize); 065 executors.set(es); 066 } 067 } 068 return es; 069 } 070 071 }