threadutils.java

来自「spam source codejasen-0.9jASEN - java An」· Java 代码 · 共 87 行

/*
 * @(#)ThreadUtils.java	8/01/2005
 *
 * Copyright (c) 2004,2005 jASEN.org
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in
 *      the documentation and/or other materials provided with the distribution.
 *
 *   3. The names of the authors may not be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 *
 *   4. Any modification or additions to the software must be contributed back
 *      to the project.
 *
 *   5. Any investigation or reverse engineering of source code or binary to
 *      enable emails to bypass the filters, and hence inflict spam and or viruses
 *      onto users who use or do not use jASEN could subject the perpetrator to
 *      criminal and or civil liability.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JASEN.ORG,
 * OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
package org.jasen.util;

import org.jasen.thread.StoppableThread;

/**
 * <p>
 * General thread utils.
 * </p>
 * @author Jason Polites
 */
public final class ThreadUtils {

    /**
     * 
     */
    public ThreadUtils() {
        super();
    }
    
    /**
     * Requests a stop on the thread and forces an interrupt if the thread did not die within the given timeout.
     * @param thread The thread to stop
     * @param timeout The time in milliseconds to wait for the thread to die
     * @return True if the thread died cleanly, or false if it needed to be interrupted
     */
    public static boolean forceFinish(StoppableThread thread, long timeout) {
        boolean clean = true;
        
        synchronized(thread) {
            thread.finish();
            
            try {
                thread.join(timeout);
            } catch (InterruptedException ignore) {}
            
            if(thread.isAlive()) {
                thread.interrupt();
                clean = false;
            }    
            
            thread.notifyAll();
        }

        return clean;
    }

}