org.mule.routing.EventProcessingThread.java Source code

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Here is the source code for org.mule.routing.EventProcessingThread.java

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/*
 * $Id$
 * --------------------------------------------------------------------------------------
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 *
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.routing;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * A thread that detects and processes events.
 */
public abstract class EventProcessingThread extends Thread {
    protected final Log logger = LogFactory.getLog(EventProcessingThread.class);

    protected volatile boolean stopRequested;
    protected long delayTime;
    protected Object lock = new Object();

    public EventProcessingThread(String name, long delayTime) {
        setName(name);
        this.delayTime = delayTime;
    }

    public void processNow() {
        synchronized (lock) {
            lock.notifyAll();
        }
    }

    /**
     * Stops the monitoring of the expired groups.
     */
    public void stopProcessing() {
        logger.debug("Stopping expiring group monitoring");
        stopRequested = true;
        processNow();

        try {
            this.join();
        } catch (InterruptedException e) {
            // Ignoring
        }
    }

    protected boolean delay(long timeToDelay) {
        try {
            synchronized (lock) {
                lock.wait(timeToDelay);
            }
        } catch (InterruptedException e) {
            return true;
        }
        return false;
    }

    public final void run() {
        while (true) {
            if (stopRequested) {
                logger.debug("Received request to stop processing events");
                break;
            }
            doRun();
            if (delay(delayTime)) {
                break;
            }
        }

        logger.debug("Expiring group monitoring fully stopped");
    }

    /**
     * Detect and process events
     */
    protected abstract void doRun();

}