com.alachisoft.ncache.common.caching.statistics.customcounters.FlipManager Maven / Gradle / Ivy

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package com.alachisoft.ncache.common.caching.statistics.customcounters;

/**
 * @author Muneeb Shahid
 */
public class FlipManager implements Runnable {

    private static final Object mutex = new Object();
    static long timeLapse;
    static InstantaneousFlip flip;
    static Thread flipManagerThread;
    private static boolean isStarted;
    private static int refCount;

    static {
        flip = new InstantaneousFlip(0);
        timeLapse = 1000; //1sec
        isStarted = false;
    }

    static void timerElapsed(Object sender) {
        flip.increment();
    }

    public static InstantaneousFlip getFlip() {
        return flip;
    }

    public static void Stop() {

        synchronized (mutex) {
            if (refCount > 0) {
                refCount--;
                if (refCount == 0) {
                    isStarted = false;
                    if (flipManagerThread != null && flipManagerThread.isAlive()) {
                        flipManagerThread.interrupt();
                    }
                }
            }
        }
    }


    public static void Start() {
        synchronized (mutex) {
            if (flipManagerThread == null) {
                isStarted = true;
                flipManagerThread = new Thread(new FlipManager());
                flipManagerThread.setDaemon(true);
                flipManagerThread.setName("FlipManager");
                flipManagerThread.start();
            }

            refCount++;
        }
    }


    @Override
    public void run() {
        if (!isStarted) {
            return;
        }
        while (isStarted) {
            FlipManager.timerElapsed(this);
            try {
                Thread.sleep(timeLapse);
            } catch (InterruptedException interruptedException) {
                isStarted = false;
            }
        }
    }
}