Examples of reactor.timer.HashWheelTimer

reactor.timer.HashWheelTimer
s.columbia.edu/~nahum/w6998/papers/ton97-timing-wheels.pdf More comprehensive slides, explaining the paper can be found here: http://www.cse.wustl.edu/~cdgill/courses/cs6874/TimingWheels.ppt Hash Wheel timer is an approximated timer that allows performant execution of larger amount of tasks with better performance compared to traditional scheduling. @author Oleksandr Petrov

   * @return the timer.
   */
  public Timer getTimer() {
    if (null == timer.get()) {
      synchronized (timer) {
        Timer t = new HashWheelTimer();
        if (!timer.compareAndSet(null, t)) {
          t.cancel();
        }
      }
    }
    return timer.get();
  }

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