void setUpFlusher() {
    final ScheduledExecutorService scheduler = AppExecutorUtil.getAppScheduledExecutorService();
    if (USE_GENTLE_FLUSHER) {
      myFlushingTask = new GentleIndexFlusher(scheduler);
      LOG.info("Using nice flusher for indexes");
    }
    else {
      myFlushingTask = new SimpleFlusher(scheduler);
      LOG.info("Using simple flusher for indexes");
    }
  }
void setUpFlusher()