while (!crawlerRunning) {
            ThreadUtil.sleepQuietly(crawlerWaitMillis);
        }
    }

    public void delayByRules() {
        final long delay = getDelay();
        if (delay > 0) {
            ThreadUtil.sleep(delay);
        }
    }

    protected long getDelay() {
        if (ruleList.isEmpty()) {
            return 0;
        }
        final Calendar cal = getCurrentCal();

  }

  @Override
  public final ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) {
    return delegate.schedule(wrapTask(command), delay, unit);
  }

  @Override
  public final <V extends @Nullable Object> ScheduledFuture<V> schedule(
      Callable<V> task, long delay, TimeUnit unit) {
    return delegate.schedule(wrapTask(task), delay, unit);
  }

  @Override
  public final ScheduledFuture<?> scheduleAtFixedRate(

     * @param {string} options.prefix - Prefix to use for data attributes.
     * @param {number} options.startDelay - Delay before animation, in ms.
     * @param {number} options.typeDelay - Delay between each typed character, in ms.
     * @param {number} options.lineDelay - Delay between each line, in ms.
     * @param {number} options.progressLength - Number of characters displayed as progress bar.

            long delay;

            do {
                delay = 2L;

                synchronized (t) {
                    long expire = t.ltime + t.delay;
                    long ctime = System.currentTimeMillis();

                    if (expire > ctime)
                        delay = expire - ctime;
                }

if (delay > 2)
System.out.println("delay=" + delay);

      delay(SMALL_DELAY_MS);
      return Boolean.TRUE;
    }
  }

  public class MediumRunnable extends CheckedRunnable {
    @Override
    protected void realRun() throws Throwable {
      delay(MEDIUM_DELAY_MS);
    }
  }

  public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
    @Override
    protected void realRun() throws InterruptedException {
      delay(MEDIUM_DELAY_MS);

      delay(SMALL_DELAY_MS);
      return Boolean.TRUE;
    }
  }

  public class MediumRunnable extends CheckedRunnable {
    @Override
    protected void realRun() throws Throwable {
      delay(MEDIUM_DELAY_MS);
    }
  }

  public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
    @Override
    protected void realRun() throws InterruptedException {
      delay(MEDIUM_DELAY_MS);

User-agent: FessCrawler
Disallow:           # allows all 

User-agent: BruteBot
Disallow: /
Allow: /foo/bar/
Crawl-delay: 1314000

# welcome!
User-agent: Googlebot
Crawl-delay: 1

User-agent: *
Disallow: /private/
Disallow: /help        # disallows /help.html, /help/index.html, etc.
Allow: /help/faq.html
Crawl-delay: 3

User-agent: Crawler
Disallow: /aaa

User-agent: Crawler/1.0
Disallow: /bbb

	lastObject := ri.Object

	retryAttempts := job.KeyRotate.Flags.Retry.Attempts
	if retryAttempts <= 0 {
		retryAttempts = batchKeyRotateJobDefaultRetries
	}
	delay := job.KeyRotate.Flags.Retry.Delay
	if delay <= 0 {
		delay = batchKeyRotateJobDefaultRetryDelay
	}

	rnd := rand.New(rand.NewSource(time.Now().UnixNano()))

	selectObj := func(info FileInfo) (ok bool) {

 * task should not be executed again. Otherwise it returns a delay until the next execution.
 *
 * A task has at most one next execution. If the same task instance is scheduled multiple times, the
 * earliest one wins. This applies to both executions scheduled with [TaskRunner.Queue.schedule] and
 * those implied by the returned execution delay.
 *
 * Cancellation
 * ------------
 *

	delay := env.Get(EnvDelayLegacy, "")
	if delay == "" {
		delay = env.Get(EnvDelay, kvs.GetWithDefault(Delay, DefaultKVS))
	}
	cfg.Delay, err = strconv.ParseFloat(delay, 64)
	if err != nil {
		return err
	}
	maxWait := env.Get(EnvMaxWaitLegacy, "")
	if maxWait == "" {
		maxWait = env.Get(EnvMaxWait, kvs.GetWithDefault(MaxWait, DefaultKVS))
	}
	cfg.MaxWait, err = time.ParseDuration(maxWait)
	if err != nil {
		return err