protected long crawlerWaitMillis = 10000;

    protected List<IntervalRule> ruleList = new ArrayList<>();

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

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