try {
            switch (type) {
            case PRE_PROCESSING:
                delayBeforeProcessing();
                break;
            case POST_PROCESSING:
                delayAfterProcessing();
                break;
            case NO_URL_IN_QUEUE:
                delayAtNoUrlInQueue();
                break;
            case WAIT_NEW_URL:
                delayForWaitingNewUrl();

        }

    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.interval.impl.AbstractIntervalController#
     * delayAfterProcessing()
     */
    @Override
    protected void delayAfterProcessing() {
        if (delayMillisAfterProcessing > 0) {
            ThreadUtil.sleep(delayMillisAfterProcessing);
        }
    }

    /*
     * (non-Javadoc)
     *