}

    /**
     * Sets the delay time in milliseconds after processing a URL.
     *
     * @param delayMillisAfterProcessing the delay time in milliseconds after processing
     */
    public void setDelayMillisAfterProcessing(final long delayMillisAfterProcessing) {
        this.delayMillisAfterProcessing = delayMillisAfterProcessing;
    }

    /**
     * Gets the delay time in milliseconds when there are no URLs in the queue.