}
        }

        @Override
        protected void delayForWaitingNewUrl() {
            waitNewUrlCount++;
            if (shouldThrowException) {
                throw new RuntimeException("Test exception in delayForWaitingNewUrl");
            }
        }

        void reset() {
            beforeProcessingCount = 0;
            afterProcessingCount = 0;

    }

    /**
     * Test delayForWaitingNewUrl with default delay
     */
    public void test_delayForWaitingNewUrl_defaultDelay() {
        final DefaultIntervalController controller = new DefaultIntervalController();

        final long start = System.nanoTime();
        controller.delayForWaitingNewUrl();
        final long elapsed = (System.nanoTime() - start) / 1000000;

 *   <li>After processing a URL ({@link #delayAfterProcessing()})</li>
 *   <li>When there are no URLs in the queue ({@link #delayAtNoUrlInQueue()})</li>
 *   <li>While waiting for new URLs to be added to the queue ({@link #delayForWaitingNewUrl()})</li>
 * </ul>
 *
 * <p>
 * Subclasses are responsible for implementing the abstract methods to define the actual delay
 * mechanism for each of these stages.
 * </p>
 *
 * <p>

     * All operations are wrapped in exception handling to ensure robustness
     * in test and production environments.
     */
    @Override
    protected void delayForWaitingNewUrl() {
        try {
            ComponentUtil.getSystemHelper().calibrateCpuLoad();
        } catch (final Exception e) {
            if (logger.isDebugEnabled()) {

            ThreadUtil.sleep(delayMillisBeforeProcessing);
        }
    }

    /**
     * Delays for waiting for new URLs.
     */
    @Override
    protected void delayForWaitingNewUrl() {
        if (delayMillisForWaitingNewUrl > 0) {
            ThreadUtil.sleep(delayMillisForWaitingNewUrl);
        }
    }

    /**
     * Gets the delay in milliseconds after processing a URL.

        public void delayBeforeProcessing() {
        }

        public void delayAfterProcessing() {
        }

        public void delayAtNoUrlInQueue() {
        }

        public void delayForWaitingNewUrl() {
        }
    }

    /**
     * Test default constructor
     */
    public void test_constructor() {
        CrawlerContext context = new CrawlerContext();
        assertNotNull(context);