/**
     * Maximum number of URLs to access during crawling.
     */
    protected long maxAccessCount = Long.MAX_VALUE;

    /**
     * Interval time in milliseconds between crawling executions.
     */
    protected long crawlingExecutionInterval = Constants.DEFAULT_CRAWLING_EXECUTION_INTERVAL;

    /**
     * Thread priority for index updater operations.
     */

     * Stops the crawling process.
     * Sets the crawler status to DONE and interrupts all crawler threads.
     */
    public void stop() {
        if (logger.isInfoEnabled()) {
            logger.info("Stopping crawler: sessionId={}, status={}", crawlerContext.sessionId, crawlerContext.getStatus());
        }
        crawlerContext.setStatus(CrawlerStatus.DONE);
        try {
            if (crawlerThreadGroup != null) {

        final long execTime = systemHelper.getCurrentTimeAsLong() - startTime;
        crawlingInfoHelper.putToInfoMap(Constants.DATA_CRAWLING_EXEC_TIME, Long.toString(execTime));
        if (logger.isInfoEnabled()) {
            logger.info("[EXEC TIME] crawling time: {}ms", execTime);
        }

        crawlingInfoHelper.putToInfoMap(Constants.DATA_INDEX_EXEC_TIME, Long.toString(indexUpdateCallback.getExecuteTime()));

                } finally {
                    done.set(true);
                }
            }, Thread.currentThread().getName() + "-pdf");
            task.setDaemon(isDaemonThread);
            task.start();
            task.join(timeout);
            if (!done.get()) {
                for (int i = 0; i < 100 && !done.get(); i++) {
                    task.interrupt();

            final StatsKeyObject keyObj = paramMap.get(Constants.CRAWLER_STATS_KEY) instanceof final StatsKeyObject sko ? sko : null;

            final long maxAccessCount = getMaxAccessCount(paramMap, dataMap);
            final int maxDepth = getMaxDepth(paramMap, dataMap);
            long counter = 0;
            final Deque<CrawlRequest> requestQueue = new LinkedList<>();
            final Set<String> processedUrls = new HashSet<>();

        String sessionId = "session123";
        Queue<UrlQueueImpl<Long>> existingQueue = new LinkedList<>();
        Map<String, AccessResultImpl<Long>> accessResultMap = new HashMap<>();

        UrlQueueImpl<Long> newUrl1 = new UrlQueueImpl<>();
        newUrl1.setSessionId(sessionId);
        newUrl1.setUrl("https://example.com/new1");

        UrlQueueImpl<Long> newUrl2 = new UrlQueueImpl<>();
        newUrl2.setSessionId(sessionId);

        // Test ID getter/setter
        AccessResultImpl<Long> result = new AccessResultImpl<>();

        result.setId(123L);
        assertEquals(Long.valueOf(123L), result.getId());

        result.setId(null);
        assertNull(result.getId());
    }

    public void test_sessionIdGetterSetter() {
        // Test session ID getter/setter
        AccessResultImpl<Long> result = new AccessResultImpl<>();

    protected long delayMillisAfterProcessing = 0L;

    /** Delay in milliseconds when no URL is in the queue */
    protected long delayMillisAtNoUrlInQueue = 500L;

    /** Delay in milliseconds before processing a URL */
    protected long delayMillisBeforeProcessing = 0L;

    /** Delay in milliseconds for waiting for new URLs */
    protected long delayMillisForWaitingNewUrl = 1000L;

    /**

    public static final String READY = "ready";

    /** Status constant representing running state. */
    public static final String RUNNING = "running";

    /** Status constant representing done/completed state. */
    public static final String DONE = "done";

    /** Status constant representing successful operation. */
    public static final String OK = "ok";

    /** Status constant representing failed operation. */

     */
    @Override
    public void iterate(final String sessionId, final AccessResultCallback<AccessResultImpl<Long>> accessResultCallback) {
        final Map<String, AccessResultImpl<Long>> arMap = dataHelper.getAccessResultMap(sessionId);
        for (final Map.Entry<String, AccessResultImpl<Long>> entry : arMap.entrySet()) {
            accessResultCallback.iterate(entry.getValue());
        }
    }

    /**