}

    public void test_add() {
        // Setup
        String sessionId = "session123";
        String url = "https://example.com/page";
        Queue<UrlQueueImpl<Long>> mockQueue = new LinkedList<>();

        when(dataHelper.getUrlQueueList(sessionId)).thenReturn(mockQueue);

        // Execute
        service.add(sessionId, url);

        // Verify
        assertEquals(1, mockQueue.size());

        // Second poll should return null (queue is empty)
        final OpenSearchUrlQueue polled2 = urlQueueService.poll(sessionId);
        assertNull(polled2);

        urlQueueService.delete(sessionId);
    }

    public void test_poll_multipleItemsTx() {
        final String sessionId = "poll_session3";
        final List<OpenSearchUrlQueue> urlQueueList = new ArrayList<>();

     * Supports sequential (default) and random ordering based on crawling configuration.
     *
     * @param sessionId the crawling session identifier
     * @return list of URL queue entries for processing
     */
    @Override
    protected List<OpenSearchUrlQueue> fetchUrlQueueList(final String sessionId) {
        final CrawlingConfigHelper crawlingConfigHelper = ComponentUtil.getCrawlingConfigHelper();

     *
     * @param sessionId The session ID.
     * @param url The URL to add.
     */
    @Override
    public void add(final String sessionId, final String url) {
        if (exists(sessionId, url)) {
            return;
        }
        final OpenSearchUrlQueue urlQueue = new OpenSearchUrlQueue();
        urlQueue.setSessionId(sessionId);
        urlQueue.setUrl(url);

    /**
     * Offers all URL queues.
     *
     * @param sessionId The session ID.
     * @param newUrlQueueList The list of new URL queues.
     */
    void offerAll(String sessionId, List<QUEUE> newUrlQueueList);

    /**
     * Polls a URL queue.
     *
     * @param sessionId The session ID.
     * @return The URL queue.
     */
    QUEUE poll(String sessionId);

    /**
     * Saves the session.
     *

            public void offerAll(String sessionId, List<UrlQueue<?>> newUrlQueueList) {
            }

            @Override
            public UrlQueue<?> poll(String sessionId) {
                return null;
            }

            @Override
            public void saveSession(String sessionId) {
            }

            @Override
            public boolean visited(UrlQueue<?> urlQueue) {

    public void setSessionId_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda) {
        setSessionId_Terms("sessionId", opLambda, null);
    }

    public void setSessionId_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda, OperatorCall<BsCrawlingInfoCA> aggsLambda) {
        setSessionId_Terms("sessionId", opLambda, aggsLambda);
    }

        if (sessionId == null) { // create session id
            sessionId = RandomStringUtils.randomAlphabetic(15);
        }
        resultBuf.append("Session Id: ").append(sessionId).append("\n");
        if (jobExecutor != null) {
            jobExecutor.addShutdownListener(() -> ComponentUtil.getProcessHelper().destroyProcess(sessionId));
        }

     * @param sessionId The session ID.
     */
    @Override
    public void delete(final String sessionId) {
        deleteBySessionId(sessionId);
        includeFilterCache.invalidate(sessionId);
        excludeFilterCache.invalidate(sessionId);
    }

    /**
     * Gets the list of include URL patterns for the specified session.
     *
     * @param sessionId The session ID.

     * @return The session ID.
     */
    public String getSessionId() {
        return sessionId;
    }

    /**
     * Sets the session ID.
     * @param sessionId The session ID.
     */
    public void setSessionId(final String sessionId) {
        this.sessionId = sessionId;
    }

    /**
     * Returns the active thread count.
     * @return The active thread count.
     */