```xml
<dependency>
    <groupId>org.codelibs.fess</groupId>
    <artifactId>fess-crawler</artifactId>
    <version>15.2.0-SNAPSHOT</version>
</dependency>

<!-- For LastaFlute DI integration -->
<dependency>
    <groupId>org.codelibs.fess</groupId>
    <artifactId>fess-crawler-lasta</artifactId>
    <version>15.2.0-SNAPSHOT</version>
</dependency>

<!-- For OpenSearch backend -->
<dependency>
    <groupId>org.codelibs.fess</groupId>

            crawler.crawlerContext.setNumOfThread(numOfThread);
            crawler.urlFilter.addInclude(url + ".*");
            final String sessionId = crawler.execute();
            assertEquals(maxCount, dataService.getCount(sessionId));
            dataService.delete(sessionId);
        } finally {
            server.stop();
        }
    }

    public void test_execute_xmlSitemaps() throws Exception {

    public void test_processUrl_emptyUrl() {
        String sessionId = "test-session-014";
        urlFilter.init(sessionId);

        urlFilter.processUrl("");
        // Should handle empty URL gracefully
        assertNotNull(urlFilter);
    }

    /**
     * Test clear method
     */
    public void test_clear() {
        String sessionId = "test-session-015";
        urlFilter.init(sessionId);

        return crawlerContext.sessionId;
    }

    /**
     * Sets the session ID.
     * If the new session ID is different from the current one, it updates the session ID in the URL queue service.
     * @param sessionId The new session ID.
     */
    public void setSessionId(final String sessionId) {
        if (StringUtil.isNotBlank(sessionId) && !sessionId.equals(crawlerContext.sessionId)) {

     *
     * @param sessionId The session ID of the document.
     * @param url The URL of the document.
     * @return true if the document exists, false otherwise.
     * @throws OpenSearchAccessException if the existence check fails.
     */
    protected boolean exists(final String sessionId, final String url) {
        final String id = getId(sessionId, url);
        try {

        server.start();

        final String url = "http://localhost:7070/hoge.html";
        try {
            final CrawlerContext crawlerContext = new CrawlerContext();
            final String sessionId = "id1";
            urlFilter.init(sessionId);
            crawlerContext.setUrlFilter(urlFilter);
            CrawlingParameterUtil.setCrawlerContext(crawlerContext);
            httpClient.init();
            httpClient.processRobotsTxt(url);

     *
     * @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);

            crawler.crawlerContext.setNumOfThread(numOfThread);
            crawler.urlFilter.addInclude(url + ".*");
            final String sessionId = crawler.execute();
            assertEquals(maxCount, dataService.getCount(sessionId));
            dataService.delete(sessionId);
        } finally {
            server.stop();
        }
    }

    public void test_execute_xmlSitemaps() throws Exception {

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

    /**
     * Gets an access result by session ID and URL.
     *
     * @param sessionId The session ID.
     * @param url The URL.
     * @return The access result, or null if not found.
     */
    @Override

     */
    public String getSessionId() {
        return sessionId;
    }

    /**
     * Sets the session ID associated with this crawling session.
     *
     * @param sessionId the session ID to set
     */
    public void setSessionId(final String sessionId) {
        this.sessionId = sessionId;
    }

    /**
     * Gets the execution time for processing this response.