// Setup
        String session1 = "session1";
        String session2 = "session2";

        // Add filters for both sessions
        service.addIncludeUrlFilter(session1, "https://session1.com/.*");
        service.addIncludeUrlFilter(session2, "https://session2.com/.*");

        // Delete only session1
        service.delete(session1);

        // Verify only session1 was cleared

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        MockitoAnnotations.openMocks(this);
    }

    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

    }

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

        String sessionId = "session123";
        result.setSessionId(sessionId);
        assertEquals(sessionId, result.getSessionId());
    }

    public void test_ruleIdGetterSetter() {
        // Test rule ID getter/setter

        data.setUrl("https://example.com/page");
        data.setHttpStatusCode(200);
        data.setMethod("GET");
        data.setParentUrl("https://example.com");
        data.setSessionId("session123");
        data.setRuleId("rule456");
        data.setMimeType("text/html");
        data.setCharSet("UTF-8");
        data.setContentLength(2048L);
        data.setExecutionTime(500L);

                .actionGet()
                .getHits()
                .getTotalHits()
                .value() > 0);

        // Delete session1
        urlFilterService.delete(sessionId1);

        // Verify session1 is deleted but session2 remains
        assertEquals(0,
                fesenClient.prepareSearch("fess_crawler.filter")

```java
// Create multiple crawler instances
Crawler crawler1 = container.getComponent("crawler");
crawler1.setSessionId("session1");
crawler1.addUrl("https://site1.com");

Crawler crawler2 = container.getComponent("crawler");  
crawler2.setSessionId("session2");
crawler2.addUrl("https://site2.com");

// Execute concurrently
crawler1.setBackground(true);
crawler2.setBackground(true);