```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);

public class MemoryDataHelper {
    /** Map of session IDs to URL queues for managing crawling queues. */
    protected volatile Map<String, Queue<UrlQueueImpl<Long>>> urlQueueMap = new HashMap<>();

    /** Map of session IDs to access result maps for storing crawling results. */
    protected volatile Map<String, Map<String, AccessResultImpl<Long>>> sessionMap = new HashMap<>();

    /** Map of session IDs to include URL patterns for filtering URLs. */

     * Gets the count of access results for the specified session.
     *
     * @param sessionId the session ID
     * @return the count of access results
     */
    @Override
    public int getCount(final String sessionId) {
        return dataHelper.getAccessResultMap(sessionId).size();
    }

    /**
     * Deletes all access results for the specified session.
     *
     * @param sessionId the session ID

     */
    public void setId(final String id) {
        this.id = id;
    }

    /**
     * Returns 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;
    }

 * Provides methods for adding, retrieving, and managing URLs within a crawling session.
 *
 * @param <QUEUE> the type of URL queue
 */
public interface UrlQueueService<QUEUE extends UrlQueue<?>> {

    /**
     * Updates the session ID.
     *
     * @param oldSessionId The old session ID.
     * @param newSessionId The new session ID.
     */
    void updateSessionId(String oldSessionId, String newSessionId);

                }
            }
        }
        return ret;
    }

    /**
     * Generates URL queue entries for a new session based on access results from a previous session.
     *
     * @param previousSessionId The previous session ID.
     * @param sessionId The new session ID.
     */
    @Override
    public void generateUrlQueues(final String previousSessionId, final String sessionId) {

    }

    /**
     * Test multiple initializations with different session IDs
     */
    public void test_multipleInit_differentSessionIds() {
        // First session
        urlFilter.init("session-001");
        urlFilter.addInclude("https://first.com/.*");

        // Second session
        urlFilter.init("session-002");
        urlFilter.addInclude("https://second.com/.*");

    /**
     * Returns the count of access results for the given session ID.
     *
     * @param sessionId the session ID
     * @return the count of access results
     */
    int getCount(String sessionId);

    /**
     * Deletes access results for the given session ID.
     *
     * @param sessionId the session ID
     */
    void delete(String sessionId);

    /**

     *
     * @param sessionId the ID of the session for which the URL filter is being added
     * @param url the URL to be excluded
     */
    void addExcludeUrlFilter(String sessionId, String url);

    /**
     * Adds a list of URLs to be excluded from crawling for a specific session.
     *
     * @param sessionId the ID of the session for which the URLs should be excluded

     *
     * @param id the identifier
     */
    void setId(IDTYPE id);

    /**
     * Returns the session identifier.
     *
     * @return the session identifier
     */
    String getSessionId();

    /**
     * Sets the session identifier.
     *
     * @param sessionId the session identifier
     */
    void setSessionId(String sessionId);

    /**
     * Returns the rule identifier.
     *