private LanguageHelper languageHelper;
    private FessConfig fessConfig;
    private SearchEngineClient searchEngineClient;
    private DataService<OpenSearchAccessResult> dataService;
    private UrlQueueService<OpenSearchUrlQueue> urlQueueService;
    private UrlFilterService urlFilterService;
    private ClickLogBhv clickLogBhv;
    private FavoriteLogBhv favoriteLogBhv;
    private IngestFactory ingestFactory;

    @Override

        } catch (final Exception e) {
            logger.warn("Failed to delete UrlFilter: sessionId={}", sid, e);
        }

        try {
            // clear queue
            urlQueueService.clearCache();
            urlQueueService.delete(sid);
        } catch (final Exception e) {
            logger.warn("Failed to delete UrlQueue: sessionId={}", sid, e);
        }

        try {
            // clear