private IngestFactory ingestFactory = null;

    /**
     * Default constructor for IndexUpdater.
     * Initializes a new instance with default settings.
     */
    public IndexUpdater() {
        super();
    }

    /**
     * Initializes the IndexUpdater after dependency injection.
     * Sets up the ingest factory if available in the component container.
     */

        // Inject dependencies
        indexUpdater.searchEngineClient = searchEngineClient;
        indexUpdater.dataService = dataService;
        indexUpdater.urlQueueService = urlQueueService;
        indexUpdater.urlFilterService = urlFilterService;
        indexUpdater.clickLogBhv = clickLogBhv;
        indexUpdater.favoriteLogBhv = favoriteLogBhv;
        indexUpdater.systemHelper = systemHelper;

        }

        // run index update
        final IndexUpdater indexUpdater = ComponentUtil.getIndexUpdater();
        indexUpdater.setName("IndexUpdater");
        indexUpdater.setPriority(indexUpdaterPriority);
        indexUpdater.setSessionIdList(sessionIdList);
        indexUpdater.setDaemon(true);
        indexUpdater.setCrawlerList(crawlerList);
        getAvailableBoostDocumentRuleList().forEach(rule -> {

    private static final String DATA_SERVICE = "dataService";

    private static final String MESSAGE_MANAGER = "messageManager";

    private static final String INDEX_UPDATER = "indexUpdater";

    private static final String FILE_TYPE_HELPER = "fileTypeHelper";

    private static final String EXTRACTOR_FACTORY = "extractorFactory";