private static final Logger logger = LogManager.getLogger(Crawler.class);

    private static final String WEB_FS_CRAWLING_PROCESS = "WebFsCrawler";

    private static final String DATA_CRAWLING_PROCESS = "DataStoreCrawler";

    private static AtomicBoolean running = new AtomicBoolean(false);

    private static Queue<String> errors = new ConcurrentLinkedQueue<>();

    @Resource