public static final String DEFAULT_PURGE_DAY = "-1";

    public static final String DEFAULT_SUGGEST_PURGE_DAY = "30";

    public static final String DEFAULT_PURGE_BY_BOTS =
            "Crawler,crawler,Bot,bot,Slurp,Yeti,Baidu,Steeler,ichiro,hotpage,Feedfetcher,ia_archiver,Y!J-BRI,Google Desktop,Seznam,Tumblr,YandexBot,Chilkat,CloudFront,Mediapartners,MSIE 6";

    }

    default void setPurgeByBots(final String value) {
        setSystemProperty(Constants.PURGE_BY_BOTS_PROPERTY, value);
    }

    default String getPurgeByBots() {
        return getSystemProperty(Constants.PURGE_BY_BOTS_PROPERTY, Constants.DEFAULT_PURGE_BY_BOTS);
    }

    default boolean hasNotification() {

    /** The key of the message: Purge User Before */
    public static final String LABELS_purge_user_info_day = "{labels.purge_user_info_day}";

    /** The key of the message: Bots Name For Purge */
    public static final String LABELS_purge_by_bots = "{labels.purge_by_bots}";

    /** The key of the message: Log Level */
    public static final String LABELS_log_level = "{labels.log_level}";

    /** The key of the configuration. e.g. content */
    String INDEX_FIELD_CONTENT = "index.field.content";

    /** The key of the configuration. e.g. content_minhash_bits */
    String INDEX_FIELD_content_minhash_bits = "index.field.content_minhash_bits";

    /** The key of the configuration. e.g. cache */
    String INDEX_FIELD_CACHE = "index.field.cache";

    /** The key of the configuration. e.g. digest */

            // setup path mapping
            final List<String> ptList = new ArrayList<>();
            ptList.add(Constants.PROCESS_TYPE_CRAWLING);
            ptList.add(Constants.PROCESS_TYPE_BOTH);
            pathMappingHelper.setPathMappingList(options.sessionId, pathMappingService.getPathMappingList(ptList));

            // duplicate host
            try {