return crawlingConfig.initializeClientFactory(creator);
    }

    @Override
    public Map<String, String> getConfigParameterMap(final ConfigName name) {
        return crawlingConfig.getConfigParameterMap(name);
    }

    String getConfigId();

    Integer getTimeToLive();

    CrawlerClientFactory initializeClientFactory(Supplier<CrawlerClientFactory> creator);

    Map<String, String> getConfigParameterMap(ConfigName name);

    default void initializeDefaultHttpProxy(final Map<String, Object> paramMap) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

            return new DigestScheme();
        }
        if (Constants.NTLM.equals(scheme)) {
            final Properties props = new Properties();
            getWebConfig().getConfigParameterMap(ConfigName.CONFIG).entrySet().stream()
                    .filter(e -> e.getKey().startsWith(Config.JCIFS_PREFIX)).forEach(e -> {
                        props.setProperty(e.getKey(), e.getValue());
                    });