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();
        final String proxyHost = fessConfig.getHttpProxyHost();

                        paramMap.remove(Param.Client.PROXY_USERNAME).toString(), paramMap.remove(Param.Client.PROXY_PASSWORD).toString()));
            }
        } else {
            initializeDefaultHttpProxy(paramMap);
        }

        crawlerClientFactory = factory;
        return factory;
    }

    @Override
    public Map<String, String> getConfigParameterMap(final ConfigName name) {

                factoryParamMap.put(HcHttpClient.PROXY_CREDENTIALS_PROPERTY, new UsernamePasswordCredentials(proxyUsername, proxyPassword));
            }
        } else {
            initializeDefaultHttpProxy(factoryParamMap);
        }

        // file auth
        final String fileAuthStr = paramMap.get(CRAWLER_FILE_AUTH);
        if (StringUtil.isNotBlank(fileAuthStr)) {