builder.put(Constants.FESEN_USERNAME, username);
            builder.put(Constants.FESEN_PASSWORD, password);
        }
        final String authorities = fessConfig.getFesenHttpSslCertificateAuthorities();
        if (StringUtil.isNotBlank(authorities)) {
            builder.put("http.ssl.certificate_authorities", authorities);
        }
        return new HttpClient(builder.build(), null);
    }

    private NodeManager nodeManager;

    @PostConstruct
    public void init() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String authorities = fessConfig.getFesenHttpSslCertificateAuthorities();
        if (StringUtil.isNotBlank(authorities)) {
            if (logger.isDebugEnabled()) {
                logger.debug("Loading certificate_authorities: {}", authorities);
            }

            return value;
        }
        return get("elasticsearch.http.url");
    }

    String getSearchEngineHttpSslCertificateAuthorities();

    default String getFesenHttpSslCertificateAuthorities() {
        final String value = getSearchEngineHttpSslCertificateAuthorities();
        if (value != null) {
            return value;
        }

            builder.put(Constants.FESEN_USERNAME, username);
            builder.put(Constants.FESEN_PASSWORD, password);
        }
        final String authorities = fessConfig.getFesenHttpSslCertificateAuthorities();
        if (StringUtil.isNotBlank(authorities)) {
            builder.put("http.ssl.certificate_authorities", authorities);
        }
        return new HttpClient(builder.build(), null);
    }