} catch (final Exception e) {
                logger.warn("Failed to load certificate_authorities: path={}", authorities, e);
            }
        }

        final String[] hosts = split(ResourceUtil.getFesenHttpUrl(), ",")
                .get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).toArray(n -> new String[n]));

        if (value != null) {
            return value;
        }
        return get("elasticsearch.type");
    }

    String getSearchEngineHttpUrl();

    default String getFesenHttpUrl() {
        final String value = getSearchEngineHttpUrl();
        if (value != null) {
            return value;
        }
        return get("elasticsearch.http.url");
    }

            switch (fessConfig.getFesenType()) {
            case Constants.FESEN_TYPE_CLOUD:
            case Constants.FESEN_TYPE_AWS:
                httpAddress = org.codelibs.fess.util.ResourceUtil.getFesenHttpUrl();
                break;
            default:
                runner = new OpenSearchRunner();
                final Configs config = newConfigs().clusterName(clusterName).numOfNode(1).useLogger();