.header("Accept", "application/json")
                .execute()) {
            final Map<String, Object> contentMap = response.getContent(OpenSearchCurl.jsonParser());
            if (logger.isDebugEnabled()) {
                logger.debug("response={}", contentMap);
            }
            if (contentMap.containsKey("value")) {
                @SuppressWarnings("unchecked")

                if (response.getHttpStatusCode() == 200) {
                    final Map<String, Object> contentMap = response.getContent(OpenSearchCurl.jsonParser());
                    final Object count = contentMap.get("count");
                    if (count instanceof Number) {
                        return ((Number) count).longValue();
                    }