public List collect()

in hertzbeat-collector/hertzbeat-collector-basic/src/main/java/org/apache/hertzbeat/collector/collect/prometheus/PrometheusAutoCollectImpl.java [81:140]
60 lines of code
10 McCabe index (conditional complexity)

    public List<CollectRep.MetricsData> collect(CollectRep.MetricsData.Builder builder,
                                                Metrics metrics) {
        try {
            validateParams(metrics);
        } catch (Exception e) {
            builder.setCode(CollectRep.Code.FAIL);
            builder.setMsg(e.getMessage());
            return null;
        }
        HttpContext httpContext = createHttpContext(metrics.getPrometheus());
        HttpUriRequest request = createHttpRequest(metrics.getPrometheus());
        try (CloseableHttpResponse response =
             CommonHttpClient.getHttpClient().execute(request, httpContext)) {
            int statusCode = response.getStatusLine().getStatusCode();
            boolean isSuccessInvoke = defaultSuccessStatusCodes.contains(statusCode);
            log.debug("http response status: {}", statusCode);
            if (!isSuccessInvoke) {
                builder.setCode(CollectRep.Code.FAIL);
                builder.setMsg(NetworkConstants.STATUS_CODE + SignConstants.BLANK + statusCode);
                return null;
            }
            try {
                return parseResponseByPrometheusExporter(response.getEntity().getContent(), builder);
            } catch (Exception e) {
                log.info("parse error: {}.", e.getMessage(), e);
                builder.setCode(CollectRep.Code.FAIL);
                builder.setMsg("parse response data error:" + e.getMessage());
            }
        } catch (ClientProtocolException e1) {
            String errorMsg = CommonUtil.getMessageFromThrowable(e1);
            log.error(errorMsg);
            builder.setCode(CollectRep.Code.UN_CONNECTABLE);
            builder.setMsg(errorMsg);
        } catch (UnknownHostException e2) {
            String errorMsg = CommonUtil.getMessageFromThrowable(e2);
            log.info(errorMsg);
            builder.setCode(CollectRep.Code.UN_REACHABLE);
            builder.setMsg("unknown host:" + errorMsg);
        } catch (InterruptedIOException | ConnectException | SSLException e3) {
            String errorMsg = CommonUtil.getMessageFromThrowable(e3);
            log.info(errorMsg);
            builder.setCode(CollectRep.Code.UN_CONNECTABLE);
            builder.setMsg(errorMsg);
        } catch (IOException e4) {
            String errorMsg = CommonUtil.getMessageFromThrowable(e4);
            log.info(errorMsg);
            builder.setCode(CollectRep.Code.FAIL);
            builder.setMsg(errorMsg);
        } catch (Exception e) {
            String errorMsg = CommonUtil.getMessageFromThrowable(e);
            log.error(errorMsg, e);
            builder.setCode(CollectRep.Code.FAIL);
            builder.setMsg(errorMsg);
        } finally {
            if (request != null) {
                request.abort();
            }
        }
        return Collections.singletonList(builder.build());
    }