content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.nacos.client.monitor;
  
  import io.prometheus.client.Counter;
  import io.prometheus.client.Gauge;
  import io.prometheus.client.Histogram;
  
  /**
   * Metrics Monitor.
   *
   * @author Nacos
   */
  public class MetricsMonitor {
      
      private static final Gauge NACOS_MONITOR_GAUGE = Gauge.build().name("nacos_monitor").labelNames("module", "name")
              .help("nacos_monitor").register();
      
      private static final Histogram NACOS_CLIENT_REQUEST_HISTOGRAM = Histogram.build()
              .labelNames("module", "method", "url", "code").name("nacos_client_request").help("nacos_client_request")
              .register();
      
      private static final Counter NACOS_CLIENT_NAMING_REQUEST_FAILED_TOTAL = Counter.build()
              .name("nacos_client_naming_request_failed_total").help("nacos_client_naming_request_failed_total")
              .labelNames("module", "req_class", "res_status", "res_code", "err_class").register();
      
      public static Gauge.Child getServiceInfoMapSizeMonitor() {
          return NACOS_MONITOR_GAUGE.labels("naming", "serviceInfoMapSize");
      }
      
      public static Gauge.Child getListenConfigCountMonitor() {
          return NACOS_MONITOR_GAUGE.labels("config", "listenConfigCount");
      }
      
      public static Histogram.Child getConfigRequestMonitor(String method, String url, String code) {
          return NACOS_CLIENT_REQUEST_HISTOGRAM.labels("config", method, url, code);
      }
      
      public static Histogram.Child getNamingRequestMonitor(String method, String url, String code) {
          return NACOS_CLIENT_REQUEST_HISTOGRAM.labels("naming", method, url, code);
      }
      
      public static Counter.Child getNamingRequestFailedMonitor(String reqClass, String resStatus, String resCode,
              String errClass) {
          return NACOS_CLIENT_NAMING_REQUEST_FAILED_TOTAL.labels("naming", reqClass, resStatus, resCode, errClass);
      }
  }
  
  