code: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.skywalking.oap.server.telemetry.prometheus;
  
  import io.prometheus.client.Counter;
  import org.apache.skywalking.oap.server.telemetry.api.CounterMetrics;
  import org.apache.skywalking.oap.server.telemetry.api.MetricsTag;
  
  /**
   * Counter metrics in Prometheus implementor.
   */
  public class PrometheusCounterMetrics extends BaseMetrics<Counter, Counter.Child> implements CounterMetrics {
  
      public PrometheusCounterMetrics(String name, String tips, MetricsTag.Keys labels, MetricsTag.Values values) {
          super(name, tips, labels, values);
      }
  
      @Override
      public void inc() {
          Counter.Child metrics = this.getMetric();
          if (metrics != null) {
              metrics.inc();
          }
      }
  
      @Override
      public void inc(double value) {
          Counter.Child metrics = this.getMetric();
          if (metrics != null) {
              metrics.inc(value);
          }
      }
  
      @Override
      protected Counter create(String[] labelNames) {
          return Counter.build().name(name).help(tips).labelNames(labelNames).register();
      }
  }
  