content: /*
   * 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 io.airlift.openmetrics.types;
  
  import io.airlift.stats.CounterStat;
  
  import java.util.Map;
  
  import static java.util.Objects.requireNonNull;
  
  public record Counter(String metricName, long value, Map<String, String> labels, String help)
          implements Metric
  {
      public Counter(String metricName, long value, Map<String, String> labels, String help)
      {
          this.metricName = requireNonNull(metricName, "metricName is null");
          this.value = value;
          this.labels = labels;
          this.help = help;
      }
  
      public static Counter from(String metricName, CounterStat counterStat, Map<String, String> labels, String help)
      {
          return new Counter(metricName, counterStat.getTotalCount(), labels, help);
      }
  
      @Override
      public String getMetricExposition()
      {
          return Metric.formatSingleValuedMetric(metricName, "counter", help, labels, Long.toString(value));
      }
  }
  