content: /*
   * 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.kafka.common.metrics.stats;
  
  import org.apache.kafka.common.metrics.MeasurableStat;
  import org.apache.kafka.common.metrics.MetricConfig;
  
  /**
   * An non-sampled cumulative total maintained over all time.
   * This is a non-sampled version of {@link WindowedSum}.
   *
   * See also {@link CumulativeCount} if you just want to increment the value by 1 on each recording.
   */
  public class CumulativeSum implements MeasurableStat {
  
      private double total;
  
      public CumulativeSum() {
          total = 0.0;
      }
  
      public CumulativeSum(double value) {
          total = value;
      }
  
      @Override
      public void record(MetricConfig config, double value, long now) {
          total += value;
      }
  
      @Override
      public double measure(MetricConfig config, long now) {
          return total;
      }
  
      @Override
      public String toString() {
          return "CumulativeSum(total=" + total + ")";
      }
  }
  