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 com.alibaba.jstorm.common.metric.codahale;
  
  import com.codahale.metrics.*;
  
  /**
   * @author wange
   * @since 2.1.1
   */
  public class JHistogram implements Metric, Sampling, Counting {
      private final Reservoir reservoir;
      private final LongAdder count;
  
      /**
       * Creates a new {@link Histogram} with the given reservoir.
       *
       * @param reservoir the reservoir to create a histogram from
       */
      public JHistogram(Reservoir reservoir) {
          this.reservoir = reservoir;
          this.count = new LongAdder();
      }
  
      /**
       * Adds a recorded value.
       *
       * @param value the length of the value
       */
      public void update(int value) {
          update((long) value);
      }
  
      /**
       * Adds a recorded value.
       *
       * @param value the length of the value
       */
      public void update(long value) {
          count.increment();
          reservoir.update(value);
      }
  
      /**
       * Returns the number of values recorded.
       *
       * @return the number of values recorded
       */
      @Override
      public long getCount() {
          return count.sum();
      }
  
      @Override
      public Snapshot getSnapshot() {
          return reservoir.getSnapshot();
      }
  }
  