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.cassandra.metrics;
  
  import com.google.common.annotations.VisibleForTesting;
  
  
  /**
   * Adds ability to reset a histogram
   */
  public class ClearableHistogram extends ThreadLocalHistogram
  {
      private final DecayingEstimatedHistogramReservoir reservoirRef;
  
      /**
       * Creates a new {@link com.codahale.metrics.Histogram} with the given reservoir.
       *
       * @param reservoir the reservoir to create a histogram from
       */
      public ClearableHistogram(DecayingEstimatedHistogramReservoir reservoir)
      {
          super(reservoir);
  
          this.reservoirRef = reservoir;
      }
  
      @VisibleForTesting
      public void clear()
      {
          clearCount();
          reservoirRef.clear();
      }
  
      private void clearCount()
      {
          reset();
      }
  }
  