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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.hadoop.metrics2.lib;
20  
21  import java.util.concurrent.atomic.AtomicLongArray;
22  
23  import org.apache.hadoop.hbase.classification.InterfaceAudience;
24  
25  /**
26   * Extended histogram implementation with counters for metric size ranges.
27   */
28  @InterfaceAudience.Private
29  public class MetricMutableSizeHistogram extends MetricMutableRangeHistogram {
30    private final String rangeType = "SizeRangeCount";
31    private final long[] ranges = {10,100,1000,10000,100000,1000000,10000000,100000000};
32    private final AtomicLongArray rangeVals = new AtomicLongArray(getRange().length+1);
33    
34    public MetricMutableSizeHistogram(String name, String description) {
35      super(name, description);
36    }
37    
38    @Override
39    public String getRangeType() {
40      return rangeType;
41    }
42  
43    @Override
44    public long[] getRange() {
45      return ranges;
46    }
47    
48    @Override
49    public AtomicLongArray getRangeVals() {
50      return rangeVals;
51    }  
52  }