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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  import org.apache.hadoop.metrics2.MetricsInfo;
25  
26  /**
27   * Extended histogram implementation with counters for metric size ranges.
28   */
29  @InterfaceAudience.Private
30  public class MutableSizeHistogram extends MutableRangeHistogram {
31    private final String rangeType = "SizeRangeCount";
32    private final long[] ranges = {10,100,1000,10000,100000,1000000,10000000,100000000};
33    private final AtomicLongArray rangeVals = new AtomicLongArray(getRange().length+1);
34  
35    public MutableSizeHistogram(MetricsInfo info) {
36      this(info.name(), info.description());
37    }
38  
39    public MutableSizeHistogram(String name, String description) {
40      super(name, description);
41    }
42  
43    @Override
44    public String getRangeType() {
45      return rangeType;
46    }
47  
48    @Override
49    public long[] getRange() {
50      return ranges;
51    }
52    
53    @Override
54    public AtomicLongArray getRangeVals() {
55      return rangeVals;
56    }  
57  }