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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 org.apache.hadoop.hbase.classification.InterfaceAudience;
22  import org.apache.hadoop.metrics2.MetricsInfo;
23  
24  /**
25   * Extended histogram implementation with counters for metric size ranges.
26   */
27  @InterfaceAudience.Private
28  public class MutableSizeHistogram extends MutableRangeHistogram {
29    private final static String RANGE_TYPE = "SizeRangeCount";
30    private final static long[] RANGES = {10,100,1000,10000,100000,1000000,10000000,100000000};
31  
32    public MutableSizeHistogram(MetricsInfo info) {
33      this(info.name(), info.description());
34    }
35  
36    public MutableSizeHistogram(String name, String description) {
37      this(name, description, RANGES[RANGES.length-2]);
38    }
39  
40    public MutableSizeHistogram(String name, String description, long expectedMax) {
41      super(name, description, expectedMax);
42    }
43  
44    @Override
45    public String getRangeType() {
46      return RANGE_TYPE;
47    }
48  
49    @Override
50    public long[] getRanges() {
51      return RANGES;
52    }
53  
54  }