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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 time ranges.
26   */
27  @InterfaceAudience.Private
28  public class MutableTimeHistogram extends MutableRangeHistogram {
29    private final static String RANGE_TYPE = "TimeRangeCount";
30    private final static long[] RANGES =
31        { 1, 3, 10, 30, 100, 300, 1000, 3000, 10000, 30000, 60000, 120000, 300000, 600000 };
32  
33    public MutableTimeHistogram(MetricsInfo info) {
34      this(info.name(), info.description());
35    }
36  
37    public MutableTimeHistogram(String name, String description) {
38      this(name, description, RANGES[RANGES.length - 2]);
39    }
40  
41    public MutableTimeHistogram(String name, String description, long expectedMax) {
42      super(name, description, expectedMax);
43    }
44  
45    @Override
46    public String getRangeType() {
47      return RANGE_TYPE;
48    }
49  
50    @Override
51    public long[] getRanges() {
52      return RANGES;
53    }
54  
55  }