001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.metrics2.lib;
020
021import org.apache.hadoop.metrics2.MetricsInfo;
022import org.apache.yetus.audience.InterfaceAudience;
023
024/**
025 * Extended histogram implementation with counters for metric time ranges.
026 */
027@InterfaceAudience.Private
028public class MutableTimeHistogram extends MutableRangeHistogram {
029  private final static String RANGE_TYPE = "TimeRangeCount";
030  private final static long[] RANGES =
031    { 1, 3, 10, 30, 100, 300, 1000, 3000, 10000, 30000, 60000, 120000, 300000, 600000 };
032
033  public MutableTimeHistogram(MetricsInfo info) {
034    this(info.name(), info.description());
035  }
036
037  public MutableTimeHistogram(String name, String description) {
038    this(name, description, RANGES[RANGES.length - 2]);
039  }
040
041  public MutableTimeHistogram(String name, String description, long expectedMax) {
042    super(name, description, expectedMax);
043  }
044
045  @Override
046  public String getRangeType() {
047    return RANGE_TYPE;
048  }
049
050  @Override
051  public long[] getRanges() {
052    return RANGES;
053  }
054
055}