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 */
018package org.apache.hadoop.hbase.metrics.impl;
019
020import java.util.concurrent.TimeUnit;
021
022import org.apache.hadoop.hbase.metrics.Timer;
023import org.apache.yetus.audience.InterfaceAudience;
024
025/**
026 * Custom implementation of {@link Timer}.
027 */
028@InterfaceAudience.Private
029public class TimerImpl implements Timer {
030  private final HistogramImpl histogram;
031  private final DropwizardMeter meter;
032
033  // track time events in micros
034  private static final TimeUnit DEFAULT_UNIT = TimeUnit.MICROSECONDS;
035
036  public TimerImpl() {
037    this.histogram = new HistogramImpl();
038    this.meter = new DropwizardMeter();
039  }
040
041  @Override
042  public void update(long duration, TimeUnit unit) {
043    if (duration >= 0) {
044      histogram.update(DEFAULT_UNIT.convert(duration, unit));
045      meter.mark();
046    }
047  }
048
049  @Override
050  public HistogramImpl getHistogram() {
051    return histogram;
052  }
053
054  @Override
055  public DropwizardMeter getMeter() {
056    return meter;
057  }
058}