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