| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.alibaba.jstorm.common.metric.old; |
| |
| import com.alibaba.jstorm.common.metric.old.operator.convert.Convertor; |
| import com.alibaba.jstorm.common.metric.old.operator.merger.AvgMerger; |
| import com.alibaba.jstorm.common.metric.old.operator.updater.AvgUpdater; |
| import com.alibaba.jstorm.common.metric.old.window.Metric; |
| |
| /** |
| * Meter is used to compute tps |
| * |
| * Attention: 1. |
| * |
| * @author zhongyan.feng |
| * |
| */ |
| public class Histogram extends Metric<Double, Histogram.HistorgramPair> { |
| private static final long serialVersionUID = -1362345159511508074L; |
| |
| public Histogram() { |
| defaultValue = new HistorgramPair(); |
| updater = new AvgUpdater(); |
| merger = new AvgMerger(); |
| convertor = new HistogramConvertor(); |
| |
| init(); |
| } |
| |
| public static class HistogramConvertor implements Convertor<HistorgramPair, Double> { |
| private static final long serialVersionUID = -1569170826785657226L; |
| |
| @Override |
| public Double convert(HistorgramPair from) { |
| // TODO Auto-generated method stub |
| if (from == null) { |
| return 0.0d; |
| } |
| |
| if (from.getTimes() == 0) { |
| return 0.0d; |
| } else { |
| return from.getSum() / from.getTimes(); |
| } |
| } |
| |
| } |
| |
| public static class HistorgramPair { |
| private double sum; |
| private long times; |
| |
| public HistorgramPair() { |
| |
| } |
| |
| public HistorgramPair(double sum, long times) { |
| this.sum = sum; |
| this.times = times; |
| } |
| |
| public double getSum() { |
| return sum; |
| } |
| |
| public void setSum(double sum) { |
| this.sum = sum; |
| } |
| |
| public void addValue(double value) { |
| sum += value; |
| } |
| |
| public long getTimes() { |
| return times; |
| } |
| |
| public void setTimes(long times) { |
| this.times = times; |
| } |
| |
| public void addTimes(long time) { |
| times += time; |
| } |
| } |
| |
| } |