1 /* 2 * Copyright (c) 2014, 2015, Dynatrace and/or its affiliates. All rights reserved. 3 * 4 * This file is part of the Lock Contention Tracing Subsystem for the HotSpot 5 * Virtual Machine, which is developed at Christian Doppler Laboratory on 6 * Monitoring and Evolution of Very-Large-Scale Software Systems. Please 7 * contact us at <http://mevss.jku.at/> if you need additional information 8 * or have any questions. 9 * 10 * This code is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License version 2 only, as 12 * published by the Free Software Foundation. 13 * 14 * This code is distributed in the hope that it will be useful, but WITHOUT 15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 17 * version 2 for more details (a copy is included in the LICENSE file that 18 * accompanied this code). 19 * 20 * You should have received a copy of the GNU General Public License version 21 * 2 along with this work. If not, see <http://www.gnu.org/licenses/>. 22 * 23 */ 24 package sun.evtracing.processing.statistics; 25 26 public class NumberStatistic { 27 public static NumberStatistic merge(NumberStatistic x, NumberStatistic y) { 28 NumberStatistic s = new NumberStatistic(); 29 s.max = Math.max(x.max, y.max); 30 s.count = x.count + y.count; 31 s.sum = x.sum + y.sum; 32 return s; 33 } 34 35 private long max; 36 private long sum; 37 private long count; 38 39 public long getSum() { 40 return sum; 41 } 42 43 public double getAverage() { 44 if (count > 0) { 45 return sum / count; 46 } else { 47 return Double.NaN; 48 } 49 } 50 51 public long getMax() { 52 return max; 53 } 54 55 public void add(long value) { 56 max = Math.max(max, value); 57 sum += value; 58 count++; 59 } 60 }