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.aggregator; 25 26 import java.util.Map; 27 28 import sun.evtracing.processing.statistics.NumberStatistic; 29 import sun.evtracing.processing.statistics.metadata.Contention; 30 31 public abstract class Aggregator implements ContentionProcessor { 32 private final AggregatorFactory<? extends Aggregator> factory; 33 private final NumberStatistic statistic; 34 35 public Aggregator(AggregatorFactory<? extends Aggregator> factory) { 36 this.factory = factory; 37 statistic = new NumberStatistic(); 38 } 39 40 public Aggregator(Aggregator x, Aggregator y) { 41 assert x.factory == y.factory; 42 factory = x.factory; 43 44 statistic = NumberStatistic.merge(x.statistic, y.statistic); 45 } 46 47 public AggregatorFactory<? extends Aggregator> factory() { 48 return factory; 49 } 50 51 public NumberStatistic statistic() { 52 return statistic; 53 } 54 55 @Override 56 public void submit(Contention c) { 57 statistic.add(c.duration); 58 submitToChildren(c); 59 } 60 61 public abstract void submitToChildren(Contention c); 62 63 @Override 64 public abstract void merge(); 65 66 public abstract Map<?, Aggregator> children(); 67 68 public abstract <R> R accept(AggregatorVisitor<R> v, Object element); 69 }