[6623] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Linq;
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| 25 | using System.Text;
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| 26 | using HeuristicLab.Core;
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| 27 | using System.Drawing;
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| 28 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 29 | using HeuristicLab.Common;
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| 30 | using HeuristicLab.Collections;
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| 31 | using HeuristicLab.Optimization;
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| 32 | using System.Threading;
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| 33 | using System.Threading.Tasks;
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| 34 |
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| 35 | namespace HeuristicLab.SimulationCore {
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| 36 | [Item("Simulation", "A base class for simulations.")]
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| 37 | [StorableClass]
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| 38 | public abstract class Simulation: Algorithm, ISimulation, IStorableContent {
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| 39 | public string Filename { get; set; }
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| 40 |
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| 41 | public override Type ProblemType {
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| 42 | get { return typeof(IScenario); }
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| 43 | }
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| 44 |
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| 45 | [Storable]
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| 46 | private ResultCollection results;
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| 47 | public override ResultCollection Results {
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| 48 | get {
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| 49 | return results;
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| 50 | }
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| 51 | }
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| 52 |
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| 53 | #region Variables for communication between threads
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| 54 | private CancellationTokenSource cancellationTokenSource;
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| 55 | private bool stopPending;
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| 56 | private DateTime lastUpdateTime;
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| 57 | #endregion
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| 58 |
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| 59 | [StorableConstructor]
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| 60 | protected Simulation(bool deserializing) : base(deserializing) { }
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| 61 | protected Simulation()
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| 62 | : base() {
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| 63 | results = new ResultCollection();
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| 64 | }
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| 65 | protected Simulation(Simulation original, Cloner cloner)
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| 66 | : base(original, cloner) {
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| 67 | results = cloner.Clone(original.results) as ResultCollection;
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| 68 | }
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| 69 |
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| 70 | public sealed override void Prepare() {
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| 71 | base.Prepare();
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| 72 | results.Clear();
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| 73 | OnPrepared();
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| 74 | }
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| 75 | protected override void OnPrepared() {
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| 76 | base.OnPrepared();
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| 77 | }
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| 78 |
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[7204] | 79 | private class RunInformation {
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| 80 | public CancellationTokenSource CancellationToken { get; set; }
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| 81 | public IExecutionContext ExecutionContext { get; set; }
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| 82 | }
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| 83 |
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| 84 | public virtual void Start(IExecutionContext executionContext) {
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[6623] | 85 | base.Start();
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[7204] | 86 |
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| 87 | RunInformation runInfo = new RunInformation();
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[6623] | 88 | cancellationTokenSource = new CancellationTokenSource();
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[7204] | 89 | runInfo.CancellationToken = cancellationTokenSource;
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| 90 | runInfo.ExecutionContext = executionContext;
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[6623] | 91 | stopPending = false;
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[7204] | 92 | Task task = Task.Factory.StartNew(Run, runInfo, runInfo.CancellationToken.Token);
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[6623] | 93 | task.ContinueWith(t => {
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| 94 | try {
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| 95 | t.Wait();
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| 96 | }
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| 97 | catch (AggregateException ex) {
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| 98 | try {
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| 99 | ex.Flatten().Handle(x => x is OperationCanceledException);
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| 100 | }
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| 101 | catch (AggregateException remaining) {
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| 102 | if (remaining.InnerExceptions.Count == 1) OnExceptionOccurred(remaining.InnerExceptions[0]);
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| 103 | else OnExceptionOccurred(remaining);
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| 104 | }
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| 105 | }
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| 106 | cancellationTokenSource.Dispose();
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| 107 | cancellationTokenSource = null;
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| 108 | if (stopPending) OnStopped();
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| 109 | else OnPaused();
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| 110 | });
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| 111 | }
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[7204] | 112 |
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| 113 | public override void Start() {
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| 114 | Start(null);
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| 115 | }
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[6623] | 116 | protected override void OnStarted() {
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| 117 | base.OnStarted();
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| 118 | }
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| 119 |
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| 120 | public override void Pause() {
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| 121 | base.Pause();
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| 122 | cancellationTokenSource.Cancel();
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| 123 | }
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| 124 | protected override void OnPaused() {
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| 125 | base.OnPaused();
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| 126 | }
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| 127 |
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| 128 | public override void Stop() {
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| 129 | base.Stop();
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| 130 | if (ExecutionState == ExecutionState.Paused) {
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| 131 | OnStopped();
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| 132 | } else {
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| 133 | stopPending = true;
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| 134 | cancellationTokenSource.Cancel();
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| 135 | }
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| 136 | }
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| 137 | protected override void OnStopped() {
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| 138 | base.OnStopped();
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| 139 | }
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| 140 |
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| 141 | protected override void OnExceptionOccurred(Exception exception) {
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| 142 | base.OnExceptionOccurred(exception);
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| 143 | }
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| 144 |
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| 145 | private void Run(object state) {
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[7204] | 146 | RunInformation runInfo = (RunInformation)state;
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[6623] | 147 |
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| 148 | OnStarted();
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| 149 | lastUpdateTime = DateTime.Now;
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| 150 | System.Timers.Timer timer = new System.Timers.Timer(250);
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| 151 | timer.AutoReset = true;
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| 152 | timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
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| 153 | timer.Start();
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| 154 | try {
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[7204] | 155 | foreach (IParameter parameter in Parameters) {
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| 156 | parameter.ExecutionContext = runInfo.ExecutionContext;
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| 157 | }
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| 158 |
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| 159 | Run(runInfo.CancellationToken.Token);
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[6623] | 160 | }
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| 161 | finally {
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| 162 | timer.Elapsed -= new System.Timers.ElapsedEventHandler(timer_Elapsed);
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| 163 | timer.Stop();
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| 164 | ExecutionTime += DateTime.Now - lastUpdateTime;
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[7204] | 165 |
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| 166 | foreach (IParameter parameter in Parameters) {
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| 167 | parameter.ExecutionContext = null;
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| 168 | }
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[6623] | 169 | }
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| 170 | Stop();
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| 171 |
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[7204] | 172 | runInfo.CancellationToken.Token.ThrowIfCancellationRequested();
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[6623] | 173 | }
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| 174 | protected abstract void Run(CancellationToken cancellationToken);
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| 175 |
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| 176 | private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) {
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| 177 | System.Timers.Timer timer = (System.Timers.Timer)sender;
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| 178 | timer.Enabled = false;
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| 179 | DateTime now = DateTime.Now;
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| 180 | ExecutionTime += now - lastUpdateTime;
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| 181 | lastUpdateTime = now;
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| 182 | timer.Enabled = true;
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| 183 | }
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| 184 | }
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| 185 | }
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