1 | using System;
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2 | using System.Collections.Concurrent;
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3 | using System.Collections.Generic;
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4 | using System.Linq;
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5 | using System.Threading;
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6 | using HeuristicLab.Common;
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7 | using HeuristicLab.Core;
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8 | using HeuristicLab.Core.Networks;
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9 | using HeuristicLab.Data;
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10 | using HeuristicLab.Encodings.BinaryVectorEncoding;
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11 | using HeuristicLab.Encodings.PermutationEncoding;
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12 | using HeuristicLab.Encodings.RealVectorEncoding;
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13 | using HeuristicLab.Operators;
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14 | using HeuristicLab.Optimization;
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15 | using HeuristicLab.Parameters;
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16 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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17 | using HeuristicLab.Problems.Knapsack;
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18 | using HeuristicLab.Problems.TravelingSalesman;
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19 |
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20 | namespace HeuristicLab.Networks.IntegratedOptimization {
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21 | [Item("TtpOrchestratorNode4", "An abstract base class for an orchestrator node for the TTP.")]
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22 | [StorableClass]
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23 | public sealed class TtpOrchestratorNode4 : OrchestratorNode {
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24 | #region Constants
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25 | private const string TspParameterName = "TSP";
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26 | private const string KspParameterName = "KSP";
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27 | private const string AvailabilityParameterName = "Availability";
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28 | private const string MinSpeedParameterName = "MinSpeed";
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29 | private const string MaxSpeedParameterName = "MaxSpeed";
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30 | private const string RentingRatioParameterName = "RentingRatio";
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31 | private const string IterationsParameterName = "Iterations";
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32 | private const string MetaSolverName = "MetaSolver";
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33 | private const string TspSolverName = "TspSolver";
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34 | private const string KspSolverName = "KspSolver";
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35 | private const string TspResultsResultName = "TspResults";
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36 | private const string KspResultsResultName = "KspResults";
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37 | private const string TtpResultsResultName = "TtpResults";
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38 | #endregion
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39 |
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40 | #region Thread Results
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41 | private object locker = new object();
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42 | private ConcurrentDictionary<int, ResultCollection> tspThreadResults = new ConcurrentDictionary<int, ResultCollection>();
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43 | private ConcurrentDictionary<int, ResultCollection> kspThreadResults = new ConcurrentDictionary<int, ResultCollection>();
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44 | #endregion
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45 |
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46 | #region Parameters
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47 | public IValueParameter<IntValue> IterationsParameter {
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48 | get { return (IValueParameter<IntValue>)Parameters[IterationsParameterName]; }
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49 | }
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50 |
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51 | public IValueParameter<TravelingSalesmanProblem> TspParameter {
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52 | get { return (IValueParameter<TravelingSalesmanProblem>)Parameters[TspParameterName]; }
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53 | }
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54 |
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55 | public IValueParameter<BinaryKnapsackProblem> KspParameter {
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56 | get { return (IValueParameter<BinaryKnapsackProblem>)Parameters[KspParameterName]; }
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57 | }
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58 |
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59 | public IValueParameter<IntArray> AvailabilityParameter {
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60 | get { return (IValueParameter<IntArray>)Parameters[AvailabilityParameterName]; }
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61 | }
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62 |
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63 | public IValueParameter<DoubleValue> MinSpeedParameter {
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64 | get { return (IValueParameter<DoubleValue>)Parameters[MinSpeedParameterName]; }
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65 | }
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66 |
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67 | public IValueParameter<DoubleValue> MaxSpeedParameter {
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68 | get { return (IValueParameter<DoubleValue>)Parameters[MaxSpeedParameterName]; }
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69 | }
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70 |
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71 | public IValueParameter<DoubleValue> RentingRatioParameter {
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72 | get { return (IValueParameter<DoubleValue>)Parameters[RentingRatioParameterName]; }
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73 | }
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74 | #endregion
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75 |
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76 | #region Ports
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77 | public IConfigurationPort MetaSolverOrchestrationPort {
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78 | get { return (IConfigurationPort)Ports[MetaSolverName + OrchestrationPortNameSuffix]; }
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79 | }
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80 |
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81 | public IConfigurationPort MetaSolverEvaluationPort {
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82 | get { return (IConfigurationPort)Ports[MetaSolverName + EvaluationPortNameSuffix]; }
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83 | }
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84 |
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85 | public IConfigurationPort TspSolverOrchestrationPort {
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86 | get { return (IConfigurationPort)Ports[TspSolverName + OrchestrationPortNameSuffix]; }
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87 | }
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88 |
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89 | public IConfigurationPort TspSolverEvaluationPort {
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90 | get { return (IConfigurationPort)Ports[TspSolverName + EvaluationPortNameSuffix]; }
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91 | }
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92 |
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93 | public IConfigurationPort KspSolverOrchestrationPort {
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94 | get { return (IConfigurationPort)Ports[KspSolverName + OrchestrationPortNameSuffix]; }
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95 | }
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96 |
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97 | public IConfigurationPort KspSolverEvaluationPort {
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98 | get { return (IConfigurationPort)Ports[KspSolverName + EvaluationPortNameSuffix]; }
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99 | }
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100 | #endregion
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101 |
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102 | #region Results
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103 | public ItemList<ResultCollection> TspResults {
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104 | get { return (ItemList<ResultCollection>)Results[TspResultsResultName].Value; }
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105 | }
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106 |
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107 | public ItemList<ResultCollection> KspResults {
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108 | get { return (ItemList<ResultCollection>)Results[KspResultsResultName].Value; }
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109 | }
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110 |
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111 | public ItemList<ResultCollection> TtpResults {
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112 | get { return (ItemList<ResultCollection>)Results[TtpResultsResultName].Value; }
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113 | }
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114 | #endregion
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115 |
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116 | [StorableConstructor]
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117 | private TtpOrchestratorNode4(bool deserializing) : base(deserializing) { }
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118 | private TtpOrchestratorNode4(TtpOrchestratorNode4 original, Cloner cloner) : base(original, cloner) { }
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119 | public TtpOrchestratorNode4() : this("TtpOrchestratorNode4") { }
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120 | public TtpOrchestratorNode4(string name) : base(name) {
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121 | #region Configure Parameters
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122 | Parameters.Add(new ValueParameter<IntValue>(IterationsParameterName, new IntValue(20)));
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123 | Parameters.Add(new ValueParameter<TravelingSalesmanProblem>(TspParameterName, new TravelingSalesmanProblem()));
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124 | Parameters.Add(new ValueParameter<BinaryKnapsackProblem>(KspParameterName, new BinaryKnapsackProblem()));
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125 | Parameters.Add(new ValueParameter<IntArray>(AvailabilityParameterName));
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126 | Parameters.Add(new ValueParameter<DoubleValue>(MinSpeedParameterName, new DoubleValue(0.1)));
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127 | Parameters.Add(new ValueParameter<DoubleValue>(MaxSpeedParameterName, new DoubleValue(1.0)));
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128 | Parameters.Add(new ValueParameter<DoubleValue>(RentingRatioParameterName, new DoubleValue(0.5)));
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129 | #endregion
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130 |
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131 | #region Configure Ports
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132 | AddOrchestrationPort<VariegationProblem>(MetaSolverName);
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133 | AddEvaluationPort<RealVector>(MetaSolverName, "RealVector", "Quality");
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134 | AddOrchestrationPort<TravelingSalesmanProblem>(TspSolverName);
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135 | AddEvaluationPort<Permutation>(TspSolverName, "TSPTour", "TSPTourLength");
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136 | AddOrchestrationPort<BinaryKnapsackProblem>(KspSolverName);
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137 | AddEvaluationPort<BinaryVector>(KspSolverName, "KnapsackSolution", "Quality");
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138 |
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139 | MetaSolverOrchestrationPort.ConnectedPortChanged += MetaSolverOrchestrationPort_ConnectedPortChanged;
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140 | TspSolverOrchestrationPort.ConnectedPortChanged += TspSolverOrchestrationPort_ConnectedPortChanged;
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141 | KspSolverOrchestrationPort.ConnectedPortChanged += KspSolverOrchestrationPort_ConnectedPortChanged;
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142 | #endregion
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143 | }
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144 |
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145 | public override IDeepCloneable Clone(Cloner cloner) {
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146 | return new TtpOrchestratorNode4(this, cloner);
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147 | }
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148 |
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149 | public override void Prepare() {
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150 | tspThreadResults.Clear();
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151 | kspThreadResults.Clear();
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152 | Results.Clear();
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153 | Results.Add(new Result(TspResultsResultName, new ItemList<ResultCollection>()));
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154 | Results.Add(new Result(KspResultsResultName, new ItemList<ResultCollection>()));
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155 | Results.Add(new Result(TtpResultsResultName, new ItemList<ResultCollection>()));
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156 | }
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157 |
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158 | public override void Start() {
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159 | var metaMsg = MetaSolverOrchestrationPort.PrepareMessage();
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160 | metaMsg["OrchestrationMessage"] = new EnumValue<OrchestrationMessage>(OrchestrationMessage.QualityAdaption);
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161 | var problem = new VariegationProblem();
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162 | problem.Encoding.Length = TspParameter.Value.Coordinates.Rows * 2;
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163 | problem.Encoding.Bounds = new DoubleMatrix(new[,] { { -1.0, 1.0 } });
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164 | metaMsg["Problem"] = problem;
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165 | MetaSolverOrchestrationPort.SendMessage(metaMsg);
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166 | }
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167 |
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168 | public override void Pause() {
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169 | throw new NotImplementedException();
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170 | }
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171 |
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172 | public override void Stop() {
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173 | throw new NotImplementedException();
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174 | }
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175 |
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176 | protected override void ProcessMessage(IMessage message, IMessagePort port, CancellationToken token) {
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177 | var messageActions = new Dictionary<IMessagePort, Action<IMessage>>();
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178 | messageActions.Add(MetaSolverOrchestrationPort, MetaSolverOrchestrationPortMessage);
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179 | messageActions.Add(MetaSolverEvaluationPort, MetaSolverEvaluationPortMessage);
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180 | messageActions.Add(TspSolverOrchestrationPort, TspSolverOrchestrationPortMessage);
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181 | messageActions.Add(TspSolverEvaluationPort, TspSolverEvaluationPortMessage);
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182 | messageActions.Add(KspSolverOrchestrationPort, KspSolverOrchestrationPortMessage);
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183 | messageActions.Add(KspSolverEvaluationPort, KspSolverEvaluationPortMessage);
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184 |
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185 | messageActions[port](message);
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186 |
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187 | base.ProcessMessage(message, port, token);
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188 | }
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189 |
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190 | #region MetaSolver Message Handling
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191 | private void MetaSolverOrchestrationPortMessage(IMessage message) { }
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192 |
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193 | private void MetaSolverEvaluationPortMessage(IMessage message) {
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194 | var factors = (RealVector)message["RealVector"];
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195 |
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196 | var tsp = (TravelingSalesmanProblem)TspParameter.Value.Clone();
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197 | for (int j = 0; j < tsp.Coordinates.Rows; j++) {
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198 | tsp.Coordinates[j, 0] = (int)Math.Ceiling(tsp.Coordinates[j, 0] * factors[j * 2]);
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199 | tsp.Coordinates[j, 1] = (int)Math.Ceiling(tsp.Coordinates[j, 1] * factors[j * 2 + 1]);
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200 | }
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201 |
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202 | var tspMsg = TspSolverOrchestrationPort.PrepareMessage();
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203 | tspMsg["OrchestrationMessage"] = new EnumValue<OrchestrationMessage>(OrchestrationMessage.Start);
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204 | tspMsg["Problem"] = tsp;
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205 | TspSolverOrchestrationPort.SendMessage(tspMsg);
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206 |
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207 | var tspResults = tspThreadResults[Thread.CurrentThread.ManagedThreadId];
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208 | var tour = (PathTSPTour)tspResults["Best TSP Solution"].Value;
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209 | tour.Coordinates = (DoubleMatrix)TspParameter.Value.Coordinates.Clone();
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210 | tour.Quality.Value = TSPCoordinatesPathEvaluator.Apply(new TSPEuclideanPathEvaluator(), tour.Coordinates, tour.Permutation);
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211 |
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212 | var kspMsg = KspSolverOrchestrationPort.PrepareMessage();
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213 | kspMsg["OrchestrationMessage"] = new EnumValue<OrchestrationMessage>(OrchestrationMessage.Start);
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214 | kspMsg["Problem"] = (BinaryKnapsackProblem)KspParameter.Value.Clone();
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215 | KspSolverOrchestrationPort.SendMessage(kspMsg);
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216 |
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217 | var kspResults = kspThreadResults[Thread.CurrentThread.ManagedThreadId];
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218 | var bestKspSolution = (BinaryVector)kspResults["Best Solution"].Value;
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219 | var kspCapacity = (IntValue)KspParameter.Value.KnapsackCapacity.Clone();
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220 | var kspPenalty = new DoubleValue(0.0);
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221 | var kspWeights = (IntArray)KspParameter.Value.Weights.Clone();
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222 | var kspValues = (IntArray)KspParameter.Value.Values.Clone();
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223 | var bestKspQuality = KnapsackEvaluator.Apply(bestKspSolution, kspCapacity, kspPenalty, kspWeights, kspValues).Quality;
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224 | var loot = new KnapsackSolution(bestKspSolution, bestKspQuality, kspCapacity, kspWeights, kspValues);
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225 | kspResults.Add(new Result("Best KSP Solution", loot));
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226 |
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227 | #region Analyze
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228 | double objectiveValue = EvaluateTtp(TspParameter.Value, tour.Permutation.ToArray(), KspParameter.Value, loot.BinaryVector.ToArray());
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229 | ((DoubleValue)message["Quality"]).Value = objectiveValue;
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230 |
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231 | var ttpResults = new ResultCollection();
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232 | ttpResults.Add(new Result("Quality", new DoubleValue(objectiveValue)));
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233 | ttpResults.Add(new Result("Tour", tour));
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234 | ttpResults.Add(new Result("Loot", loot));
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235 |
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236 | lock (locker) {
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237 | TtpResults.Add(ttpResults);
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238 | TspResults.Add(tspResults);
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239 | KspResults.Add(kspResults);
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240 |
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241 | IResult bestQuality;
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242 | if (!Results.TryGetValue("Best TTP Quality", out bestQuality)) {
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243 | Results.Add(new Result("Best TTP Quality", new DoubleValue(objectiveValue)));
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244 | Results.Add(new Result("Best Tour", tour));
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245 | Results.Add(new Result("Best Loot", loot));
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246 | } else if (((DoubleValue)bestQuality.Value).Value < objectiveValue) {
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247 | ((DoubleValue)bestQuality.Value).Value = objectiveValue;
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248 | Results["Best Tour"].Value = tour;
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249 | Results["Best Loot"].Value = loot;
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250 | }
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251 | }
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252 | #endregion
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253 | }
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254 | #endregion
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255 |
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256 | #region TspSolver Message Handling
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257 | private void TspSolverOrchestrationPortMessage(IMessage message) {
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258 | var results = (ResultCollection)message["Results"];
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259 | if (results.ContainsKey("Best TSP Solution")) {
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260 | tspThreadResults[Thread.CurrentThread.ManagedThreadId] = results;
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261 | }
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262 | }
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263 |
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264 | private void TspSolverEvaluationPortMessage(IMessage message) { }
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265 | #endregion
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266 |
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267 | #region KspSolver Message Handling
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268 | private void KspSolverOrchestrationPortMessage(IMessage message) {
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269 | var results = (ResultCollection)message["Results"];
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270 | if (results.ContainsKey("Best Solution")) {
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271 | kspThreadResults[Thread.CurrentThread.ManagedThreadId] = results;
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272 | }
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273 | }
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274 |
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275 | private void KspSolverEvaluationPortMessage(IMessage message) { }
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276 | #endregion
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277 |
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278 | #region Helpers
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279 | private double EvaluateTtp(TravelingSalesmanProblem tsp, int[] tour, BinaryKnapsackProblem ksp, bool[] loot) {
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280 | bool feasible;
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281 | return EvaluateTtp(tsp, tour, ksp, loot, out feasible);
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282 | }
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283 |
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284 | private double EvaluateTtp(TravelingSalesmanProblem tsp, int[] tour, BinaryKnapsackProblem ksp, bool[] loot, out bool feasible) {
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285 | double collectedWeight = 0.0;
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286 | double objectiveValue = 0.0;
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287 | double infeasibleBaseLine = -1000000.0;
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288 | double speedCoefficient = (MaxSpeedParameter.Value.Value - MinSpeedParameter.Value.Value) / ksp.KnapsackCapacity.Value;
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289 |
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290 | int hideoutIdx = 0;
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291 | while (tour[hideoutIdx] != 0) hideoutIdx++;
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292 | int cityIdx = (hideoutIdx + 1) % tour.Length;
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293 | int lastCityIdx = hideoutIdx;
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294 |
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295 | while (cityIdx != hideoutIdx) {
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296 | double oldCollectedWeight = collectedWeight;
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297 | var availableItems = AvailabilityParameter.Value.Select((c, i) => new { CityIdx = c, ItemIdx = i }).Where(x => x.CityIdx == tour[cityIdx]);
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298 |
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299 | foreach (var item in availableItems) {
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300 | if (!loot[item.ItemIdx]) continue;
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301 | collectedWeight += ksp.Weights[item.ItemIdx];
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302 | objectiveValue += ksp.Values[item.ItemIdx];
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303 | }
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304 |
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305 | objectiveValue -= Distance(tsp.Coordinates.CloneAsMatrix(), tour[lastCityIdx], tour[cityIdx]) * RentingRatioParameter.Value.Value /
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306 | (MaxSpeedParameter.Value.Value - speedCoefficient * oldCollectedWeight);
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307 | lastCityIdx = cityIdx;
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308 | cityIdx = (cityIdx + 1) % tour.Length;
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309 | }
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310 |
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311 | objectiveValue -= Distance(tsp.Coordinates.CloneAsMatrix(), tour[lastCityIdx], tour[hideoutIdx]) * RentingRatioParameter.Value.Value /
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312 | (MaxSpeedParameter.Value.Value - speedCoefficient * collectedWeight);
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313 |
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314 | feasible = collectedWeight <= ksp.KnapsackCapacity.Value;
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315 | if (!feasible) objectiveValue = infeasibleBaseLine - collectedWeight;
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316 |
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317 | return objectiveValue;
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318 | }
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319 |
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320 | private double Distance(double[,] coords, int fromIdx, int toIdx) {
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321 | double fromX = coords[fromIdx, 0], fromY = coords[fromIdx, 1],
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322 | toX = coords[toIdx, 0], toY = coords[toIdx, 1];
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323 | return (int)Math.Ceiling(Math.Sqrt((toX - fromX) * (toX - fromX) + (toY - fromY) * (toY - fromY)));
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324 | }
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325 | #endregion
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326 |
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327 | #region Event Handlers
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328 | private void MetaSolverOrchestrationPort_ConnectedPortChanged(object sender, EventArgs e) {
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329 | if (MetaSolverOrchestrationPort.ConnectedPort == null) return;
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330 |
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331 | var node = MetaSolverOrchestrationPort.ConnectedPort.Parent as OrchestratedAlgorithmNode;
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332 | if (node == null) return;
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333 |
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334 | var hook = new HookOperator { Name = "Meta Eval Hook" };
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335 | hook.Parameters.Add(new LookupParameter<RealVector>("RealVector") { Hidden = true });
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336 | hook.Parameters.Add(new LookupParameter<DoubleValue>("Quality") { Hidden = true });
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337 | node.EvalHook = hook;
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338 |
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339 | node.OrchestrationPort.CloneParametersFromPort(MetaSolverOrchestrationPort);
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340 | node.EvaluationPort.CloneParametersFromPort(MetaSolverEvaluationPort);
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341 | node.EvaluationPort.ConnectedPort = MetaSolverEvaluationPort;
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342 | }
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343 |
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344 | private void TspSolverOrchestrationPort_ConnectedPortChanged(object sender, EventArgs e) {
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345 | if (TspSolverOrchestrationPort.ConnectedPort == null) return;
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346 |
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347 | var node = TspSolverOrchestrationPort.ConnectedPort.Parent as OrchestratedAlgorithmNode;
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348 | if (node == null) return;
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349 |
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350 | var hook = new HookOperator { Name = "TSP Eval Hook" };
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351 | hook.Parameters.Add(new LookupParameter<Permutation>("TSPTour") { Hidden = true });
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352 | hook.Parameters.Add(new LookupParameter<DoubleValue>("TSPTourLength") { Hidden = true });
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353 | node.EvalHook = hook;
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354 |
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355 | node.OrchestrationPort.CloneParametersFromPort(TspSolverOrchestrationPort);
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356 | node.EvaluationPort.CloneParametersFromPort(TspSolverEvaluationPort);
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357 | node.EvaluationPort.ConnectedPort = TspSolverEvaluationPort;
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358 | }
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359 |
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360 | private void KspSolverOrchestrationPort_ConnectedPortChanged(object sender, EventArgs e) {
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361 | if (KspSolverOrchestrationPort.ConnectedPort == null) return;
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362 |
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363 | var node = KspSolverOrchestrationPort.ConnectedPort.Parent as OrchestratedAlgorithmNode;
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364 | if (node == null) return;
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365 |
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366 | var hook = new HookOperator { Name = "KSP Eval Hook" };
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367 | hook.Parameters.Add(new LookupParameter<BinaryVector>("KnapsackSolution") { Hidden = true });
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368 | hook.Parameters.Add(new LookupParameter<DoubleValue>("Quality") { Hidden = true });
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369 | node.EvalHook = hook;
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370 |
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371 | node.OrchestrationPort.CloneParametersFromPort(KspSolverOrchestrationPort);
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372 | node.EvaluationPort.CloneParametersFromPort(KspSolverEvaluationPort);
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373 | node.EvaluationPort.ConnectedPort = KspSolverEvaluationPort;
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374 | }
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375 | #endregion
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376 | }
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377 | }
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