1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2015 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.IO;
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25 |
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26 | using DistributedGA.Core.Implementation;
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27 | using DistributedGA.Core.Interface;
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28 | using DistributedGA.Hive;
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29 | using HeuristicLab.Common;
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30 | using HeuristicLab.Core;
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31 | using HeuristicLab.Data;
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32 | using HeuristicLab.Operators;
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33 | using HeuristicLab.Parameters;
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34 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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35 |
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36 | namespace HeuristicLab.Optimization.Operators {
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37 | [Item("P2PMigrationAnalyzer", "Migrates individuals using a P2P network.")]
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38 | [StorableClass]
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39 | public class P2PMigrationAnalyzer : SingleSuccessorOperator, IAnalyzer, ISingleObjectiveOperator {
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40 | // state: messagehandler
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41 | private IMessageHandler h;
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42 |
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43 | public bool EnabledByDefault { get { return false; } }
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44 |
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45 | public ILookupParameter<BoolValue> MaximizationParameter {
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46 | get { return (ILookupParameter<BoolValue>)Parameters["Maximization"]; }
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47 | }
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48 | // for name translation
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49 | public ScopeTreeLookupParameter<DoubleValue> QualityParameter {
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50 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["Quality"]; }
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51 | }
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52 | public ILookupParameter<IntValue> MigrationIterationsParameter {
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53 | get { return (ILookupParameter<IntValue>)Parameters["MigrationIterations"]; }
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54 | }
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55 | public ILookupParameter<PercentValue> MigrationRatesParameter {
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56 | get { return (ILookupParameter<PercentValue>)Parameters["MigrationRate"]; }
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57 | }
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58 | public ILookupParameter<PercentValue> CommunicationRatesParameter {
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59 | get { return (ILookupParameter<PercentValue>)Parameters["CommunicationRate"]; }
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60 | }
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61 | public ILookupParameter<IntValue> MessageCacheCapacityParameter {
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62 | get { return (ILookupParameter<IntValue>)Parameters["MessageCacheCapacity"]; }
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63 | }
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64 | public ILookupParameter<IRandom> RandomParameter {
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65 | get { return (ILookupParameter<IRandom>)Parameters["Random"]; }
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66 | }
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67 | public IValueParameter<IntValue> MigrationIntervalParameter {
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68 | get { return (IValueParameter<IntValue>)Parameters["MigrationInterval"]; }
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69 | }
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70 | public IValueParameter<ILog> LogParameter {
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71 | get { return (IValueParameter<ILog>)Parameters["Log"]; }
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72 | }
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73 |
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74 | public IConstrainedValueParameter<EnumValue<MigrationStrategy>> MigrationStrategySelectParameter {
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75 | get { return (IConstrainedValueParameter<EnumValue<MigrationStrategy>>)Parameters["MigrationStrategySelect"]; }
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76 | }
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77 |
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78 | public IConstrainedValueParameter<EnumValue<MigrationStrategy>> MigrationStrategyReplaceParameter {
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79 | get { return (IConstrainedValueParameter<EnumValue<MigrationStrategy>>)Parameters["MigrationStrategyReplace"]; }
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80 | }
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81 |
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82 | public BoolValue Maximization {
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83 | get { return MaximizationParameter.ActualValue; }
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84 | }
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85 | public IntValue MigrationIterations {
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86 | get { return MigrationIterationsParameter.ActualValue; }
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87 | }
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88 |
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89 | public IntValue MigrationInterval {
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90 | get { return MigrationIntervalParameter.Value; }
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91 | }
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92 |
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93 | public IRandom Random {
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94 | get { return RandomParameter.ActualValue; }
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95 | }
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96 |
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97 | [StorableConstructor]
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98 | protected P2PMigrationAnalyzer(bool deserializing) : base(deserializing) { }
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99 | protected P2PMigrationAnalyzer(P2PMigrationAnalyzer original, Cloner cloner) : base(original, cloner) { }
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100 |
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101 | public P2PMigrationAnalyzer()
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102 | : base() {
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103 | Parameters.Add(new LookupParameter<IntValue>("MigrationIterations"));
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104 | Parameters.Add(new LookupParameter<BoolValue>("Maximization"));
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105 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Quality", 1));
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106 | Parameters.Add(new ValueParameter<IntValue>("MigrationInterval", "", new IntValue(5)));
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107 | Parameters.Add(new ValueParameter<PercentValue>("MigrationRate", "", new PercentValue(0.05)));
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108 | Parameters.Add(new ValueParameter<PercentValue>("CommunicationRate", "", new PercentValue(0.10)));
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109 | Parameters.Add(new ValueParameter<IntValue>("MessageCacheCapacity", "", new IntValue(1000)));
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110 | Parameters.Add(new ValueParameter<StringValue>("LanIpPrefix", "", new StringValue("10.")));
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111 | Parameters.Add(new LookupParameter<IRandom>("Random", "The random number generator"));
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112 | Parameters.Add(new ValueParameter<StringValue>("ContactServerURL", "", new StringValue("net.tcp://10.42.1.150:9090/DistributedGA.ContactServer/ContactService")));
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113 | Parameters.Add(new ValueParameter<StringValue>("JobGUID", "", new StringValue(Guid.NewGuid().ToString())));
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114 | Parameters.Add(new ValueParameter<ILog>("Log", "The log", new Log(1000)));
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115 |
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116 | var validValues = new ItemSet<EnumValue<MigrationStrategy>>();
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117 | validValues.Add(new EnumValue<MigrationStrategy>(MigrationStrategy.Best));
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118 | validValues.Add(new EnumValue<MigrationStrategy>(MigrationStrategy.Worst));
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119 | validValues.Add(new EnumValue<MigrationStrategy>(MigrationStrategy.Random));
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120 | Parameters.Add(new ConstrainedValueParameter<EnumValue<MigrationStrategy>>("MigrationStrategySelect", validValues, (new EnumValue<MigrationStrategy>(MigrationStrategy.Random))));
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121 | Parameters.Add(new ConstrainedValueParameter<EnumValue<MigrationStrategy>>("MigrationStrategyReplace", validValues, (new EnumValue<MigrationStrategy>(MigrationStrategy.Random))));
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122 |
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123 | }
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124 |
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125 | public override IDeepCloneable Clone(Cloner cloner) {
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126 | return new P2PMigrationAnalyzer(this, cloner);
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127 | }
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128 |
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129 | private void Init() {
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130 | h = new PeerNetworkMessageHandler();
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131 | var lanIpPrefix = ((StringValue)(Parameters["LanIpPrefix"].ActualValue)).Value;
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132 | var contactServerUri = ((StringValue)(Parameters["ContactServerURL"].ActualValue)).Value;
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133 | var problemInstance = ((StringValue)Parameters["JobGUID"].ActualValue).Value;
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134 | var communicationRate = ((PercentValue)Parameters["CommunicationRate"].ActualValue).Value;
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135 | var messageCacheCapacity = ((IntValue)Parameters["MessageCacheCapacity"].ActualValue).Value;
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136 | h.Init(lanIpPrefix, contactServerUri, problemInstance, (int)(100 * messageCacheCapacity), (int)(100 * communicationRate));
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137 | h.ExceptionOccurend += ExceptionThrown;
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138 | }
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139 |
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140 | public override IOperation Apply() {
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141 | if (h == null) {
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142 | Init();
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143 | //TODO: sort population
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144 |
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145 | }
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146 | if (MigrationIterationsParameter.ActualValue == null) {
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147 | MigrationIterationsParameter.ActualValue = new IntValue(0);
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148 | }
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149 |
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150 | if (MigrationIterations.Value % MigrationInterval.Value == 0) {
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151 |
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152 | IScope scope = ExecutionContext.Scope;
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153 | List<IScope> emigrantsList = new List<IScope>();
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154 |
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155 | //define how many migrants to send
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156 | var migrationRate = ((PercentValue)Parameters["MigrationRate"].ActualValue).Value;
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157 | int noOfEmigrants = Convert.ToInt32(scope.SubScopes.Count * migrationRate);
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158 | if (noOfEmigrants == 0 && scope.SubScopes.Count > 0) {
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159 | noOfEmigrants = 0;
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160 | }
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161 | var popQualities = QualityParameter.ActualValue;
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162 | var selectedMigStratSelect = MigrationStrategySelectParameter.Value.Value;
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163 | var selectedMigStratReplace = MigrationStrategyReplaceParameter.Value.Value;
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164 |
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165 | var rand = Random;
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166 | int replIdx = 0;
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167 | IScope emigrants = null;
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168 |
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169 | for (int i = 0; i < noOfEmigrants; i++) {
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170 | //select emigrant depending on strategy
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171 | switch (selectedMigStratSelect) {
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172 | case MigrationStrategy.Best:
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173 | emigrants = scope.SubScopes[i];
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174 | emigrantsList.Add(emigrants);
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175 | break;
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176 |
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177 | case MigrationStrategy.Random:
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178 | replIdx = rand.Next(scope.SubScopes.Count);
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179 | emigrants = scope.SubScopes[replIdx];
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180 | emigrantsList.Add(emigrants);
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181 | break;
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182 |
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183 | case MigrationStrategy.Worst:
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184 | emigrants = scope.SubScopes[scope.SubScopes.Count - i];
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185 | emigrantsList.Add(emigrants);
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186 | break;
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187 |
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188 |
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189 | default:
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190 | break;
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191 | }
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192 | }
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193 |
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194 | {
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195 | // send
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196 | for (int ei = 0; ei < emigrantsList.Count; ei++) {
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197 | using (var stream = new MemoryStream()) {
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198 | byte[] message;
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199 | var emigrantScope = emigrantsList[ei];
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200 |
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201 | var msgScope = new Scope();
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202 | var cloner = new Cloner();
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203 | foreach (var variable in emigrantScope.Variables) {
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204 | msgScope.Variables.Add((IVariable)variable.Clone(cloner));
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205 | }
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206 | HeuristicLab.Persistence.Default.Xml.XmlGenerator.Serialize(msgScope, stream);
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207 | message = stream.GetBuffer();
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208 | h.PublishDataToNetwork(message);
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209 |
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210 | }
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211 | }
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212 | }
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213 |
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214 |
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215 | {
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216 | // recieve
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217 | var message = h.GetDataFromNetwork();
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218 | //for (int ei = 0; ei < message.Length; ei++) {
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219 | foreach (var msg in message) {
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220 | using (var stream = new MemoryStream(msg.Value)) {
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221 | var immigrantScope = HeuristicLab.Persistence.Default.Xml.XmlParser.Deserialize<IScope>(stream);
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222 |
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223 | // replace individual in current population
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224 | switch (selectedMigStratReplace) {
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225 | case MigrationStrategy.Best:
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226 | scope.SubScopes.RemoveAt(0);
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227 | break;
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228 |
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229 | case MigrationStrategy.Random:
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230 | replIdx = rand.Next(scope.SubScopes.Count);
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231 | scope.SubScopes.RemoveAt(replIdx);
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232 | break;
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233 |
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234 | case MigrationStrategy.Worst:
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235 | //replace random
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236 | scope.SubScopes.RemoveAt(scope.SubScopes.Count);
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237 | break;
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238 |
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239 | default:
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240 | break;
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241 | }
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242 |
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243 | //insert individual sortet in population
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244 | var qualities = QualityParameter.ActualValue;
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245 | var qualityTranslatedName = QualityParameter.TranslatedName;
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246 | var qImmigrant = ((DoubleValue)immigrantScope.Variables[qualityTranslatedName].Value).Value;
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247 | var insertPos = scope.SubScopes.Count;
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248 | var maximization = Maximization.Value;
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249 | for (int i = 0; i < qualities.Length; i++) {
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250 | var qi = qualities[i].Value;
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251 | if ((maximization && qi < qImmigrant) || (!maximization && qi > qImmigrant)) {
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252 | insertPos = i;
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253 | break;
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254 | }
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255 | }
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256 |
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257 | scope.SubScopes.Insert(insertPos, immigrantScope);
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258 |
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259 | var log = LogParameter.Value;
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260 | double quality = 0.0;
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261 | quality = qImmigrant;
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262 | log.LogMessage(string.Format("Recieved individual with quality {0} from peer {1}:{2} ; Job: {3}",
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263 | quality, msg.Key.IpAddress, msg.Key.Port, msg.Key.ProblemInstance));
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264 | }
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265 | }
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266 | }
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267 | }
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268 |
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269 | MigrationIterations.Value++;
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270 | return base.Apply();
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271 | }
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272 |
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273 | private void ExceptionThrown(object sender, Exception e) {
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274 | var log = LogParameter.Value;
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275 | log.LogMessage(e.Message);
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276 | }
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277 |
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278 | }
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279 | }
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