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.Threading;
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26 | using System.Threading.Tasks;
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27 | using HeuristicLab.Clients.Hive;
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28 | using HeuristicLab.Common;
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29 | using HeuristicLab.Core;
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30 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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31 |
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32 | namespace HeuristicLab.HiveEngine {
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33 | /// <summary>
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34 | /// Represents an engine that executes operations which can be executed in parallel on the hive
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35 | /// </summary>
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36 | [StorableClass]
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37 | [Item("Hive Engine", "Engine for parallel execution on the hive. You need enable `Parallel` for at least one operator in your operator graph to have all childoperations parallelized. Also those childoperations must not have sideeffects on a higher scope.")]
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38 | public class HiveEngine : Engine {
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39 | private static object locker = new object();
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40 | private static object logLocker = new object();
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41 | private CancellationToken cancellationToken;
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42 | private bool firstRun = true;
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43 |
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44 | [Storable]
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45 | private IOperator currentOperator;
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46 |
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47 | [Storable]
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48 | public string ResourceNames { get; set; }
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49 |
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50 | [Storable]
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51 | private int priority;
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52 | public int Priority {
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53 | get { return priority; }
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54 | set { priority = value; }
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55 | }
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56 |
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57 | [Storable]
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58 | private TimeSpan executionTimeOnHive;
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59 | public TimeSpan ExecutionTimeOnHive {
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60 | get { return executionTimeOnHive; }
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61 | set {
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62 | if (value != executionTimeOnHive) {
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63 | executionTimeOnHive = value;
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64 | OnExecutionTimeOnHiveChanged();
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65 | }
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66 | }
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67 | }
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68 |
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69 | [Storable]
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70 | private bool useLocalPlugins;
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71 | public bool UseLocalPlugins {
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72 | get { return useLocalPlugins; }
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73 | set { useLocalPlugins = value; }
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74 | }
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75 |
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76 | // [Storable] -> HiveExperiment can't be storable, so RefreshableHiveExperiment can't be stored
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77 | private ItemCollection<RefreshableHiveExperiment> hiveExperiments = new ItemCollection<RefreshableHiveExperiment>();
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78 | public ItemCollection<RefreshableHiveExperiment> HiveExperiments {
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79 | get { return hiveExperiments; }
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80 | set { hiveExperiments = value; }
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81 | }
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82 |
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83 | private List<Plugin> onlinePlugins;
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84 | public List<Plugin> OnlinePlugins {
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85 | get { return onlinePlugins; }
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86 | set { onlinePlugins = value; }
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87 | }
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88 |
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89 | private List<Plugin> alreadyUploadedPlugins;
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90 | public List<Plugin> AlreadyUploadedPlugins {
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91 | get { return alreadyUploadedPlugins; }
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92 | set { alreadyUploadedPlugins = value; }
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93 | }
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94 |
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95 | #region constructors and cloning
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96 | public HiveEngine() {
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97 | ResourceNames = "HEAL";
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98 | Priority = 0;
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99 | }
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100 |
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101 | [StorableConstructor]
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102 | protected HiveEngine(bool deserializing) : base(deserializing) { }
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103 | protected HiveEngine(HiveEngine original, Cloner cloner)
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104 | : base(original, cloner) {
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105 | this.ResourceNames = original.ResourceNames;
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106 | this.currentOperator = cloner.Clone(original.currentOperator);
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107 | this.priority = original.priority;
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108 | this.executionTimeOnHive = original.executionTimeOnHive;
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109 | this.useLocalPlugins = original.useLocalPlugins;
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110 | // this.hiveExperiments = cloner.Clone(original.hiveExperiments); do not clone hiveExperiments - otherwise they would be sent with every job
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111 | }
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112 | public override IDeepCloneable Clone(Cloner cloner) {
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113 | return new HiveEngine(this, cloner);
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114 | }
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115 | #endregion
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116 |
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117 | #region Events
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118 | protected override void OnPrepared() {
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119 | base.OnPrepared();
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120 | this.ExecutionTimeOnHive = TimeSpan.Zero;
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121 | }
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122 |
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123 | public event EventHandler ExecutionTimeOnHiveChanged;
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124 | protected virtual void OnExecutionTimeOnHiveChanged() {
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125 | var handler = ExecutionTimeOnHiveChanged;
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126 | if (handler != null) handler(this, EventArgs.Empty);
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127 | }
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128 | #endregion
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129 |
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130 | protected override void Run(CancellationToken cancellationToken) {
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131 | this.cancellationToken = cancellationToken;
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132 | Run(ExecutionStack);
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133 | }
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134 |
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135 | private void Run(object state) {
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136 | Stack<IOperation> executionStack = (Stack<IOperation>)state;
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137 | IOperation next;
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138 | OperationCollection coll;
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139 | IAtomicOperation operation;
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140 |
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141 | if (firstRun) {
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142 | TaskScheduler.UnobservedTaskException += new EventHandler<UnobservedTaskExceptionEventArgs>(TaskScheduler_UnobservedTaskException);
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143 | this.OnlinePlugins = ServiceLocator.Instance.CallHiveService(s => s.GetPlugins()).Where(x => x.IsLocal == false).ToList();
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144 | this.AlreadyUploadedPlugins = new List<Plugin>();
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145 | firstRun = false;
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146 | }
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147 |
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148 | while (executionStack.Count > 0) {
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149 | cancellationToken.ThrowIfCancellationRequested();
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150 |
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151 | next = executionStack.Pop();
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152 | //bool isOpCollection = next is OperationCollection;
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153 | //int collCount = isOpCollection ? ((OperationCollection)next).Count : 0;
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154 | //string opName = !isOpCollection ? ((IAtomicOperation)next).Operator.Name : "OpCollection";
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155 |
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156 | if (next is OperationCollection) {
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157 | coll = (OperationCollection)next;
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158 |
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159 | //bool isPMOEvaluator = coll.Count > 0 && coll.First() is HeuristicLab.Core.ExecutionContext && ((HeuristicLab.Core.ExecutionContext)coll.First()).Operator.GetType().Name == "PMOEvaluator";
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160 | //bool isAlgorithmEvaluator = coll.Count > 0 && coll.First() is HeuristicLab.Core.ExecutionContext && ((HeuristicLab.Core.ExecutionContext)coll.First()).Operator.GetType().Name == "AlgorithmEvaluator";
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161 |
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162 | //if (coll.Parallel && isPMOEvaluator) {
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163 | // Task[] tasks = new Task[coll.Count];
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164 | // Stack<IOperation>[] stacks = new Stack<IOperation>[coll.Count];
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165 | // for (int i = 0; i < coll.Count; i++) {
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166 | // stacks[i] = new Stack<IOperation>();
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167 | // stacks[i].Push(coll[i]);
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168 | // tasks[i] = Task.Factory.StartNew(Run, stacks[i], cancellationToken);
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169 | // }
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170 | // try {
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171 | // Task.WaitAll(tasks);
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172 | // }
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173 | // catch (AggregateException ex) {
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174 | // OperationCollection remaining = new OperationCollection() { Parallel = true };
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175 | // for (int i = 0; i < stacks.Length; i++) {
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176 | // if (stacks[i].Count == 1)
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177 | // remaining.Add(stacks[i].Pop());
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178 | // if (stacks[i].Count > 1) {
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179 | // OperationCollection ops = new OperationCollection();
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180 | // while (stacks[i].Count > 0)
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181 | // ops.Add(stacks[i].Pop());
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182 | // remaining.Add(ops);
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183 | // }
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184 | // }
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185 | // if (remaining.Count > 0) executionStack.Push(remaining);
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186 | // throw ex;
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187 | // }
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188 | //} else if (coll.Parallel) {
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189 | if(coll.Parallel) {
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190 | // clone the parent scope here and reuse it for each operation. otherwise for each job the whole scope-tree first needs to be copied and then cleaned, which causes a lot of work for the Garbage Collector
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191 | IScope parentScopeClone = (IScope)((IAtomicOperation)coll.First()).Scope.Parent.Clone();
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192 | parentScopeClone.SubScopes.Clear();
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193 | parentScopeClone.ClearParentScopes();
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194 |
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195 | EngineJob[] jobs = new EngineJob[coll.Count];
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196 | for (int i = 0; i < coll.Count; i++) {
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197 | jobs[i] = new EngineJob(coll[i], new SequentialEngine.SequentialEngine());
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198 | }
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199 |
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200 | var experiment = CreateHiveExperiment();
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201 | IScope[] scopes = ExecuteOnHive(experiment, jobs, parentScopeClone, cancellationToken);
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202 | DisposeHiveExperiment(experiment);
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203 |
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204 | for (int i = 0; i < coll.Count; i++) {
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205 | if (coll[i] is IAtomicOperation) {
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206 | ExchangeScope(scopes[i], ((IAtomicOperation)coll[i]).Scope);
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207 | } else if (coll[i] is OperationCollection) {
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208 | // todo ??
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209 | }
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210 | }
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211 | } else {
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212 | for (int i = coll.Count - 1; i >= 0; i--)
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213 | if (coll[i] != null) executionStack.Push(coll[i]);
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214 | }
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215 | } else if (next is IAtomicOperation) {
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216 | operation = (IAtomicOperation)next;
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217 | try {
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218 | next = operation.Operator.Execute((IExecutionContext)operation, cancellationToken);
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219 | }
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220 | catch (Exception ex) {
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221 | executionStack.Push(operation);
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222 | if (ex is OperationCanceledException) throw ex;
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223 | else throw new OperatorExecutionException(operation.Operator, ex);
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224 | }
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225 | if (next != null) executionStack.Push(next);
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226 |
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227 | if (operation.Operator.Breakpoint) {
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228 | LogMessage(string.Format("Breakpoint: {0}", operation.Operator.Name != string.Empty ? operation.Operator.Name : operation.Operator.ItemName));
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229 | Pause();
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230 | }
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231 | }
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232 | }
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233 | }
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234 |
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235 | private void TaskScheduler_UnobservedTaskException(object sender, UnobservedTaskExceptionEventArgs e) {
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236 | e.SetObserved(); // avoid crash of process
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237 | }
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238 |
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239 | private IRandom FindRandomParameter(IExecutionContext ec) {
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240 | try {
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241 | if (ec == null)
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242 | return null;
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243 |
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244 | foreach (var p in ec.Parameters) {
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245 | if (p.Name == "Random" && p is IValueParameter)
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246 | return ((IValueParameter)p).Value as IRandom;
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247 | }
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248 | return FindRandomParameter(ec.Parent);
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249 | }
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250 | catch { return null; }
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251 | }
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252 |
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253 | private static void ReIntegrateScope(IAtomicOperation source, IAtomicOperation target) {
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254 | ExchangeScope(source.Scope, target.Scope);
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255 | }
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256 |
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257 | private static void ExchangeScope(IScope source, IScope target) {
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258 | target.Variables.Clear();
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259 | target.Variables.AddRange(source.Variables);
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260 | target.SubScopes.Clear();
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261 | target.SubScopes.AddRange(source.SubScopes);
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262 | // TODO: validate if parent scopes match - otherwise source is invalid
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263 | }
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264 |
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265 | /// <summary>
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266 | /// This method blocks until all jobs are finished
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267 | /// TODO: Cancelation needs to be refined; all tasks currently stay in Semaphore.WaitOne after cancelation
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268 | /// </summary>
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269 | /// <param name="jobs"></param>
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270 | private IScope[] ExecuteOnHive(RefreshableHiveExperiment refreshableHiveExperiment, EngineJob[] jobs, IScope parentScopeClone, CancellationToken cancellationToken) {
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271 | LogMessage(string.Format("Executing {0} operations on the hive.", jobs.Length));
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272 | IScope[] scopes = new Scope[jobs.Length];
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273 | object locker = new object();
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274 | IDictionary<Guid, int> jobIndices = new Dictionary<Guid, int>();
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275 | var hiveExperiment = refreshableHiveExperiment.HiveExperiment;
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276 |
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277 | try {
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278 | List<Guid> remainingJobIds = new List<Guid>();
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279 |
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280 | // create upload-tasks
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281 | var uploadTasks = new List<Task<Job>>();
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282 | for (int i = 0; i < jobs.Length; i++) {
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283 | hiveExperiment.HiveJobs.Add(new EngineHiveJob(jobs[i], parentScopeClone));
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284 |
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285 | // shuffle random variable to avoid the same random sequence in each operation; todo: does not yet work (it cannot find the random variable)
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286 | IRandom random = FindRandomParameter(jobs[i].InitialOperation as IExecutionContext);
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287 | if (random != null)
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288 | random.Reset(random.Next());
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289 | }
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290 | HiveClient.StartExperiment((e) => {
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291 | LogException(e);
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292 | }, refreshableHiveExperiment);
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293 |
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294 | // do polling until experiment is finished and all jobs are downloaded
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295 | while (!refreshableHiveExperiment.AllJobsFinished()) {
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296 | Thread.Sleep(500);
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297 | this.ExecutionTimeOnHive = TimeSpan.FromMilliseconds(hiveExperiments.Sum(x => x.HiveExperiment.ExecutionTime.TotalMilliseconds));
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298 | cancellationToken.ThrowIfCancellationRequested();
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299 | }
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300 | LogMessage(string.Format("{0} finished (TotalExecutionTime: {1}).", refreshableHiveExperiment.ToString(), refreshableHiveExperiment.HiveExperiment.ExecutionTime));
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301 |
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302 | // get scopes
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303 | int j = 0;
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304 | foreach (var hiveJob in hiveExperiment.HiveJobs) {
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305 | if (hiveJob.Job.State != JobState.Finished)
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306 | throw new HiveEngineException("Job failed: " + hiveJob.Job.StateLog.Last().Exception);
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307 |
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308 | var scope = ((IAtomicOperation)((EngineJob)hiveJob.ItemJob).InitialOperation).Scope;
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309 | scopes[j++] = scope;
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310 | }
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311 | return scopes;
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312 | }
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313 | catch (OperationCanceledException e) {
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314 | lock (locker) {
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315 | if (jobIndices != null) DeleteHiveExperiment(hiveExperiment.Id);
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316 | }
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317 | throw e;
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318 | }
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319 | catch (Exception e) {
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320 | lock (locker) {
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321 | if (jobIndices != null) DeleteHiveExperiment(hiveExperiment.Id);
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322 | }
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323 | LogException(e);
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324 | throw e;
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325 | }
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326 | }
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327 |
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328 | private RefreshableHiveExperiment CreateHiveExperiment() {
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329 | lock (locker) {
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330 | var hiveExperiment = new HiveExperiment();
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331 | hiveExperiment.Name = "HiveEngine Run " + hiveExperiments.Count;
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332 | hiveExperiment.DateCreated = DateTime.Now;
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333 | hiveExperiment.UseLocalPlugins = this.UseLocalPlugins;
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334 | hiveExperiment.ResourceNames = this.ResourceNames;
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335 | var refreshableHiveExperiment = new RefreshableHiveExperiment(hiveExperiment);
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336 | refreshableHiveExperiment.IsControllable = false;
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337 | hiveExperiments.Add(refreshableHiveExperiment);
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338 | return refreshableHiveExperiment;
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339 | }
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340 | }
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341 |
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342 | private void DisposeHiveExperiment(RefreshableHiveExperiment refreshableHiveExperiment) {
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343 | refreshableHiveExperiment.RefreshAutomatically = false;
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344 | DeleteHiveExperiment(refreshableHiveExperiment.HiveExperiment.Id);
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345 | ClearData(refreshableHiveExperiment);
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346 | }
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347 |
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348 | private void ClearData(RefreshableHiveExperiment refreshableHiveExperiment) {
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349 | var jobs = refreshableHiveExperiment.HiveExperiment.GetAllHiveJobs();
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350 | foreach (var job in jobs) {
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351 | job.ClearData();
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352 | }
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353 | }
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354 |
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355 | private void DeleteHiveExperiment(Guid hiveExperimentId) {
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356 | HiveClient.TryAndRepeat(() => {
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357 | ServiceLocator.Instance.CallHiveService(s => s.DeleteHiveExperiment(hiveExperimentId));
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358 | }, 5, string.Format("Could not delete jobs"));
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359 | }
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360 |
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361 | private List<Guid> GetResourceIds() {
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362 | return ServiceLocator.Instance.CallHiveService(service => {
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363 | var resourceNames = ResourceNames.Split(';');
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364 | var resourceIds = new List<Guid>();
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365 | foreach (var resourceName in resourceNames) {
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366 | Guid resourceId = service.GetResourceId(resourceName);
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367 | if (resourceId == Guid.Empty) {
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368 | throw new ResourceNotFoundException(string.Format("Could not find the resource '{0}'", resourceName));
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369 | }
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370 | resourceIds.Add(resourceId);
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371 | }
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372 | return resourceIds;
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373 | });
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374 | }
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375 |
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376 | /// <summary>
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377 | /// Threadsafe message logging
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378 | /// </summary>
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379 | private void LogMessage(string message) {
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380 | lock (logLocker) {
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381 | Log.LogMessage(message);
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382 | }
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383 | }
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384 |
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385 | /// <summary>
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386 | /// Threadsafe exception logging
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387 | /// </summary>
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388 | private void LogException(Exception exception) {
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389 | lock (logLocker) {
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390 | Log.LogException(exception);
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391 | }
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392 | }
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393 |
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394 | // testfunction:
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395 | //private IScope[] ExecuteLocally(EngineJob[] jobs, IScope parentScopeClone, CancellationToken cancellationToken) {
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396 | // IScope[] scopes = new Scope[jobs.Length];
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397 | // for (int i = 0; i < jobs.Length; i++) {
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398 | // var serialized = PersistenceUtil.Serialize(jobs[i]);
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399 | // var deserialized = PersistenceUtil.Deserialize<IJob>(serialized);
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400 | // deserialized.Start();
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401 | // while (deserialized.ExecutionState != ExecutionState.Stopped) {
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402 | // Thread.Sleep(100);
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403 | // }
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404 | // var serialized2 = PersistenceUtil.Serialize(deserialized);
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405 | // var deserialized2 = PersistenceUtil.Deserialize<EngineJob>(serialized2);
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406 | // var newScope = ((IAtomicOperation)deserialized2.InitialOperation).Scope;
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407 | // scopes[i] = newScope;
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408 | // }
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409 | // return scopes;
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410 | //}
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411 | }
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412 | }
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