1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2016 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.Threading;
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24 | using HeuristicLab.Common;
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25 | using HeuristicLab.Core;
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26 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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27 |
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28 | namespace HeuristicLab.Scripting {
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29 | [Item("Executable Script", "An executable script.")]
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30 | [StorableClass]
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31 | public abstract class ExecutableScript : Script {
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32 | private Thread scriptThread;
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33 | private DateTime lastUpdateTime;
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34 |
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35 | [Storable]
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36 | private TimeSpan executionTime;
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37 | public TimeSpan ExecutionTime {
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38 | get { return executionTime; }
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39 | protected set {
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40 | executionTime = value;
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41 | OnExecutionTimeChanged();
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42 | }
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43 | }
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44 |
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45 | public bool Running { get; protected set; }
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46 |
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47 | #region Construction & Cloning
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48 | [StorableConstructor]
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49 | protected ExecutableScript(bool deserializing) : base(deserializing) { }
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50 | protected ExecutableScript(ExecutableScript original, Cloner cloner)
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51 | : base(original, cloner) {
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52 | executionTime = original.executionTime;
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53 | }
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54 | protected ExecutableScript()
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55 | : base() {
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56 | executionTime = TimeSpan.Zero;
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57 | }
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58 | protected ExecutableScript(string code)
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59 | : base(code) {
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60 | executionTime = TimeSpan.Zero;
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61 | }
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62 | #endregion
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63 |
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64 | #region Execution
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65 | protected abstract void ExecuteCode();
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66 |
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67 | public virtual void Execute() {
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68 | if (Running)
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69 | throw new InvalidOperationException("Script is already running");
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70 |
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71 | ExecutionTime = TimeSpan.Zero;
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72 | Exception ex = null;
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73 | var timer = new System.Timers.Timer(250) { AutoReset = true };
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74 | timer.Elapsed += timer_Elapsed;
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75 | try {
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76 | Running = true;
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77 | OnScriptExecutionStarted();
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78 | lastUpdateTime = DateTime.UtcNow;
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79 | timer.Start();
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80 | ExecuteCode();
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81 | } catch (Exception e) {
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82 | ex = e;
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83 | } finally {
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84 | timer.Elapsed -= timer_Elapsed;
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85 | timer.Stop();
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86 | timer.Dispose();
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87 | ExecutionTime += DateTime.UtcNow - lastUpdateTime;
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88 | Running = false;
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89 | OnScriptExecutionFinished(ex);
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90 | }
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91 | }
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92 |
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93 | public virtual void ExecuteAsync() {
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94 | scriptThread = new Thread(() => {
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95 | try {
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96 | Execute();
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97 | } finally {
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98 | scriptThread = null;
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99 | }
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100 | });
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101 | scriptThread.SetApartmentState(ApartmentState.STA);
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102 | scriptThread.Start();
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103 | }
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104 |
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105 | public virtual void Kill() {
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106 | if (!Running) return;
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107 |
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108 | scriptThread.Abort();
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109 | }
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110 | #endregion
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111 |
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112 | private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) {
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113 | var timer = (System.Timers.Timer)sender;
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114 | timer.Enabled = false;
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115 | DateTime now = DateTime.UtcNow;
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116 | ExecutionTime += now - lastUpdateTime;
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117 | lastUpdateTime = now;
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118 | timer.Enabled = true;
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119 | }
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120 |
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121 | public event EventHandler ScriptExecutionStarted;
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122 | protected virtual void OnScriptExecutionStarted() {
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123 | var handler = ScriptExecutionStarted;
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124 | if (handler != null) handler(this, EventArgs.Empty);
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125 | }
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126 |
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127 | public event EventHandler<EventArgs<Exception>> ScriptExecutionFinished;
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128 | protected virtual void OnScriptExecutionFinished(Exception e) {
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129 | var handler = ScriptExecutionFinished;
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130 | if (handler != null) handler(this, new EventArgs<Exception>(e));
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131 | }
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132 |
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133 | public event EventHandler ExecutionTimeChanged;
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134 | protected virtual void OnExecutionTimeChanged() {
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135 | var handler = ExecutionTimeChanged;
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136 | if (handler != null) handler(this, EventArgs.Empty);
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137 | }
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138 | }
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139 | }
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