1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2008 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.Security.Policy;
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25 | using System.Reflection;
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26 | using System.Diagnostics;
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27 | using System.Security.Permissions;
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28 | using System.Security;
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29 | using System.Linq;
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30 |
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31 | namespace HeuristicLab.PluginInfrastructure.Manager {
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32 |
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33 | // must extend MarshalByRefObject because of event passing between Loader and PluginManager (each in it's own AppDomain)
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34 | /// <summary>
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35 | /// Class to manage different plugins.
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36 | /// </summary>
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37 | public class PluginManager : MarshalByRefObject {
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38 | /// <summary>
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39 | /// Event handler for actions in the plugin manager.
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40 | /// </summary>
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41 | public event EventHandler<PluginInfrastructureEventArgs> Action;
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42 |
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43 | private string pluginDir;
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44 |
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45 | public PluginManager(string pluginDir) {
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46 | this.pluginDir = pluginDir;
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47 | }
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48 |
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49 | private List<PluginDescription> plugins;
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50 |
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51 | private List<ApplicationDescription> applications;
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52 | /// <summary>
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53 | /// Gets all installed applications.
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54 | /// </summary>
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55 | public IEnumerable<ApplicationDescription> Applications {
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56 | get { return applications; }
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57 | }
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58 |
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59 | /// <summary>
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60 | /// Determines installed plugins and checks if all plugins are loadable.
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61 | /// </summary>
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62 | public void DiscoverAndCheckPlugins() {
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63 | FireAction("Initializing", "PluginInfrastructure");
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64 | AppDomainSetup setup = AppDomain.CurrentDomain.SetupInformation;
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65 | setup.PrivateBinPath = pluginDir;
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66 | AppDomain pluginDomain = null;
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67 | try {
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68 | pluginDomain = AppDomain.CreateDomain("plugin domain", null, setup);
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69 | Loader remoteLoader = (Loader)pluginDomain.CreateInstanceAndUnwrap("HeuristicLab.PluginInfraStructure.Manager", "HeuristicLab.PluginInfrastructure.Manager.Loader");
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70 | remoteLoader.PluginDir = pluginDir;
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71 | // forward all events from the remoteLoader to listeners
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72 | remoteLoader.PluginLoaded += delegate(object sender, PluginInfrastructureEventArgs args) { FireAction(args.Action, args.Entity); };
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73 | this.plugins = new List<PluginDescription>(remoteLoader.Plugins);
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74 | this.applications = new List<ApplicationDescription>(remoteLoader.Applications);
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75 | FireAction("Initialized", "PluginInfrastructure");
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76 | }
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77 | finally {
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78 | // discard the AppDomain that was used for plugin discovery
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79 | UnloadAppDomain(pluginDomain);
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80 | }
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81 | }
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82 |
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83 |
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84 | /// <summary>
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85 | /// Creates a separate AppDomain.
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86 | /// Loads all active plugin assemblies and starts the application in the new AppDomain via a PluginRunner instance activated in the new AppDomain
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87 | /// </summary>
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88 | /// <param name="appInfo">application to run</param>
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89 | public void Run(ApplicationDescription appInfo) {
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90 | // create a separate AppDomain for the application
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91 | // initialize the static ApplicationManager in the AppDomain
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92 | // and remotely tell it to start the application
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93 |
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94 | FireAction("Starting application", appInfo.Name);
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95 | AppDomain applicationDomain = null;
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96 | try {
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97 | AppDomainSetup setup = AppDomain.CurrentDomain.SetupInformation;
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98 | setup.PrivateBinPath = pluginDir;
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99 | applicationDomain = AppDomain.CreateDomain(appInfo.Name, null, setup);
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100 | DefaultApplicationManager applicationManager =
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101 | (DefaultApplicationManager)applicationDomain.CreateInstanceAndUnwrap("HeuristicLab.PluginInfraStructure.Manager", "HeuristicLab.PluginInfrastructure.Manager.DefaultApplicationManager");
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102 | applicationManager.PluginLoaded += applicationManager_PluginLoaded;
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103 | applicationManager.PrepareApplicationDomain(
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104 | new List<IApplicationDescription>(applications.Cast<IApplicationDescription>()),
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105 | new List<IPluginDescription>(plugins.Cast<IPluginDescription>()));
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106 | FireAction("Started application", appInfo.Name);
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107 | applicationManager.Run(appInfo);
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108 | }
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109 | finally {
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110 | // make sure domain is unloaded in all cases
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111 | UnloadAppDomain(applicationDomain);
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112 | }
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113 | }
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114 |
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115 | void applicationManager_PluginLoaded(object sender, PluginInfrastructureEventArgs e) {
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116 | // load the matching plugin description (
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117 | PluginDescription desc = (PluginDescription)e.Entity;
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118 | foreach (var myDesc in plugins) {
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119 | if (myDesc.Equals(desc)) myDesc.Load();
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120 | }
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121 | FireAction(e.Action, e.Entity);
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122 | }
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123 |
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124 | private void UnloadAppDomain(AppDomain appDomain) {
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125 | AppDomain.Unload(appDomain);
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126 |
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127 | // TODO: Update plugin descriptions in all active AppDomains
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128 |
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129 | // unload all plugins
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130 | foreach (var pluginDescription in plugins)
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131 | pluginDescription.Unload();
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132 | }
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133 |
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134 | private void FireAction(string action, object entity) {
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135 | if (Action != null) {
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136 | Action(this, new PluginInfrastructureEventArgs(action, entity));
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137 | }
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138 | }
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139 | }
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140 | }
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