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-rw-r--r--OpenSim/Region/Framework/ModuleLoader.cs262
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diff --git a/OpenSim/Region/Framework/ModuleLoader.cs b/OpenSim/Region/Framework/ModuleLoader.cs
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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSimulator Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29using System.Collections.Generic;
30using System.IO;
31using System.Reflection;
32using log4net;
33using Nini.Config;
34using OpenSim.Region.Framework.Interfaces;
35using OpenSim.Region.Framework.Scenes;
36
37namespace OpenSim.Region.Framework
38{
39 public class ModuleLoader
40 {
41 private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
42
43 public Dictionary<string, Assembly> LoadedAssemblys = new Dictionary<string, Assembly>();
44
45 private readonly List<IRegionModule> m_loadedModules = new List<IRegionModule>();
46 private readonly Dictionary<string, IRegionModule> m_loadedSharedModules = new Dictionary<string, IRegionModule>();
47 private readonly IConfigSource m_config;
48
49 public ModuleLoader(IConfigSource config)
50 {
51 m_config = config;
52 }
53
54 public IRegionModule[] GetLoadedSharedModules
55 {
56 get
57 {
58 IRegionModule[] regionModules = new IRegionModule[m_loadedSharedModules.Count];
59 m_loadedSharedModules.Values.CopyTo(regionModules, 0);
60 return regionModules;
61 }
62 }
63
64 public List<IRegionModule> PickupModules(Scene scene, string moduleDir)
65 {
66 DirectoryInfo dir = new DirectoryInfo(moduleDir);
67 List<IRegionModule> modules = new List<IRegionModule>();
68
69 foreach (FileInfo fileInfo in dir.GetFiles("*.dll"))
70 {
71 modules.AddRange(LoadRegionModules(fileInfo.FullName, scene));
72 }
73 return modules;
74 }
75
76 public void LoadDefaultSharedModule(IRegionModule module)
77 {
78 if (m_loadedSharedModules.ContainsKey(module.Name))
79 {
80 m_log.ErrorFormat("[MODULES]: Module name \"{0}\" already exists in module list. Module not added!", module.Name);
81 }
82 else
83 {
84 m_loadedSharedModules.Add(module.Name, module);
85 }
86 }
87
88
89 public void InitialiseSharedModules(Scene scene)
90 {
91 foreach (IRegionModule module in m_loadedSharedModules.Values)
92 {
93 module.Initialise(scene, m_config);
94 scene.AddModule(module.Name, module); //should be doing this?
95 }
96 }
97
98 public void InitializeModule(IRegionModule module, Scene scene)
99 {
100 module.Initialise(scene, m_config);
101 scene.AddModule(module.Name, module);
102 m_loadedModules.Add(module);
103 }
104
105 /// <summary>
106 /// Loads/initialises a Module instance that can be used by multiple Regions
107 /// </summary>
108 /// <param name="dllName"></param>
109 /// <param name="moduleName"></param>
110 public void LoadSharedModule(string dllName, string moduleName)
111 {
112 IRegionModule module = LoadModule(dllName, moduleName);
113
114 if (module != null)
115 LoadSharedModule(module);
116 }
117
118 /// <summary>
119 /// Loads/initialises a Module instance that can be used by multiple Regions
120 /// </summary>
121 /// <param name="module"></param>
122 public void LoadSharedModule(IRegionModule module)
123 {
124 if (!m_loadedSharedModules.ContainsKey(module.Name))
125 {
126 m_loadedSharedModules.Add(module.Name, module);
127 }
128 }
129
130 public List<IRegionModule> LoadRegionModules(string dllName, Scene scene)
131 {
132 IRegionModule[] modules = LoadModules(dllName);
133 List<IRegionModule> initializedModules = new List<IRegionModule>();
134
135 if (modules.Length > 0)
136 {
137 m_log.InfoFormat("[MODULES]: Found Module Library [{0}]", dllName);
138 foreach (IRegionModule module in modules)
139 {
140 if (!module.IsSharedModule)
141 {
142 m_log.InfoFormat("[MODULES]: [{0}]: Initializing.", module.Name);
143 InitializeModule(module, scene);
144 initializedModules.Add(module);
145 }
146 else
147 {
148 m_log.InfoFormat("[MODULES]: [{0}]: Loading Shared Module.", module.Name);
149 LoadSharedModule(module);
150 }
151 }
152 }
153 return initializedModules;
154 }
155
156 public void LoadRegionModule(string dllName, string moduleName, Scene scene)
157 {
158 IRegionModule module = LoadModule(dllName, moduleName);
159 if (module != null)
160 {
161 InitializeModule(module, scene);
162 }
163 }
164
165 /// <summary>
166 /// Loads a external Module (if not already loaded) and creates a new instance of it.
167 /// </summary>
168 /// <param name="dllName"></param>
169 /// <param name="moduleName"></param>
170 public IRegionModule LoadModule(string dllName, string moduleName)
171 {
172 IRegionModule[] modules = LoadModules(dllName);
173
174 foreach (IRegionModule module in modules)
175 {
176 if ((module != null) && (module.Name == moduleName))
177 {
178 return module;
179 }
180 }
181
182 return null;
183 }
184
185 public IRegionModule[] LoadModules(string dllName)
186 {
187 //m_log.DebugFormat("[MODULES]: Looking for modules in {0}", dllName);
188
189 List<IRegionModule> modules = new List<IRegionModule>();
190
191 Assembly pluginAssembly;
192 if (!LoadedAssemblys.TryGetValue(dllName, out pluginAssembly))
193 {
194 try
195 {
196 pluginAssembly = Assembly.LoadFrom(dllName);
197 LoadedAssemblys.Add(dllName, pluginAssembly);
198 }
199 catch (BadImageFormatException)
200 {
201 //m_log.InfoFormat("[MODULES]: The file [{0}] is not a module assembly.", e.FileName);
202 }
203 }
204
205 if (pluginAssembly != null)
206 {
207 try
208 {
209 foreach (Type pluginType in pluginAssembly.GetTypes())
210 {
211 if (pluginType.IsPublic)
212 {
213 if (!pluginType.IsAbstract)
214 {
215 if (pluginType.GetInterface("IRegionModule") != null)
216 {
217 modules.Add((IRegionModule)Activator.CreateInstance(pluginType));
218 }
219 }
220 }
221 }
222 }
223 catch (Exception e)
224 {
225 m_log.ErrorFormat(
226 "[MODULES]: Could not load types for plugin DLL {0}. Exception {1} {2}",
227 pluginAssembly.FullName, e.Message, e.StackTrace);
228
229 // justincc: Right now this is fatal to really get the user's attention
230 throw e;
231 }
232 }
233
234 return modules.ToArray();
235 }
236
237 public void PostInitialise()
238 {
239 foreach (IRegionModule module in m_loadedSharedModules.Values)
240 {
241 module.PostInitialise();
242 }
243
244 foreach (IRegionModule module in m_loadedModules)
245 {
246 module.PostInitialise();
247 }
248 }
249
250 public void ClearCache()
251 {
252 LoadedAssemblys.Clear();
253 }
254
255 public void UnloadModule(IRegionModule rm)
256 {
257 rm.Close();
258
259 m_loadedModules.Remove(rm);
260 }
261 }
262}
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