Mercurial > hg > orthanc
annotate Plugins/Engine/PluginsManager.cpp @ 2132:a43708636890
ErrorCode_NotEnoughMemory and ErrorCode_NullPointer
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 09 Nov 2016 10:19:53 +0100 |
parents | 0af087300b26 |
children | dd609a99d39a |
rev | line source |
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887 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
1900 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
887 | 5 * |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU General Public License as | |
8 * published by the Free Software Foundation, either version 3 of the | |
9 * License, or (at your option) any later version. | |
10 * | |
11 * In addition, as a special exception, the copyright holders of this | |
12 * program give permission to link the code of its release with the | |
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
14 * that use the same license as the "OpenSSL" library), and distribute | |
15 * the linked executables. You must obey the GNU General Public License | |
16 * in all respects for all of the code used other than "OpenSSL". If you | |
17 * modify file(s) with this exception, you may extend this exception to | |
18 * your version of the file(s), but you are not obligated to do so. If | |
19 * you do not wish to do so, delete this exception statement from your | |
20 * version. If you delete this exception statement from all source files | |
21 * in the program, then also delete it here. | |
22 * | |
23 * This program is distributed in the hope that it will be useful, but | |
24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
26 * General Public License for more details. | |
27 * | |
28 * You should have received a copy of the GNU General Public License | |
29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
30 **/ | |
31 | |
32 | |
1625 | 33 #include "../../OrthancServer/PrecompiledHeadersServer.h" |
887 | 34 #include "PluginsManager.h" |
35 | |
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36 #if ORTHANC_PLUGINS_ENABLED != 1 |
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37 #error The plugin support is disabled |
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38 #endif |
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39 |
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40 |
894 | 41 #include "../../Core/Toolbox.h" |
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42 #include "../../Core/HttpServer/HttpOutput.h" |
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43 #include "../../Core/Logging.h" |
894 | 44 |
887 | 45 #include <cassert> |
46 #include <memory> | |
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47 #include <boost/filesystem.hpp> |
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48 |
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49 #ifdef WIN32 |
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50 #define PLUGIN_EXTENSION ".dll" |
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51 #elif defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) |
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52 #define PLUGIN_EXTENSION ".so" |
1026 | 53 #elif defined(__APPLE__) && defined(__MACH__) |
54 #define PLUGIN_EXTENSION ".dylib" | |
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55 #else |
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56 #error Support your platform here |
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57 #endif |
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58 |
887 | 59 |
60 namespace Orthanc | |
61 { | |
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62 PluginsManager::Plugin::Plugin(PluginsManager& pluginManager, |
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63 const std::string& path) : |
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64 library_(path), |
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65 pluginManager_(pluginManager) |
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66 { |
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67 memset(&context_, 0, sizeof(context_)); |
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68 context_.pluginsManager = this; |
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69 context_.orthancVersion = ORTHANC_VERSION; |
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70 context_.Free = ::free; |
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71 context_.InvokeService = InvokeService; |
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72 } |
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73 |
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74 |
887 | 75 static void CallInitialize(SharedLibrary& plugin, |
76 const OrthancPluginContext& context) | |
77 { | |
78 typedef int32_t (*Initialize) (const OrthancPluginContext*); | |
79 | |
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80 #if defined(_WIN32) |
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81 Initialize initialize = (Initialize) plugin.GetFunction("OrthancPluginInitialize"); |
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82 #else |
887 | 83 /** |
84 * gcc would complain about "ISO C++ forbids casting between | |
85 * pointer-to-function and pointer-to-object" without the trick | |
86 * below, that is known as "the POSIX.1-2003 (Technical Corrigendum | |
87 * 1) workaround". See the man page of "dlsym()". | |
88 * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/ | |
89 * http://stackoverflow.com/a/14543811/881731 | |
90 **/ | |
91 | |
92 Initialize initialize; | |
93 *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize"); | |
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94 #endif |
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95 |
887 | 96 assert(initialize != NULL); |
97 int32_t error = initialize(&context); | |
98 | |
99 if (error != 0) | |
100 { | |
101 LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath() | |
102 << " (code " << error << ")"; | |
103 throw OrthancException(ErrorCode_SharedLibrary); | |
104 } | |
105 } | |
106 | |
107 | |
108 static void CallFinalize(SharedLibrary& plugin) | |
109 { | |
110 typedef void (*Finalize) (); | |
111 | |
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112 #if defined(_WIN32) |
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113 Finalize finalize = (Finalize) plugin.GetFunction("OrthancPluginFinalize"); |
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114 #else |
887 | 115 Finalize finalize; |
116 *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize"); | |
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117 #endif |
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118 |
887 | 119 assert(finalize != NULL); |
120 finalize(); | |
121 } | |
122 | |
123 | |
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124 static const char* CallGetName(SharedLibrary& plugin) |
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125 { |
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126 typedef const char* (*GetName) (); |
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127 |
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128 #if defined(_WIN32) |
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129 GetName getName = (GetName) plugin.GetFunction("OrthancPluginGetName"); |
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130 #else |
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131 GetName getName; |
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132 *(void **) (&getName) = plugin.GetFunction("OrthancPluginGetName"); |
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133 #endif |
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134 |
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135 assert(getName != NULL); |
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136 return getName(); |
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137 } |
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138 |
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139 |
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140 static const char* CallGetVersion(SharedLibrary& plugin) |
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141 { |
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142 typedef const char* (*GetVersion) (); |
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143 |
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144 #if defined(_WIN32) |
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145 GetVersion getVersion = (GetVersion) plugin.GetFunction("OrthancPluginGetVersion"); |
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146 #else |
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147 GetVersion getVersion; |
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148 *(void **) (&getVersion) = plugin.GetFunction("OrthancPluginGetVersion"); |
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149 #endif |
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150 |
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151 assert(getVersion != NULL); |
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152 return getVersion(); |
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153 } |
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154 |
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155 |
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156 OrthancPluginErrorCode PluginsManager::InvokeService(OrthancPluginContext* context, |
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157 _OrthancPluginService service, |
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158 const void* params) |
887 | 159 { |
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160 switch (service) |
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161 { |
907 | 162 case _OrthancPluginService_LogError: |
899 | 163 LOG(ERROR) << reinterpret_cast<const char*>(params); |
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164 return OrthancPluginErrorCode_Success; |
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165 |
907 | 166 case _OrthancPluginService_LogWarning: |
899 | 167 LOG(WARNING) << reinterpret_cast<const char*>(params); |
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168 return OrthancPluginErrorCode_Success; |
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169 |
907 | 170 case _OrthancPluginService_LogInfo: |
899 | 171 LOG(INFO) << reinterpret_cast<const char*>(params); |
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172 return OrthancPluginErrorCode_Success; |
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173 |
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174 default: |
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175 break; |
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176 } |
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177 |
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178 Plugin* that = reinterpret_cast<Plugin*>(context->pluginsManager); |
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179 |
899 | 180 for (std::list<IPluginServiceProvider*>::iterator |
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181 it = that->GetPluginManager().serviceProviders_.begin(); |
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182 it != that->GetPluginManager().serviceProviders_.end(); ++it) |
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183 { |
899 | 184 try |
185 { | |
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186 if ((*it)->InvokeService(that->GetSharedLibrary(), service, params)) |
899 | 187 { |
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188 return OrthancPluginErrorCode_Success; |
899 | 189 } |
190 } | |
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191 catch (OrthancException& e) |
899 | 192 { |
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193 // This service provider has failed |
1983 | 194 if (e.GetErrorCode() != ErrorCode_UnknownResource) // This error code is valid in plugins |
195 { | |
196 LOG(ERROR) << "Exception while invoking plugin service " << service << ": " << e.What(); | |
197 } | |
198 | |
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199 return static_cast<OrthancPluginErrorCode>(e.GetErrorCode()); |
899 | 200 } |
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201 } |
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202 |
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203 LOG(ERROR) << "Plugin invoking unknown service: " << service; |
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204 return OrthancPluginErrorCode_UnknownPluginService; |
887 | 205 } |
206 | |
207 | |
899 | 208 PluginsManager::PluginsManager() |
887 | 209 { |
210 } | |
211 | |
212 PluginsManager::~PluginsManager() | |
213 { | |
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214 for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); ++it) |
887 | 215 { |
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216 if (it->second != NULL) |
887 | 217 { |
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218 LOG(WARNING) << "Unregistering plugin '" << it->first |
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219 << "' (version " << it->second->GetVersion() << ")"; |
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220 |
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221 CallFinalize(it->second->GetSharedLibrary()); |
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222 delete it->second; |
887 | 223 } |
224 } | |
225 } | |
226 | |
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227 |
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228 static bool IsOrthancPlugin(SharedLibrary& library) |
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229 { |
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230 return (library.HasFunction("OrthancPluginInitialize") && |
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231 library.HasFunction("OrthancPluginFinalize") && |
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232 library.HasFunction("OrthancPluginGetName") && |
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233 library.HasFunction("OrthancPluginGetVersion")); |
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234 } |
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235 |
887 | 236 |
237 void PluginsManager::RegisterPlugin(const std::string& path) | |
238 { | |
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239 if (!boost::filesystem::exists(path)) |
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240 { |
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241 LOG(ERROR) << "Inexistent path to plugins: " << path; |
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242 return; |
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243 } |
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244 |
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245 if (boost::filesystem::is_directory(path)) |
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246 { |
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247 ScanFolderForPlugins(path, false); |
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248 return; |
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249 } |
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250 |
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251 std::auto_ptr<Plugin> plugin(new Plugin(*this, path)); |
887 | 252 |
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253 if (!IsOrthancPlugin(plugin->GetSharedLibrary())) |
887 | 254 { |
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255 LOG(ERROR) << "Plugin " << plugin->GetSharedLibrary().GetPath() |
887 | 256 << " does not declare the proper entry functions"; |
257 throw OrthancException(ErrorCode_SharedLibrary); | |
258 } | |
259 | |
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260 std::string name(CallGetName(plugin->GetSharedLibrary())); |
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261 if (plugins_.find(name) != plugins_.end()) |
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262 { |
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263 LOG(ERROR) << "Plugin '" << name << "' already registered"; |
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264 throw OrthancException(ErrorCode_SharedLibrary); |
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265 } |
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266 |
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267 plugin->SetVersion(CallGetVersion(plugin->GetSharedLibrary())); |
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268 LOG(WARNING) << "Registering plugin '" << name |
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269 << "' (version " << plugin->GetVersion() << ")"; |
887 | 270 |
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271 CallInitialize(plugin->GetSharedLibrary(), plugin->GetContext()); |
887 | 272 |
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273 plugins_[name] = plugin.release(); |
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274 } |
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275 |
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276 |
889 | 277 void PluginsManager::ScanFolderForPlugins(const std::string& folder, |
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278 bool isRecursive) |
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279 { |
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280 using namespace boost::filesystem; |
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281 |
889 | 282 if (!exists(folder)) |
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283 { |
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284 return; |
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285 } |
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286 |
889 | 287 LOG(INFO) << "Scanning folder " << folder << " for plugins"; |
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288 |
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289 directory_iterator end_it; // default construction yields past-the-end |
889 | 290 for (directory_iterator it(folder); |
888
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291 it != end_it; |
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292 ++it) |
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293 { |
889 | 294 std::string path = it->path().string(); |
295 | |
888
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296 if (is_directory(it->status())) |
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297 { |
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298 if (isRecursive) |
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299 { |
889 | 300 ScanFolderForPlugins(path, true); |
888
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301 } |
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302 } |
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303 else |
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304 { |
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305 std::string extension = boost::filesystem::extension(it->path()); |
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306 Toolbox::ToLowerCase(extension); |
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307 |
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308 if (extension == PLUGIN_EXTENSION) |
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309 { |
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310 LOG(INFO) << "Found a shared library: " << it->path(); |
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311 |
1297 | 312 SharedLibrary plugin(path); |
313 if (IsOrthancPlugin(plugin)) | |
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314 { |
1297 | 315 RegisterPlugin(path); |
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316 } |
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317 } |
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318 } |
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319 } |
887 | 320 } |
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321 |
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322 |
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323 void PluginsManager::ListPlugins(std::list<std::string>& result) const |
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324 { |
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325 result.clear(); |
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326 |
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327 for (Plugins::const_iterator it = plugins_.begin(); |
1304 | 328 it != plugins_.end(); ++it) |
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329 { |
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330 result.push_back(it->first); |
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331 } |
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332 } |
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333 |
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334 |
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335 bool PluginsManager::HasPlugin(const std::string& name) const |
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336 { |
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337 return plugins_.find(name) != plugins_.end(); |
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338 } |
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339 |
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340 |
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341 const std::string& PluginsManager::GetPluginVersion(const std::string& name) const |
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342 { |
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343 Plugins::const_iterator it = plugins_.find(name); |
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344 if (it == plugins_.end()) |
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345 { |
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346 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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347 } |
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348 else |
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349 { |
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350 return it->second->GetVersion(); |
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351 } |
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352 } |
1644
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353 |
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354 |
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355 std::string PluginsManager::GetPluginName(SharedLibrary& library) |
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356 { |
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357 return CallGetName(library); |
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358 } |
887 | 359 } |