Mercurial > hg > orthanc
annotate Plugins/Engine/PluginsManager.cpp @ 1624:0a2ad4a6858f
fix missing precompiled headers
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 18 Sep 2015 12:37:58 +0200 |
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rev | line source |
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887 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
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3 * Copyright (C) 2012-2015 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 | |
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33 #include "../../Core/PrecompiledHeaders.h" |
887 | 34 #include "PluginsManager.h" |
35 | |
894 | 36 #include "../../Core/Toolbox.h" |
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37 #include "../../Core/HttpServer/HttpOutput.h" |
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38 #include "../../Core/Logging.h" |
894 | 39 |
887 | 40 #include <cassert> |
41 #include <memory> | |
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42 #include <boost/filesystem.hpp> |
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43 |
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44 #ifdef WIN32 |
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45 #define PLUGIN_EXTENSION ".dll" |
1337 | 46 #elif defined(__linux) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) |
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47 #define PLUGIN_EXTENSION ".so" |
1026 | 48 #elif defined(__APPLE__) && defined(__MACH__) |
49 #define PLUGIN_EXTENSION ".dylib" | |
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50 #else |
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51 #error Support your platform here |
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52 #endif |
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53 |
887 | 54 |
55 namespace Orthanc | |
56 { | |
57 static void CallInitialize(SharedLibrary& plugin, | |
58 const OrthancPluginContext& context) | |
59 { | |
60 typedef int32_t (*Initialize) (const OrthancPluginContext*); | |
61 | |
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62 #if defined(_WIN32) |
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63 Initialize initialize = (Initialize) plugin.GetFunction("OrthancPluginInitialize"); |
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64 #else |
887 | 65 /** |
66 * gcc would complain about "ISO C++ forbids casting between | |
67 * pointer-to-function and pointer-to-object" without the trick | |
68 * below, that is known as "the POSIX.1-2003 (Technical Corrigendum | |
69 * 1) workaround". See the man page of "dlsym()". | |
70 * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/ | |
71 * http://stackoverflow.com/a/14543811/881731 | |
72 **/ | |
73 | |
74 Initialize initialize; | |
75 *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize"); | |
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76 #endif |
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77 |
887 | 78 assert(initialize != NULL); |
79 int32_t error = initialize(&context); | |
80 | |
81 if (error != 0) | |
82 { | |
83 LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath() | |
84 << " (code " << error << ")"; | |
85 throw OrthancException(ErrorCode_SharedLibrary); | |
86 } | |
87 } | |
88 | |
89 | |
90 static void CallFinalize(SharedLibrary& plugin) | |
91 { | |
92 typedef void (*Finalize) (); | |
93 | |
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94 #if defined(_WIN32) |
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95 Finalize finalize = (Finalize) plugin.GetFunction("OrthancPluginFinalize"); |
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96 #else |
887 | 97 Finalize finalize; |
98 *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize"); | |
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99 #endif |
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100 |
887 | 101 assert(finalize != NULL); |
102 finalize(); | |
103 } | |
104 | |
105 | |
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106 static const char* CallGetName(SharedLibrary& plugin) |
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107 { |
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108 typedef const char* (*GetName) (); |
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109 |
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110 #if defined(_WIN32) |
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111 GetName getName = (GetName) plugin.GetFunction("OrthancPluginGetName"); |
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112 #else |
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113 GetName getName; |
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114 *(void **) (&getName) = plugin.GetFunction("OrthancPluginGetName"); |
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115 #endif |
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116 |
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117 assert(getName != NULL); |
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118 return getName(); |
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119 } |
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120 |
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121 |
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122 static const char* CallGetVersion(SharedLibrary& plugin) |
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123 { |
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124 typedef const char* (*GetVersion) (); |
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125 |
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126 #if defined(_WIN32) |
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127 GetVersion getVersion = (GetVersion) plugin.GetFunction("OrthancPluginGetVersion"); |
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128 #else |
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129 GetVersion getVersion; |
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130 *(void **) (&getVersion) = plugin.GetFunction("OrthancPluginGetVersion"); |
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131 #endif |
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132 |
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133 assert(getVersion != NULL); |
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134 return getVersion(); |
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135 } |
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136 |
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137 |
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138 OrthancPluginErrorCode PluginsManager::InvokeService(OrthancPluginContext* context, |
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139 _OrthancPluginService service, |
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140 const void* params) |
887 | 141 { |
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142 switch (service) |
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143 { |
907 | 144 case _OrthancPluginService_LogError: |
899 | 145 LOG(ERROR) << reinterpret_cast<const char*>(params); |
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146 return OrthancPluginErrorCode_Success; |
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147 |
907 | 148 case _OrthancPluginService_LogWarning: |
899 | 149 LOG(WARNING) << reinterpret_cast<const char*>(params); |
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150 return OrthancPluginErrorCode_Success; |
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151 |
907 | 152 case _OrthancPluginService_LogInfo: |
899 | 153 LOG(INFO) << reinterpret_cast<const char*>(params); |
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154 return OrthancPluginErrorCode_Success; |
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155 |
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156 default: |
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157 break; |
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158 } |
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159 |
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160 PluginsManager* that = reinterpret_cast<PluginsManager*>(context->pluginsManager); |
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161 |
899 | 162 for (std::list<IPluginServiceProvider*>::iterator |
163 it = that->serviceProviders_.begin(); | |
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164 it != that->serviceProviders_.end(); ++it) |
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165 { |
899 | 166 try |
167 { | |
168 if ((*it)->InvokeService(service, params)) | |
169 { | |
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170 return OrthancPluginErrorCode_Success; |
899 | 171 } |
172 } | |
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173 catch (OrthancException& e) |
899 | 174 { |
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175 // This service provider has failed |
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176 LOG(ERROR) << "Exception while invoking a plugin service: " << e.What(); |
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177 return static_cast<OrthancPluginErrorCode>(e.GetErrorCode()); |
899 | 178 } |
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179 } |
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180 |
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181 LOG(ERROR) << "Plugin invoking unknown service: " << service; |
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182 return OrthancPluginErrorCode_UnknownPluginService; |
887 | 183 } |
184 | |
185 | |
899 | 186 PluginsManager::PluginsManager() |
887 | 187 { |
894 | 188 memset(&context_, 0, sizeof(context_)); |
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189 context_.pluginsManager = this; |
887 | 190 context_.orthancVersion = ORTHANC_VERSION; |
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191 context_.Free = ::free; |
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192 context_.InvokeService = InvokeService; |
887 | 193 } |
194 | |
195 PluginsManager::~PluginsManager() | |
196 { | |
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197 for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); ++it) |
887 | 198 { |
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199 if (it->second != NULL) |
887 | 200 { |
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201 LOG(WARNING) << "Unregistering plugin '" << it->first |
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202 << "' (version " << it->second->GetVersion() << ")"; |
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203 |
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204 CallFinalize(it->second->GetLibrary()); |
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205 delete it->second; |
887 | 206 } |
207 } | |
208 } | |
209 | |
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210 |
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211 static bool IsOrthancPlugin(SharedLibrary& library) |
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212 { |
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213 return (library.HasFunction("OrthancPluginInitialize") && |
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214 library.HasFunction("OrthancPluginFinalize") && |
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215 library.HasFunction("OrthancPluginGetName") && |
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216 library.HasFunction("OrthancPluginGetVersion")); |
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217 } |
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218 |
887 | 219 |
220 void PluginsManager::RegisterPlugin(const std::string& path) | |
221 { | |
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222 if (!boost::filesystem::exists(path)) |
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223 { |
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224 LOG(ERROR) << "Inexistent path to plugins: " << path; |
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225 return; |
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226 } |
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227 |
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228 if (boost::filesystem::is_directory(path)) |
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229 { |
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230 ScanFolderForPlugins(path, false); |
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231 return; |
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232 } |
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233 |
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234 std::auto_ptr<Plugin> plugin(new Plugin(path)); |
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236 if (!IsOrthancPlugin(plugin->GetLibrary())) |
887 | 237 { |
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238 LOG(ERROR) << "Plugin " << plugin->GetLibrary().GetPath() |
887 | 239 << " does not declare the proper entry functions"; |
240 throw OrthancException(ErrorCode_SharedLibrary); | |
241 } | |
242 | |
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243 std::string name(CallGetName(plugin->GetLibrary())); |
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244 if (plugins_.find(name) != plugins_.end()) |
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245 { |
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246 LOG(ERROR) << "Plugin '" << name << "' already registered"; |
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247 throw OrthancException(ErrorCode_SharedLibrary); |
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248 } |
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249 |
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250 plugin->SetVersion(CallGetVersion(plugin->GetLibrary())); |
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251 LOG(WARNING) << "Registering plugin '" << name |
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252 << "' (version " << plugin->GetVersion() << ")"; |
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254 CallInitialize(plugin->GetLibrary(), context_); |
887 | 255 |
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256 plugins_[name] = plugin.release(); |
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257 } |
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258 |
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259 |
889 | 260 void PluginsManager::ScanFolderForPlugins(const std::string& folder, |
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261 bool isRecursive) |
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262 { |
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263 using namespace boost::filesystem; |
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264 |
889 | 265 if (!exists(folder)) |
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266 { |
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267 return; |
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268 } |
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269 |
889 | 270 LOG(INFO) << "Scanning folder " << folder << " for plugins"; |
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271 |
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272 directory_iterator end_it; // default construction yields past-the-end |
889 | 273 for (directory_iterator it(folder); |
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274 it != end_it; |
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275 ++it) |
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276 { |
889 | 277 std::string path = it->path().string(); |
278 | |
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279 if (is_directory(it->status())) |
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280 { |
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281 if (isRecursive) |
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282 { |
889 | 283 ScanFolderForPlugins(path, true); |
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284 } |
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285 } |
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286 else |
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287 { |
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288 std::string extension = boost::filesystem::extension(it->path()); |
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289 Toolbox::ToLowerCase(extension); |
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290 |
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291 if (extension == PLUGIN_EXTENSION) |
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292 { |
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293 LOG(INFO) << "Found a shared library: " << it->path(); |
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294 |
1297 | 295 SharedLibrary plugin(path); |
296 if (IsOrthancPlugin(plugin)) | |
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297 { |
1297 | 298 RegisterPlugin(path); |
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299 } |
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300 } |
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301 } |
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302 } |
887 | 303 } |
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304 |
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305 |
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306 void PluginsManager::ListPlugins(std::list<std::string>& result) const |
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307 { |
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308 result.clear(); |
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309 |
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310 for (Plugins::const_iterator it = plugins_.begin(); |
1304 | 311 it != plugins_.end(); ++it) |
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312 { |
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313 result.push_back(it->first); |
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314 } |
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315 } |
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316 |
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317 |
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318 bool PluginsManager::HasPlugin(const std::string& name) const |
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319 { |
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320 return plugins_.find(name) != plugins_.end(); |
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321 } |
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322 |
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323 |
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324 const std::string& PluginsManager::GetPluginVersion(const std::string& name) const |
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325 { |
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326 Plugins::const_iterator it = plugins_.find(name); |
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327 if (it == plugins_.end()) |
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328 { |
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329 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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330 } |
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331 else |
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332 { |
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333 return it->second->GetVersion(); |
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334 } |
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335 } |
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336 |
887 | 337 } |