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annotate Plugins/Engine/PluginsManager.cpp @ 893:f57802f8b4dc plugins

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plugins for windows
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 16 Jun 2014 16:14:56 +0200
parents d2a393061eb6
children 690aeb4cb899
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
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4 * Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "PluginsManager.h"
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34
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35 #include <glog/logging.h>
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36 #include <cassert>
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37 #include <memory>
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38 #include <boost/filesystem.hpp>
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39
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40 #ifdef WIN32
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41 #define PLUGIN_EXTENSION ".dll"
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42 #elif defined(__linux)
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43 #define PLUGIN_EXTENSION ".so"
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44 #else
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45 #error Support your platform here
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46 #endif
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47
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48
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49 namespace Orthanc
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50 {
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51 static void CallInitialize(SharedLibrary& plugin,
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52 const OrthancPluginContext& context)
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53 {
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54 typedef int32_t (*Initialize) (const OrthancPluginContext*);
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55
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56 #if defined(_WIN32)
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57 Initialize initialize = (Initialize) plugin.GetFunction("OrthancPluginInitialize");
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58 #else
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59 /**
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60 * gcc would complain about "ISO C++ forbids casting between
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61 * pointer-to-function and pointer-to-object" without the trick
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62 * below, that is known as "the POSIX.1-2003 (Technical Corrigendum
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63 * 1) workaround". See the man page of "dlsym()".
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64 * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
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65 * http://stackoverflow.com/a/14543811/881731
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66 **/
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67
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68 Initialize initialize;
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69 *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize");
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70 #endif
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71
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72 assert(initialize != NULL);
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73 int32_t error = initialize(&context);
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74
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75 if (error != 0)
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76 {
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77 LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath()
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78 << " (code " << error << ")";
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79 throw OrthancException(ErrorCode_SharedLibrary);
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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 static void CallFinalize(SharedLibrary& plugin)
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85 {
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86 typedef void (*Finalize) ();
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87
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88 #if defined(_WIN32)
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89 Finalize finalize = (Finalize) plugin.GetFunction("OrthancPluginFinalize");
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90 #else
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91 Finalize finalize;
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92 *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize");
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93 #endif
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94
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95 assert(finalize != NULL);
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96 finalize();
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97 }
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98
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99
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100 static const char* CallGetName(SharedLibrary& plugin)
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101 {
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102 typedef const char* (*GetName) ();
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103
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104 #if defined(_WIN32)
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105 GetName getName = (GetName) plugin.GetFunction("OrthancPluginGetName");
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106 #else
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107 GetName getName;
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108 *(void **) (&getName) = plugin.GetFunction("OrthancPluginGetName");
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109 #endif
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110
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111 assert(getName != NULL);
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112 return getName();
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113 }
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114
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115
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116 static const char* CallGetVersion(SharedLibrary& plugin)
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117 {
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118 typedef const char* (*GetVersion) ();
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119
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120 #if defined(_WIN32)
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121 GetVersion getVersion = (GetVersion) plugin.GetFunction("OrthancPluginGetVersion");
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122 #else
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123 GetVersion getVersion;
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124 *(void **) (&getVersion) = plugin.GetFunction("OrthancPluginGetVersion");
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125 #endif
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126
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127 assert(getVersion != NULL);
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128 return getVersion();
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129 }
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130
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131
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132 static void LogError(const char* str)
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133 {
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134 LOG(ERROR) << str;
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135 }
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136
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137 static void LogWarning(const char* str)
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138 {
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139 LOG(WARNING) << str;
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140 }
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141
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142 static void LogInfo(const char* str)
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143 {
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144 LOG(INFO) << str;
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145 }
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146
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147 static int32_t InvokeService(const char* serviceName,
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148 const void* serviceParameters)
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149 {
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150 // TODO
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151 return 0;
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152 }
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153
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154 PluginsManager::PluginsManager()
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155 {
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156 context_.orthancVersion = ORTHANC_VERSION;
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157 context_.InvokeService = InvokeService;
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158 context_.LogError = LogError;
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159 context_.LogWarning = LogWarning;
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160 context_.LogInfo = LogInfo;
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161 }
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162
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163 PluginsManager::~PluginsManager()
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164 {
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165 for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); it++)
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166 {
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167 if (it->second != NULL)
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168 {
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169 LOG(WARNING) << "Unregistering plugin '" << CallGetName(*it->second)
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170 << "' (version " << CallGetVersion(*it->second) << ")";
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171
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172 CallFinalize(*(it->second));
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173 delete it->second;
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174 }
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175 }
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176 }
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177
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178
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179 static bool IsOrthancPlugin(SharedLibrary& library)
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180 {
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181 return (library.HasFunction("OrthancPluginInitialize") &&
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182 library.HasFunction("OrthancPluginFinalize") &&
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183 library.HasFunction("OrthancPluginGetName") &&
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184 library.HasFunction("OrthancPluginGetVersion"));
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185 }
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186
887
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187
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188 void PluginsManager::RegisterPlugin(const std::string& path)
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189 {
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190 std::auto_ptr<SharedLibrary> plugin(new SharedLibrary(path));
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191
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192 if (!IsOrthancPlugin(*plugin))
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193 {
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194 LOG(ERROR) << "Plugin " << plugin->GetPath()
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195 << " does not declare the proper entry functions";
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196 throw OrthancException(ErrorCode_SharedLibrary);
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197 }
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198
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199 std::string name(CallGetName(*plugin));
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200 if (plugins_.find(name) != plugins_.end())
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201 {
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202 LOG(ERROR) << "Plugin '" << name << "' already registered";
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203 throw OrthancException(ErrorCode_SharedLibrary);
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204 }
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205
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206 LOG(WARNING) << "Registering plugin '" << name
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207 << "' (version " << CallGetVersion(*plugin) << ")";
887
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208
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209 CallInitialize(*plugin, context_);
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210
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211 plugins_[name] = plugin.release();
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212 }
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213
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214
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215 void PluginsManager::ScanFolderForPlugins(const std::string& folder,
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216 bool isRecursive)
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217 {
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218 using namespace boost::filesystem;
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219
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220 if (!exists(folder))
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221 {
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222 return;
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223 }
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224
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225 LOG(INFO) << "Scanning folder " << folder << " for plugins";
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226
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227 directory_iterator end_it; // default construction yields past-the-end
889
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228 for (directory_iterator it(folder);
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229 it != end_it;
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230 ++it)
d44b845c1c89 recursive scan for plugins
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231 {
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232 std::string path = it->path().string();
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233
888
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diff changeset
234 if (is_directory(it->status()))
d44b845c1c89 recursive scan for plugins
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235 {
d44b845c1c89 recursive scan for plugins
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diff changeset
236 if (isRecursive)
d44b845c1c89 recursive scan for plugins
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diff changeset
237 {
889
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diff changeset
238 ScanFolderForPlugins(path, true);
888
d44b845c1c89 recursive scan for plugins
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239 }
d44b845c1c89 recursive scan for plugins
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240 }
d44b845c1c89 recursive scan for plugins
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diff changeset
241 else
d44b845c1c89 recursive scan for plugins
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diff changeset
242 {
d44b845c1c89 recursive scan for plugins
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diff changeset
243 if (boost::filesystem::extension(it->path()) == PLUGIN_EXTENSION)
d44b845c1c89 recursive scan for plugins
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diff changeset
244 {
d44b845c1c89 recursive scan for plugins
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245 LOG(INFO) << "Found a shared library: " << it->path();
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
246
d44b845c1c89 recursive scan for plugins
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diff changeset
247 try
d44b845c1c89 recursive scan for plugins
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diff changeset
248 {
889
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diff changeset
249 SharedLibrary plugin(path);
888
d44b845c1c89 recursive scan for plugins
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diff changeset
250 if (IsOrthancPlugin(plugin))
d44b845c1c89 recursive scan for plugins
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parents: 887
diff changeset
251 {
889
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
252 RegisterPlugin(path);
888
d44b845c1c89 recursive scan for plugins
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253 }
d44b845c1c89 recursive scan for plugins
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254 }
d44b845c1c89 recursive scan for plugins
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diff changeset
255 catch (OrthancException&)
d44b845c1c89 recursive scan for plugins
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256 {
d44b845c1c89 recursive scan for plugins
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257 }
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258 }
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diff changeset
259 }
d44b845c1c89 recursive scan for plugins
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diff changeset
260 }
887
4066e6f2d134 PluginsManager
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261 }
4066e6f2d134 PluginsManager
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parents:
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262
4066e6f2d134 PluginsManager
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263 }