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annotate Plugins/Engine/PluginsManager.cpp @ 897:bafc9d592632 plugins

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REST callbacks are working
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 17 Jun 2014 17:43:39 +0200
parents c4053ac5db04
children 7000fc86fe62
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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 "../../Core/Toolbox.h"
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36 #include "../../Core/HttpServer/HttpOutput.h"
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37
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38 #include <glog/logging.h>
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39 #include <cassert>
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40 #include <memory>
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41 #include <boost/filesystem.hpp>
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42
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43 #ifdef WIN32
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44 #define PLUGIN_EXTENSION ".dll"
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45 #elif defined(__linux)
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46 #define PLUGIN_EXTENSION ".so"
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47 #else
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48 #error Support your platform here
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49 #endif
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50
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51
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52 namespace Orthanc
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53 {
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54 static void CallInitialize(SharedLibrary& plugin,
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55 const OrthancPluginContext& context)
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56 {
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57 typedef int32_t (*Initialize) (const OrthancPluginContext*);
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58
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59 #if defined(_WIN32)
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60 Initialize initialize = (Initialize) plugin.GetFunction("OrthancPluginInitialize");
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61 #else
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62 /**
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63 * gcc would complain about "ISO C++ forbids casting between
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64 * pointer-to-function and pointer-to-object" without the trick
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65 * below, that is known as "the POSIX.1-2003 (Technical Corrigendum
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66 * 1) workaround". See the man page of "dlsym()".
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67 * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
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68 * http://stackoverflow.com/a/14543811/881731
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69 **/
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70
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71 Initialize initialize;
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72 *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize");
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73 #endif
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74
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75 assert(initialize != NULL);
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76 int32_t error = initialize(&context);
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77
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78 if (error != 0)
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79 {
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80 LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath()
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81 << " (code " << error << ")";
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82 throw OrthancException(ErrorCode_SharedLibrary);
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83 }
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84 }
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85
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86
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87 static void CallFinalize(SharedLibrary& plugin)
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88 {
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89 typedef void (*Finalize) ();
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90
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91 #if defined(_WIN32)
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92 Finalize finalize = (Finalize) plugin.GetFunction("OrthancPluginFinalize");
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93 #else
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94 Finalize finalize;
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95 *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize");
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96 #endif
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97
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98 assert(finalize != NULL);
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99 finalize();
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100 }
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101
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102
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103 static const char* CallGetName(SharedLibrary& plugin)
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104 {
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105 typedef const char* (*GetName) ();
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106
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107 #if defined(_WIN32)
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108 GetName getName = (GetName) plugin.GetFunction("OrthancPluginGetName");
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109 #else
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110 GetName getName;
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111 *(void **) (&getName) = plugin.GetFunction("OrthancPluginGetName");
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112 #endif
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113
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114 assert(getName != NULL);
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115 return getName();
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116 }
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117
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118
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119 static const char* CallGetVersion(SharedLibrary& plugin)
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120 {
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121 typedef const char* (*GetVersion) ();
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122
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123 #if defined(_WIN32)
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124 GetVersion getVersion = (GetVersion) plugin.GetFunction("OrthancPluginGetVersion");
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125 #else
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126 GetVersion getVersion;
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127 *(void **) (&getVersion) = plugin.GetFunction("OrthancPluginGetVersion");
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128 #endif
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129
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130 assert(getVersion != NULL);
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131 return getVersion();
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132 }
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133
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134
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135 static void LogError(const char* str)
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136 {
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137 LOG(ERROR) << str;
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138 }
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139
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140 static void LogWarning(const char* str)
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141 {
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142 LOG(WARNING) << str;
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143 }
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144
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145 static void LogInfo(const char* str)
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146 {
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147 LOG(INFO) << str;
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148 }
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149
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150 void PluginsManager::RegisterRestCallback(const OrthancPluginContext* context,
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151 const char* pathRegularExpression,
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152 OrthancPluginRestCallback callback)
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153 {
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154 LOG(INFO) << "Plugin has registered a REST callback on: " << pathRegularExpression;
894
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155 PluginsManager* manager = reinterpret_cast<PluginsManager*>(context->pimpl);
897
bafc9d592632 REST callbacks are working
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156 manager->restCallbacks_.push_back(std::make_pair(pathRegularExpression, callback));
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157 }
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158
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159
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160 static void AnswerBuffer(OrthancPluginRestOutput* output,
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161 const char* answer,
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162 uint32_t answerSize,
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163 const char* mimeType)
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164 {
897
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165 HttpOutput* translatedOutput = reinterpret_cast<HttpOutput*>(output);
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166 translatedOutput->AnswerBufferWithContentType(answer, answerSize, mimeType);
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167 }
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168
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169
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170 PluginsManager::PluginsManager()
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171 {
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172 memset(&context_, 0, sizeof(context_));
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173 context_.pimpl = this;
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174 context_.orthancVersion = ORTHANC_VERSION;
894
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175 context_.FreeBuffer = ::free;
887
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176 context_.LogError = LogError;
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177 context_.LogWarning = LogWarning;
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178 context_.LogInfo = LogInfo;
894
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179 context_.RegisterRestCallback = RegisterRestCallback;
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180 context_.AnswerBuffer = AnswerBuffer;
887
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181 }
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182
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183 PluginsManager::~PluginsManager()
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184 {
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185 for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); it++)
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186 {
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187 if (it->second != NULL)
887
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188 {
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f57802f8b4dc plugins for windows
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189 LOG(WARNING) << "Unregistering plugin '" << CallGetName(*it->second)
f57802f8b4dc plugins for windows
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190 << "' (version " << CallGetVersion(*it->second) << ")";
f57802f8b4dc plugins for windows
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191
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192 CallFinalize(*(it->second));
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193 delete it->second;
887
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194 }
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195 }
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196 }
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197
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198
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199 static bool IsOrthancPlugin(SharedLibrary& library)
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200 {
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201 return (library.HasFunction("OrthancPluginInitialize") &&
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202 library.HasFunction("OrthancPluginFinalize") &&
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203 library.HasFunction("OrthancPluginGetName") &&
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Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
204 library.HasFunction("OrthancPluginGetVersion"));
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205 }
d44b845c1c89 recursive scan for plugins
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206
887
4066e6f2d134 PluginsManager
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207
4066e6f2d134 PluginsManager
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208 void PluginsManager::RegisterPlugin(const std::string& path)
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209 {
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210 std::auto_ptr<SharedLibrary> plugin(new SharedLibrary(path));
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211
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212 if (!IsOrthancPlugin(*plugin))
887
4066e6f2d134 PluginsManager
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213 {
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214 LOG(ERROR) << "Plugin " << plugin->GetPath()
4066e6f2d134 PluginsManager
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215 << " does not declare the proper entry functions";
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216 throw OrthancException(ErrorCode_SharedLibrary);
4066e6f2d134 PluginsManager
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217 }
4066e6f2d134 PluginsManager
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218
888
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219 std::string name(CallGetName(*plugin));
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diff changeset
220 if (plugins_.find(name) != plugins_.end())
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221 {
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222 LOG(ERROR) << "Plugin '" << name << "' already registered";
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223 throw OrthancException(ErrorCode_SharedLibrary);
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diff changeset
224 }
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diff changeset
225
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226 LOG(WARNING) << "Registering plugin '" << name
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diff changeset
227 << "' (version " << CallGetVersion(*plugin) << ")";
887
4066e6f2d134 PluginsManager
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diff changeset
228
4066e6f2d134 PluginsManager
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diff changeset
229 CallInitialize(*plugin, context_);
4066e6f2d134 PluginsManager
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diff changeset
230
888
d44b845c1c89 recursive scan for plugins
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diff changeset
231 plugins_[name] = plugin.release();
d44b845c1c89 recursive scan for plugins
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diff changeset
232 }
d44b845c1c89 recursive scan for plugins
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diff changeset
233
d44b845c1c89 recursive scan for plugins
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diff changeset
234
889
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
235 void PluginsManager::ScanFolderForPlugins(const std::string& folder,
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
236 bool isRecursive)
d44b845c1c89 recursive scan for plugins
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diff changeset
237 {
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
238 using namespace boost::filesystem;
d44b845c1c89 recursive scan for plugins
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diff changeset
239
889
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
240 if (!exists(folder))
888
d44b845c1c89 recursive scan for plugins
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diff changeset
241 {
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
242 return;
d44b845c1c89 recursive scan for plugins
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diff changeset
243 }
d44b845c1c89 recursive scan for plugins
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diff changeset
244
889
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
245 LOG(INFO) << "Scanning folder " << folder << " for plugins";
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
246
d44b845c1c89 recursive scan for plugins
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diff changeset
247 directory_iterator end_it; // default construction yields past-the-end
889
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 888
diff changeset
248 for (directory_iterator it(folder);
888
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Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
249 it != end_it;
d44b845c1c89 recursive scan for plugins
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diff changeset
250 ++it)
d44b845c1c89 recursive scan for plugins
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diff changeset
251 {
889
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diff changeset
252 std::string path = it->path().string();
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
253
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
254 if (is_directory(it->status()))
d44b845c1c89 recursive scan for plugins
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diff changeset
255 {
d44b845c1c89 recursive scan for plugins
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diff changeset
256 if (isRecursive)
d44b845c1c89 recursive scan for plugins
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diff changeset
257 {
889
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 888
diff changeset
258 ScanFolderForPlugins(path, true);
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
259 }
d44b845c1c89 recursive scan for plugins
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diff changeset
260 }
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
261 else
d44b845c1c89 recursive scan for plugins
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diff changeset
262 {
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
263 if (boost::filesystem::extension(it->path()) == PLUGIN_EXTENSION)
d44b845c1c89 recursive scan for plugins
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diff changeset
264 {
d44b845c1c89 recursive scan for plugins
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diff changeset
265 LOG(INFO) << "Found a shared library: " << it->path();
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
266
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
267 try
d44b845c1c89 recursive scan for plugins
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diff changeset
268 {
889
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 888
diff changeset
269 SharedLibrary plugin(path);
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
270 if (IsOrthancPlugin(plugin))
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
271 {
889
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
272 RegisterPlugin(path);
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
273 }
d44b845c1c89 recursive scan for plugins
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diff changeset
274 }
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
275 catch (OrthancException&)
d44b845c1c89 recursive scan for plugins
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diff changeset
276 {
d44b845c1c89 recursive scan for plugins
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diff changeset
277 }
d44b845c1c89 recursive scan for plugins
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diff changeset
278 }
d44b845c1c89 recursive scan for plugins
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diff changeset
279 }
d44b845c1c89 recursive scan for plugins
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diff changeset
280 }
887
4066e6f2d134 PluginsManager
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
281 }
4066e6f2d134 PluginsManager
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parents:
diff changeset
282 }