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annotate Plugins/Engine/PluginsManager.cpp @ 1074:3f3671f7bfe3

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dicom conformance with uids
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 29 Jul 2014 10:27:15 +0200
parents 57400f233de8
children 1e1390665639
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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) || defined(__FreeBSD_kernel__)
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46 #define PLUGIN_EXTENSION ".so"
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47 #elif defined(__APPLE__) && defined(__MACH__)
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48 #define PLUGIN_EXTENSION ".dylib"
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49 #else
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50 #error Support your platform here
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51 #endif
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52
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53
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54 namespace Orthanc
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55 {
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56 static void CallInitialize(SharedLibrary& plugin,
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57 const OrthancPluginContext& context)
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58 {
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59 typedef int32_t (*Initialize) (const OrthancPluginContext*);
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60
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61 #if defined(_WIN32)
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62 Initialize initialize = (Initialize) plugin.GetFunction("OrthancPluginInitialize");
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63 #else
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64 /**
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65 * gcc would complain about "ISO C++ forbids casting between
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66 * pointer-to-function and pointer-to-object" without the trick
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67 * below, that is known as "the POSIX.1-2003 (Technical Corrigendum
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68 * 1) workaround". See the man page of "dlsym()".
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69 * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
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70 * http://stackoverflow.com/a/14543811/881731
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71 **/
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72
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73 Initialize initialize;
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74 *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize");
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75 #endif
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76
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77 assert(initialize != NULL);
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78 int32_t error = initialize(&context);
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79
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80 if (error != 0)
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81 {
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82 LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath()
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83 << " (code " << error << ")";
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84 throw OrthancException(ErrorCode_SharedLibrary);
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85 }
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86 }
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87
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88
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89 static void CallFinalize(SharedLibrary& plugin)
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90 {
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91 typedef void (*Finalize) ();
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92
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93 #if defined(_WIN32)
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94 Finalize finalize = (Finalize) plugin.GetFunction("OrthancPluginFinalize");
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95 #else
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96 Finalize finalize;
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97 *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize");
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98 #endif
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99
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100 assert(finalize != NULL);
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101 finalize();
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102 }
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103
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104
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105 static const char* CallGetName(SharedLibrary& plugin)
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106 {
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107 typedef const char* (*GetName) ();
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108
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109 #if defined(_WIN32)
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110 GetName getName = (GetName) plugin.GetFunction("OrthancPluginGetName");
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111 #else
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112 GetName getName;
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113 *(void **) (&getName) = plugin.GetFunction("OrthancPluginGetName");
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114 #endif
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115
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116 assert(getName != NULL);
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117 return getName();
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118 }
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119
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120
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121 static const char* CallGetVersion(SharedLibrary& plugin)
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122 {
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123 typedef const char* (*GetVersion) ();
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124
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125 #if defined(_WIN32)
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126 GetVersion getVersion = (GetVersion) plugin.GetFunction("OrthancPluginGetVersion");
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127 #else
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128 GetVersion getVersion;
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129 *(void **) (&getVersion) = plugin.GetFunction("OrthancPluginGetVersion");
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130 #endif
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131
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132 assert(getVersion != NULL);
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133 return getVersion();
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134 }
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135
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136
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137 int32_t PluginsManager::InvokeService(OrthancPluginContext* context,
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138 _OrthancPluginService service,
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139 const void* params)
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140 {
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141 switch (service)
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142 {
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143 case _OrthancPluginService_LogError:
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144 LOG(ERROR) << reinterpret_cast<const char*>(params);
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145 return 0;
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146
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147 case _OrthancPluginService_LogWarning:
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148 LOG(WARNING) << reinterpret_cast<const char*>(params);
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149 return 0;
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150
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151 case _OrthancPluginService_LogInfo:
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152 LOG(INFO) << reinterpret_cast<const char*>(params);
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153 return 0;
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154
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155 default:
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156 break;
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157 }
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158
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159 PluginsManager* that = reinterpret_cast<PluginsManager*>(context->pluginsManager);
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160 bool error = false;
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161
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162 for (std::list<IPluginServiceProvider*>::iterator
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163 it = that->serviceProviders_.begin();
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164 it != that->serviceProviders_.end(); ++it)
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165 {
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166 try
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167 {
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168 if ((*it)->InvokeService(service, params))
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169 {
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170 return 0;
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171 }
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172 }
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173 catch (OrthancException&)
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174 {
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175 // This service provider has failed, go to the next
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176 error = true;
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177 }
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178 }
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179
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180 if (error)
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181 {
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182 LOG(ERROR) << "Exception when dealing with service " << service;
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183 }
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184 else
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185 {
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186 LOG(ERROR) << "Plugin invoking unknown service " << service;
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187 }
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188
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189 return -1;
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190 }
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191
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192
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193 PluginsManager::PluginsManager()
887
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194 {
894
690aeb4cb899 REST callbacks
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195 memset(&context_, 0, sizeof(context_));
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196 context_.pluginsManager = this;
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197 context_.orthancVersion = ORTHANC_VERSION;
904
2732b5f57d9c sample to forward dicom data
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198 context_.Free = ::free;
898
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199 context_.InvokeService = InvokeService;
887
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200 }
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201
4066e6f2d134 PluginsManager
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202 PluginsManager::~PluginsManager()
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203 {
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204 for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); ++it)
887
4066e6f2d134 PluginsManager
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205 {
888
d44b845c1c89 recursive scan for plugins
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206 if (it->second != NULL)
887
4066e6f2d134 PluginsManager
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207 {
893
f57802f8b4dc plugins for windows
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208 LOG(WARNING) << "Unregistering plugin '" << CallGetName(*it->second)
f57802f8b4dc plugins for windows
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209 << "' (version " << CallGetVersion(*it->second) << ")";
f57802f8b4dc plugins for windows
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210
888
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diff changeset
211 CallFinalize(*(it->second));
d44b845c1c89 recursive scan for plugins
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diff changeset
212 delete it->second;
887
4066e6f2d134 PluginsManager
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parents:
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213 }
4066e6f2d134 PluginsManager
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parents:
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214 }
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parents:
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215 }
4066e6f2d134 PluginsManager
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216
888
d44b845c1c89 recursive scan for plugins
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217
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diff changeset
218 static bool IsOrthancPlugin(SharedLibrary& library)
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219 {
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diff changeset
220 return (library.HasFunction("OrthancPluginInitialize") &&
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diff changeset
221 library.HasFunction("OrthancPluginFinalize") &&
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diff changeset
222 library.HasFunction("OrthancPluginGetName") &&
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Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
223 library.HasFunction("OrthancPluginGetVersion"));
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224 }
d44b845c1c89 recursive scan for plugins
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diff changeset
225
887
4066e6f2d134 PluginsManager
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226
4066e6f2d134 PluginsManager
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227 void PluginsManager::RegisterPlugin(const std::string& path)
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228 {
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diff changeset
229 std::auto_ptr<SharedLibrary> plugin(new SharedLibrary(path));
4066e6f2d134 PluginsManager
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diff changeset
230
888
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diff changeset
231 if (!IsOrthancPlugin(*plugin))
887
4066e6f2d134 PluginsManager
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parents:
diff changeset
232 {
4066e6f2d134 PluginsManager
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diff changeset
233 LOG(ERROR) << "Plugin " << plugin->GetPath()
4066e6f2d134 PluginsManager
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parents:
diff changeset
234 << " does not declare the proper entry functions";
4066e6f2d134 PluginsManager
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parents:
diff changeset
235 throw OrthancException(ErrorCode_SharedLibrary);
4066e6f2d134 PluginsManager
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parents:
diff changeset
236 }
4066e6f2d134 PluginsManager
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diff changeset
237
888
d44b845c1c89 recursive scan for plugins
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diff changeset
238 std::string name(CallGetName(*plugin));
d44b845c1c89 recursive scan for plugins
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diff changeset
239 if (plugins_.find(name) != plugins_.end())
d44b845c1c89 recursive scan for plugins
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diff changeset
240 {
d44b845c1c89 recursive scan for plugins
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diff changeset
241 LOG(ERROR) << "Plugin '" << name << "' already registered";
d44b845c1c89 recursive scan for plugins
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diff changeset
242 throw OrthancException(ErrorCode_SharedLibrary);
d44b845c1c89 recursive scan for plugins
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diff changeset
243 }
d44b845c1c89 recursive scan for plugins
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diff changeset
244
d44b845c1c89 recursive scan for plugins
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diff changeset
245 LOG(WARNING) << "Registering plugin '" << name
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
246 << "' (version " << CallGetVersion(*plugin) << ")";
887
4066e6f2d134 PluginsManager
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247
4066e6f2d134 PluginsManager
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248 CallInitialize(*plugin, context_);
4066e6f2d134 PluginsManager
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249
888
d44b845c1c89 recursive scan for plugins
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250 plugins_[name] = plugin.release();
d44b845c1c89 recursive scan for plugins
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diff changeset
251 }
d44b845c1c89 recursive scan for plugins
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diff changeset
252
d44b845c1c89 recursive scan for plugins
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diff changeset
253
889
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diff changeset
254 void PluginsManager::ScanFolderForPlugins(const std::string& folder,
888
d44b845c1c89 recursive scan for plugins
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diff changeset
255 bool isRecursive)
d44b845c1c89 recursive scan for plugins
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diff changeset
256 {
d44b845c1c89 recursive scan for plugins
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diff changeset
257 using namespace boost::filesystem;
d44b845c1c89 recursive scan for plugins
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diff changeset
258
889
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
259 if (!exists(folder))
888
d44b845c1c89 recursive scan for plugins
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diff changeset
260 {
d44b845c1c89 recursive scan for plugins
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diff changeset
261 return;
d44b845c1c89 recursive scan for plugins
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diff changeset
262 }
d44b845c1c89 recursive scan for plugins
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parents: 887
diff changeset
263
889
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diff changeset
264 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
265
d44b845c1c89 recursive scan for plugins
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diff changeset
266 directory_iterator end_it; // default construction yields past-the-end
889
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diff changeset
267 for (directory_iterator it(folder);
888
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diff changeset
268 it != end_it;
d44b845c1c89 recursive scan for plugins
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diff changeset
269 ++it)
d44b845c1c89 recursive scan for plugins
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diff changeset
270 {
889
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diff changeset
271 std::string path = it->path().string();
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diff changeset
272
888
d44b845c1c89 recursive scan for plugins
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diff changeset
273 if (is_directory(it->status()))
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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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 if (isRecursive)
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
276 {
889
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diff changeset
277 ScanFolderForPlugins(path, true);
888
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 else
d44b845c1c89 recursive scan for plugins
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diff changeset
281 {
d44b845c1c89 recursive scan for plugins
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diff changeset
282 if (boost::filesystem::extension(it->path()) == PLUGIN_EXTENSION)
d44b845c1c89 recursive scan for plugins
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diff changeset
283 {
d44b845c1c89 recursive scan for plugins
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diff changeset
284 LOG(INFO) << "Found a shared library: " << it->path();
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
285
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
286 try
d44b845c1c89 recursive scan for plugins
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parents: 887
diff changeset
287 {
889
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 888
diff changeset
288 SharedLibrary plugin(path);
888
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289 if (IsOrthancPlugin(plugin))
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290 {
889
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291 RegisterPlugin(path);
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292 }
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293 }
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294 catch (OrthancException&)
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295 {
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296 }
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297 }
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298 }
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299 }
887
4066e6f2d134 PluginsManager
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300 }
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301 }