Mercurial > hg > orthanc

annotate OrthancServer/Plugins/Engine/PluginsManager.cpp @ 4045:05b8fd21089c framework

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 10 Jun 2020 21:27:31 +0200
parents d25f4c0fa160
children 1bd14c900699
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../../Sources/PrecompiledHeadersServer.h"
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35 #include "PluginsManager.h"
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36
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37 #if ORTHANC_ENABLE_PLUGINS != 1
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38 #error The plugin support is disabled
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39 #endif
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40
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41 #include "../../../OrthancFramework/Sources/HttpServer/HttpOutput.h"
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42 #include "../../../OrthancFramework/Sources/Logging.h"
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43 #include "../../../OrthancFramework/Sources/OrthancException.h"
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44 #include "../../../OrthancFramework/Sources/Toolbox.h"
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45
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46 #include <cassert>
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47 #include <memory>
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48 #include <boost/filesystem.hpp>
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49
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50 #ifdef WIN32
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51 #define PLUGIN_EXTENSION ".dll"
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52 #elif defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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53 #define PLUGIN_EXTENSION ".so"
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54 #elif defined(__APPLE__) && defined(__MACH__)
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55 #define PLUGIN_EXTENSION ".dylib"
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56 #else
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57 #error Support your platform here
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58 #endif
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59
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60
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61 namespace Orthanc
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62 {
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63 PluginsManager::Plugin::Plugin(PluginsManager& pluginManager,
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64 const std::string& path) :
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65 library_(path),
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66 pluginManager_(pluginManager)
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67 {
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68 memset(&context_, 0, sizeof(context_));
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69 context_.pluginsManager = this;
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70 context_.orthancVersion = ORTHANC_VERSION;
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71 context_.Free = ::free;
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72 context_.InvokeService = InvokeService;
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73 }
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74
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75
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76 static void CallInitialize(SharedLibrary& plugin,
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77 const OrthancPluginContext& context)
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78 {
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79 typedef int32_t (*Initialize) (const OrthancPluginContext*);
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80
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81 #if defined(_WIN32)
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82 Initialize initialize = (Initialize) plugin.GetFunction("OrthancPluginInitialize");
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83 #else
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84 /**
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85 * gcc would complain about "ISO C++ forbids casting between
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86 * pointer-to-function and pointer-to-object" without the trick
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87 * below, that is known as "the POSIX.1-2003 (Technical Corrigendum
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88 * 1) workaround". See the man page of "dlsym()".
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89 * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
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90 * http://stackoverflow.com/a/14543811/881731
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91 **/
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92
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93 Initialize initialize;
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94 *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize");
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95 #endif
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96
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97 assert(initialize != NULL);
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98 int32_t error = initialize(&context);
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99
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100 if (error != 0)
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101 {
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102 LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath()
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103 << " (code " << error << ")";
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104 throw OrthancException(ErrorCode_SharedLibrary);
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105 }
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106 }
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107
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108
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109 static void CallFinalize(SharedLibrary& plugin)
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110 {
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111 typedef void (*Finalize) ();
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112
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113 #if defined(_WIN32)
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114 Finalize finalize = (Finalize) plugin.GetFunction("OrthancPluginFinalize");
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115 #else
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116 Finalize finalize;
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117 *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize");
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118 #endif
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119
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120 assert(finalize != NULL);
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121 finalize();
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122 }
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123
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124
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125 static const char* CallGetName(SharedLibrary& plugin)
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126 {
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127 typedef const char* (*GetName) ();
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128
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129 #if defined(_WIN32)
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130 GetName getName = (GetName) plugin.GetFunction("OrthancPluginGetName");
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131 #else
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132 GetName getName;
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133 *(void **) (&getName) = plugin.GetFunction("OrthancPluginGetName");
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134 #endif
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135
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136 assert(getName != NULL);
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137 return getName();
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138 }
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139
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140
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141 static const char* CallGetVersion(SharedLibrary& plugin)
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142 {
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143 typedef const char* (*GetVersion) ();
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144
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145 #if defined(_WIN32)
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146 GetVersion getVersion = (GetVersion) plugin.GetFunction("OrthancPluginGetVersion");
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147 #else
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148 GetVersion getVersion;
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149 *(void **) (&getVersion) = plugin.GetFunction("OrthancPluginGetVersion");
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150 #endif
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151
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152 assert(getVersion != NULL);
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153 return getVersion();
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154 }
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155
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156
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157 OrthancPluginErrorCode PluginsManager::InvokeService(OrthancPluginContext* context,
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158 _OrthancPluginService service,
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159 const void* params)
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160 {
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161 switch (service)
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162 {
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163 case _OrthancPluginService_LogError:
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164 LOG(ERROR) << reinterpret_cast<const char*>(params);
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165 return OrthancPluginErrorCode_Success;
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166
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167 case _OrthancPluginService_LogWarning:
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168 LOG(WARNING) << reinterpret_cast<const char*>(params);
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169 return OrthancPluginErrorCode_Success;
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170
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171 case _OrthancPluginService_LogInfo:
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172 LOG(INFO) << reinterpret_cast<const char*>(params);
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173 return OrthancPluginErrorCode_Success;
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174
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175 default:
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176 break;
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177 }
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178
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179 Plugin* that = reinterpret_cast<Plugin*>(context->pluginsManager);
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180
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181 for (std::list<IPluginServiceProvider*>::iterator
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182 it = that->GetPluginManager().serviceProviders_.begin();
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183 it != that->GetPluginManager().serviceProviders_.end(); ++it)
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184 {
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185 try
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186 {
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187 if ((*it)->InvokeService(that->GetSharedLibrary(), service, params))
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188 {
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189 return OrthancPluginErrorCode_Success;
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190 }
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191 }
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192 catch (OrthancException& e)
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193 {
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194 // This service provider has failed
1983
0af087300b26 disable error log
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diff changeset
195 if (e.GetErrorCode() != ErrorCode_UnknownResource) // This error code is valid in plugins
0af087300b26 disable error log
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196 {
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197 LOG(ERROR) << "Exception while invoking plugin service " << service << ": " << e.What();
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198 }
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199
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200 return static_cast<OrthancPluginErrorCode>(e.GetErrorCode());
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201 }
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202 }
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203
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204 LOG(ERROR) << "Plugin invoking unknown service: " << service;
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205 return OrthancPluginErrorCode_UnknownPluginService;
887
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206 }
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207
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208
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209 PluginsManager::PluginsManager()
887
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210 {
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parents:
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211 }
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212
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213 PluginsManager::~PluginsManager()
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214 {
944
c068671d12a9 fixes thanks to cppcheck
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diff changeset
215 for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); ++it)
887
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216 {
888
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217 if (it->second != NULL)
887
4066e6f2d134 PluginsManager
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218 {
1232
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
219 LOG(WARNING) << "Unregistering plugin '" << it->first
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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220 << "' (version " << it->second->GetVersion() << ")";
893
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221
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diff changeset
222 CallFinalize(it->second->GetSharedLibrary());
888
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diff changeset
223 delete it->second;
887
4066e6f2d134 PluginsManager
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diff changeset
224 }
4066e6f2d134 PluginsManager
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parents:
diff changeset
225 }
4066e6f2d134 PluginsManager
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226 }
4066e6f2d134 PluginsManager
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227
888
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228
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diff changeset
229 static bool IsOrthancPlugin(SharedLibrary& library)
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diff changeset
230 {
d44b845c1c89 recursive scan for plugins
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diff changeset
231 return (library.HasFunction("OrthancPluginInitialize") &&
d44b845c1c89 recursive scan for plugins
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diff changeset
232 library.HasFunction("OrthancPluginFinalize") &&
d44b845c1c89 recursive scan for plugins
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diff changeset
233 library.HasFunction("OrthancPluginGetName") &&
d44b845c1c89 recursive scan for plugins
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parents: 887
diff changeset
234 library.HasFunction("OrthancPluginGetVersion"));
d44b845c1c89 recursive scan for plugins
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diff changeset
235 }
d44b845c1c89 recursive scan for plugins
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diff changeset
236
887
4066e6f2d134 PluginsManager
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237
4066e6f2d134 PluginsManager
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238 void PluginsManager::RegisterPlugin(const std::string& path)
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diff changeset
239 {
1272
7442097b41c9 Scan of folders for plugins
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diff changeset
240 if (!boost::filesystem::exists(path))
7442097b41c9 Scan of folders for plugins
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diff changeset
241 {
7442097b41c9 Scan of folders for plugins
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diff changeset
242 LOG(ERROR) << "Inexistent path to plugins: " << path;
7442097b41c9 Scan of folders for plugins
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diff changeset
243 return;
7442097b41c9 Scan of folders for plugins
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diff changeset
244 }
7442097b41c9 Scan of folders for plugins
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diff changeset
245
7442097b41c9 Scan of folders for plugins
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parents: 1232
diff changeset
246 if (boost::filesystem::is_directory(path))
7442097b41c9 Scan of folders for plugins
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diff changeset
247 {
7442097b41c9 Scan of folders for plugins
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diff changeset
248 ScanFolderForPlugins(path, false);
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diff changeset
249 return;
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250 }
7442097b41c9 Scan of folders for plugins
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diff changeset
251
3712
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parents: 3640
diff changeset
252 std::unique_ptr<Plugin> plugin(new Plugin(*this, path));
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253
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diff changeset
254 if (!IsOrthancPlugin(plugin->GetSharedLibrary()))
887
4066e6f2d134 PluginsManager
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diff changeset
255 {
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diff changeset
256 LOG(ERROR) << "Plugin " << plugin->GetSharedLibrary().GetPath()
887
4066e6f2d134 PluginsManager
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diff changeset
257 << " does not declare the proper entry functions";
4066e6f2d134 PluginsManager
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diff changeset
258 throw OrthancException(ErrorCode_SharedLibrary);
4066e6f2d134 PluginsManager
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diff changeset
259 }
4066e6f2d134 PluginsManager
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diff changeset
260
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diff changeset
261 std::string name(CallGetName(plugin->GetSharedLibrary()));
888
d44b845c1c89 recursive scan for plugins
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diff changeset
262 if (plugins_.find(name) != plugins_.end())
d44b845c1c89 recursive scan for plugins
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parents: 887
diff changeset
263 {
d44b845c1c89 recursive scan for plugins
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diff changeset
264 LOG(ERROR) << "Plugin '" << name << "' already registered";
d44b845c1c89 recursive scan for plugins
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parents: 887
diff changeset
265 throw OrthancException(ErrorCode_SharedLibrary);
d44b845c1c89 recursive scan for plugins
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diff changeset
266 }
d44b845c1c89 recursive scan for plugins
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diff changeset
267
1630
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parents: 1625
diff changeset
268 plugin->SetVersion(CallGetVersion(plugin->GetSharedLibrary()));
888
d44b845c1c89 recursive scan for plugins
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diff changeset
269 LOG(WARNING) << "Registering plugin '" << name
1232
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
270 << "' (version " << plugin->GetVersion() << ")";
887
4066e6f2d134 PluginsManager
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271
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parents: 1625
diff changeset
272 CallInitialize(plugin->GetSharedLibrary(), plugin->GetContext());
887
4066e6f2d134 PluginsManager
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diff changeset
273
888
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diff changeset
274 plugins_[name] = plugin.release();
d44b845c1c89 recursive scan for plugins
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diff changeset
275 }
d44b845c1c89 recursive scan for plugins
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diff changeset
276
d44b845c1c89 recursive scan for plugins
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diff changeset
277
889
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 888
diff changeset
278 void PluginsManager::ScanFolderForPlugins(const std::string& folder,
888
d44b845c1c89 recursive scan for plugins
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279 bool isRecursive)
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280 {
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281 using namespace boost::filesystem;
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282
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283 if (!exists(folder))
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284 {
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285 return;
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286 }
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287
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288 LOG(INFO) << "Scanning folder " << folder << " for plugins";
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289
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290 directory_iterator end_it; // default construction yields past-the-end
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291 for (directory_iterator it(folder);
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292 it != end_it;
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293 ++it)
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294 {
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295 std::string path = it->path().string();
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296
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297 if (is_directory(it->status()))
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298 {
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299 if (isRecursive)
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300 {
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301 ScanFolderForPlugins(path, true);
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302 }
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303 }
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304 else
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305 {
1323
5a92665dee23 Sample plugin: Serve folders
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306 std::string extension = boost::filesystem::extension(it->path());
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307 Toolbox::ToLowerCase(extension);
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308
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309 if (extension == PLUGIN_EXTENSION)
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310 {
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311 LOG(INFO) << "Found a shared library: " << it->path();
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312
1297
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313 SharedLibrary plugin(path);
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314 if (IsOrthancPlugin(plugin))
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315 {
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316 RegisterPlugin(path);
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317 }
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318 }
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319 }
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320 }
887
4066e6f2d134 PluginsManager
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321 }
1232
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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322
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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323
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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324 void PluginsManager::ListPlugins(std::list<std::string>& result) const
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325 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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326 result.clear();
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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327
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328 for (Plugins::const_iterator it = plugins_.begin();
1304
7b6925b0890d cppcheck
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329 it != plugins_.end(); ++it)
1232
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330 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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331 result.push_back(it->first);
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332 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
333 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
334
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
335
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
336 bool PluginsManager::HasPlugin(const std::string& name) const
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
337 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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338 return plugins_.find(name) != plugins_.end();
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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339 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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parents: 1200
diff changeset
340
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
341
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
342 const std::string& PluginsManager::GetPluginVersion(const std::string& name) const
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
343 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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344 Plugins::const_iterator it = plugins_.find(name);
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
345 if (it == plugins_.end())
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
346 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
347 throw OrthancException(ErrorCode_ParameterOutOfRange);
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
348 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
349 else
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
350 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
351 return it->second->GetVersion();
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
352 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
353 }
1644
939b921b2c81 plugin error dictionary
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diff changeset
354
939b921b2c81 plugin error dictionary
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diff changeset
355
939b921b2c81 plugin error dictionary
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parents: 1632
diff changeset
356 std::string PluginsManager::GetPluginName(SharedLibrary& library)
939b921b2c81 plugin error dictionary
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diff changeset
357 {
939b921b2c81 plugin error dictionary
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diff changeset
358 return CallGetName(library);
939b921b2c81 plugin error dictionary
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1632
diff changeset
359 }
887
4066e6f2d134 PluginsManager
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parents:
diff changeset
360 }