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annotate Plugins/Engine/PluginsManager.cpp @ 1630:ffd23c0104af

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"/system" URI gives information about the plugins used for storage area and DB back-end
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 21 Sep 2015 13:26:45 +0200
parents c17b1142caab
children eb8fbcf008b5
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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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 "../../OrthancServer/PrecompiledHeadersServer.h"
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34 #include "PluginsManager.h"
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35
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36 #include "../../Core/Toolbox.h"
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37 #include "../../Core/HttpServer/HttpOutput.h"
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38 #include "../../Core/Logging.h"
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39
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40 #include <cassert>
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41 #include <memory>
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42 #include <boost/filesystem.hpp>
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43
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44 #ifdef WIN32
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45 #define PLUGIN_EXTENSION ".dll"
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46 #elif defined(__linux) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__)
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47 #define PLUGIN_EXTENSION ".so"
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48 #elif defined(__APPLE__) && defined(__MACH__)
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49 #define PLUGIN_EXTENSION ".dylib"
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50 #else
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51 #error Support your platform here
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52 #endif
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53
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54
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55 namespace Orthanc
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56 {
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57 PluginsManager::Plugin::Plugin(PluginsManager& pluginManager,
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58 const std::string& path) :
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59 library_(path),
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60 pluginManager_(pluginManager)
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61 {
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62 memset(&context_, 0, sizeof(context_));
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63 context_.pluginsManager = this;
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64 context_.orthancVersion = ORTHANC_VERSION;
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65 context_.Free = ::free;
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66 context_.InvokeService = InvokeService;
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67 }
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68
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69
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70 static void CallInitialize(SharedLibrary& plugin,
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71 const OrthancPluginContext& context)
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72 {
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73 typedef int32_t (*Initialize) (const OrthancPluginContext*);
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74
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75 #if defined(_WIN32)
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76 Initialize initialize = (Initialize) plugin.GetFunction("OrthancPluginInitialize");
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77 #else
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78 /**
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79 * gcc would complain about "ISO C++ forbids casting between
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80 * pointer-to-function and pointer-to-object" without the trick
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81 * below, that is known as "the POSIX.1-2003 (Technical Corrigendum
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82 * 1) workaround". See the man page of "dlsym()".
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83 * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
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84 * http://stackoverflow.com/a/14543811/881731
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85 **/
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86
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87 Initialize initialize;
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88 *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize");
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89 #endif
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90
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91 assert(initialize != NULL);
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92 int32_t error = initialize(&context);
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93
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94 if (error != 0)
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95 {
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96 LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath()
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97 << " (code " << error << ")";
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98 throw OrthancException(ErrorCode_SharedLibrary);
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99 }
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100 }
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101
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102
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103 static void CallFinalize(SharedLibrary& plugin)
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104 {
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105 typedef void (*Finalize) ();
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106
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107 #if defined(_WIN32)
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108 Finalize finalize = (Finalize) plugin.GetFunction("OrthancPluginFinalize");
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109 #else
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110 Finalize finalize;
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111 *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize");
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112 #endif
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113
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114 assert(finalize != NULL);
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115 finalize();
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116 }
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117
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118
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119 static const char* CallGetName(SharedLibrary& plugin)
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120 {
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121 typedef const char* (*GetName) ();
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122
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123 #if defined(_WIN32)
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124 GetName getName = (GetName) plugin.GetFunction("OrthancPluginGetName");
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125 #else
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126 GetName getName;
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127 *(void **) (&getName) = plugin.GetFunction("OrthancPluginGetName");
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128 #endif
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129
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130 assert(getName != NULL);
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131 return getName();
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132 }
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133
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134
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135 static const char* CallGetVersion(SharedLibrary& plugin)
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136 {
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137 typedef const char* (*GetVersion) ();
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138
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139 #if defined(_WIN32)
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140 GetVersion getVersion = (GetVersion) plugin.GetFunction("OrthancPluginGetVersion");
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141 #else
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142 GetVersion getVersion;
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143 *(void **) (&getVersion) = plugin.GetFunction("OrthancPluginGetVersion");
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144 #endif
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145
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146 assert(getVersion != NULL);
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147 return getVersion();
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148 }
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149
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150
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151 OrthancPluginErrorCode PluginsManager::InvokeService(OrthancPluginContext* context,
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152 _OrthancPluginService service,
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153 const void* params)
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154 {
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155 switch (service)
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156 {
907
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157 case _OrthancPluginService_LogError:
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158 LOG(ERROR) << reinterpret_cast<const char*>(params);
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159 return OrthancPluginErrorCode_Success;
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160
907
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161 case _OrthancPluginService_LogWarning:
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162 LOG(WARNING) << reinterpret_cast<const char*>(params);
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163 return OrthancPluginErrorCode_Success;
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164
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165 case _OrthancPluginService_LogInfo:
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166 LOG(INFO) << reinterpret_cast<const char*>(params);
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167 return OrthancPluginErrorCode_Success;
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168
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169 default:
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170 break;
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171 }
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172
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173 Plugin* that = reinterpret_cast<Plugin*>(context->pluginsManager);
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174
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175 for (std::list<IPluginServiceProvider*>::iterator
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176 it = that->GetPluginManager().serviceProviders_.begin();
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177 it != that->GetPluginManager().serviceProviders_.end(); ++it)
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178 {
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179 try
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180 {
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181 if ((*it)->InvokeService(that->GetSharedLibrary(), service, params))
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182 {
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183 return OrthancPluginErrorCode_Success;
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184 }
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185 }
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186 catch (OrthancException& e)
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187 {
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188 // This service provider has failed
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189 LOG(ERROR) << "Exception while invoking a plugin service: " << e.What();
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190 return static_cast<OrthancPluginErrorCode>(e.GetErrorCode());
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191 }
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192 }
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193
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194 LOG(ERROR) << "Plugin invoking unknown service: " << service;
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195 return OrthancPluginErrorCode_UnknownPluginService;
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196 }
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197
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198
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199 PluginsManager::PluginsManager()
887
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200 {
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201 }
4066e6f2d134 PluginsManager
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202
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203 PluginsManager::~PluginsManager()
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204 {
944
c068671d12a9 fixes thanks to cppcheck
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diff changeset
205 for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); ++it)
887
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206 {
888
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207 if (it->second != NULL)
887
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208 {
1232
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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parents: 1200
diff changeset
209 LOG(WARNING) << "Unregistering plugin '" << it->first
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
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210 << "' (version " << it->second->GetVersion() << ")";
893
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211
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diff changeset
212 CallFinalize(it->second->GetSharedLibrary());
888
d44b845c1c89 recursive scan for plugins
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diff changeset
213 delete it->second;
887
4066e6f2d134 PluginsManager
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214 }
4066e6f2d134 PluginsManager
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215 }
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216 }
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217
888
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218
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diff changeset
219 static bool IsOrthancPlugin(SharedLibrary& library)
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220 {
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diff changeset
221 return (library.HasFunction("OrthancPluginInitialize") &&
d44b845c1c89 recursive scan for plugins
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222 library.HasFunction("OrthancPluginFinalize") &&
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diff changeset
223 library.HasFunction("OrthancPluginGetName") &&
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Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
224 library.HasFunction("OrthancPluginGetVersion"));
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225 }
d44b845c1c89 recursive scan for plugins
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226
887
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227
4066e6f2d134 PluginsManager
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228 void PluginsManager::RegisterPlugin(const std::string& path)
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229 {
1272
7442097b41c9 Scan of folders for plugins
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diff changeset
230 if (!boost::filesystem::exists(path))
7442097b41c9 Scan of folders for plugins
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diff changeset
231 {
7442097b41c9 Scan of folders for plugins
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diff changeset
232 LOG(ERROR) << "Inexistent path to plugins: " << path;
7442097b41c9 Scan of folders for plugins
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diff changeset
233 return;
7442097b41c9 Scan of folders for plugins
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diff changeset
234 }
7442097b41c9 Scan of folders for plugins
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diff changeset
235
7442097b41c9 Scan of folders for plugins
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diff changeset
236 if (boost::filesystem::is_directory(path))
7442097b41c9 Scan of folders for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
237 {
7442097b41c9 Scan of folders for plugins
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diff changeset
238 ScanFolderForPlugins(path, false);
7442097b41c9 Scan of folders for plugins
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diff changeset
239 return;
7442097b41c9 Scan of folders for plugins
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diff changeset
240 }
7442097b41c9 Scan of folders for plugins
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parents: 1232
diff changeset
241
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ffd23c0104af "/system" URI gives information about the plugins used for storage area and DB back-end
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diff changeset
242 std::auto_ptr<Plugin> plugin(new Plugin(*this, path));
887
4066e6f2d134 PluginsManager
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243
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diff changeset
244 if (!IsOrthancPlugin(plugin->GetSharedLibrary()))
887
4066e6f2d134 PluginsManager
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parents:
diff changeset
245 {
1630
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diff changeset
246 LOG(ERROR) << "Plugin " << plugin->GetSharedLibrary().GetPath()
887
4066e6f2d134 PluginsManager
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parents:
diff changeset
247 << " does not declare the proper entry functions";
4066e6f2d134 PluginsManager
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diff changeset
248 throw OrthancException(ErrorCode_SharedLibrary);
4066e6f2d134 PluginsManager
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parents:
diff changeset
249 }
4066e6f2d134 PluginsManager
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parents:
diff changeset
250
1630
ffd23c0104af "/system" URI gives information about the plugins used for storage area and DB back-end
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diff changeset
251 std::string name(CallGetName(plugin->GetSharedLibrary()));
888
d44b845c1c89 recursive scan for plugins
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diff changeset
252 if (plugins_.find(name) != plugins_.end())
d44b845c1c89 recursive scan for plugins
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parents: 887
diff changeset
253 {
d44b845c1c89 recursive scan for plugins
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diff changeset
254 LOG(ERROR) << "Plugin '" << name << "' already registered";
d44b845c1c89 recursive scan for plugins
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diff changeset
255 throw OrthancException(ErrorCode_SharedLibrary);
d44b845c1c89 recursive scan for plugins
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diff changeset
256 }
d44b845c1c89 recursive scan for plugins
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diff changeset
257
1630
ffd23c0104af "/system" URI gives information about the plugins used for storage area and DB back-end
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diff changeset
258 plugin->SetVersion(CallGetVersion(plugin->GetSharedLibrary()));
888
d44b845c1c89 recursive scan for plugins
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diff changeset
259 LOG(WARNING) << "Registering plugin '" << name
1232
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
260 << "' (version " << plugin->GetVersion() << ")";
887
4066e6f2d134 PluginsManager
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diff changeset
261
1630
ffd23c0104af "/system" URI gives information about the plugins used for storage area and DB back-end
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parents: 1625
diff changeset
262 CallInitialize(plugin->GetSharedLibrary(), plugin->GetContext());
887
4066e6f2d134 PluginsManager
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diff changeset
263
888
d44b845c1c89 recursive scan for plugins
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diff changeset
264 plugins_[name] = plugin.release();
d44b845c1c89 recursive scan for plugins
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diff changeset
265 }
d44b845c1c89 recursive scan for plugins
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diff changeset
266
d44b845c1c89 recursive scan for plugins
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diff changeset
267
889
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
268 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
269 bool isRecursive)
d44b845c1c89 recursive scan for plugins
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diff changeset
270 {
d44b845c1c89 recursive scan for plugins
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diff changeset
271 using namespace boost::filesystem;
d44b845c1c89 recursive scan for plugins
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diff changeset
272
889
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
273 if (!exists(folder))
888
d44b845c1c89 recursive scan for plugins
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diff changeset
274 {
d44b845c1c89 recursive scan for plugins
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diff changeset
275 return;
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
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diff changeset
278 LOG(INFO) << "Scanning folder " << folder << " for plugins";
888
d44b845c1c89 recursive scan for plugins
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279
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280 directory_iterator end_it; // default construction yields past-the-end
889
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281 for (directory_iterator it(folder);
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282 it != end_it;
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283 ++it)
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284 {
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285 std::string path = it->path().string();
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286
888
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287 if (is_directory(it->status()))
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288 {
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289 if (isRecursive)
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290 {
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291 ScanFolderForPlugins(path, true);
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292 }
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293 }
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294 else
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295 {
1323
5a92665dee23 Sample plugin: Serve folders
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296 std::string extension = boost::filesystem::extension(it->path());
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297 Toolbox::ToLowerCase(extension);
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298
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299 if (extension == PLUGIN_EXTENSION)
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300 {
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301 LOG(INFO) << "Found a shared library: " << it->path();
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302
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303 SharedLibrary plugin(path);
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304 if (IsOrthancPlugin(plugin))
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305 {
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306 RegisterPlugin(path);
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307 }
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308 }
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309 }
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310 }
887
4066e6f2d134 PluginsManager
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311 }
1232
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312
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313
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314 void PluginsManager::ListPlugins(std::list<std::string>& result) const
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315 {
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316 result.clear();
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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317
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318 for (Plugins::const_iterator it = plugins_.begin();
1304
7b6925b0890d cppcheck
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319 it != plugins_.end(); ++it)
1232
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320 {
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321 result.push_back(it->first);
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322 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
323 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
324
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
325
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
326 bool PluginsManager::HasPlugin(const std::string& name) const
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327 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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328 return plugins_.find(name) != plugins_.end();
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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329 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
330
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
331
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
332 const std::string& PluginsManager::GetPluginVersion(const std::string& name) const
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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 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
335 if (it == plugins_.end())
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
336 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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diff changeset
337 throw OrthancException(ErrorCode_ParameterOutOfRange);
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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338 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
339 else
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
340 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
341 return it->second->GetVersion();
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
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parents: 1200
diff changeset
342 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
343 }
887
4066e6f2d134 PluginsManager
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parents:
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344 }