Mercurial > hg > orthanc

annotate Plugins/Engine/PluginsManager.cpp @ 1672:4c5a85c3ff43 db-changes

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sample database plugin now working
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 02 Oct 2015 12:20:49 +0200
parents 939b921b2c81
children b1291df2f780
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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 #if ORTHANC_PLUGINS_ENABLED != 1
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37 #error The plugin support is disabled
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38 #endif
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39
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40
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41 #include "../../Core/Toolbox.h"
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42 #include "../../Core/HttpServer/HttpOutput.h"
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43 #include "../../Core/Logging.h"
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44
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45 #include <cassert>
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46 #include <memory>
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47 #include <boost/filesystem.hpp>
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48
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49 #ifdef WIN32
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50 #define PLUGIN_EXTENSION ".dll"
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51 #elif defined(__linux) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__)
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52 #define PLUGIN_EXTENSION ".so"
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53 #elif defined(__APPLE__) && defined(__MACH__)
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54 #define PLUGIN_EXTENSION ".dylib"
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55 #else
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56 #error Support your platform here
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57 #endif
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58
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59
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60 namespace Orthanc
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61 {
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62 PluginsManager::Plugin::Plugin(PluginsManager& pluginManager,
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63 const std::string& path) :
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64 library_(path),
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65 pluginManager_(pluginManager)
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66 {
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67 memset(&context_, 0, sizeof(context_));
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68 context_.pluginsManager = this;
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69 context_.orthancVersion = ORTHANC_VERSION;
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70 context_.Free = ::free;
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71 context_.InvokeService = InvokeService;
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72 }
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73
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74
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75 static void CallInitialize(SharedLibrary& plugin,
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76 const OrthancPluginContext& context)
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77 {
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78 typedef int32_t (*Initialize) (const OrthancPluginContext*);
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79
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80 #if defined(_WIN32)
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81 Initialize initialize = (Initialize) plugin.GetFunction("OrthancPluginInitialize");
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82 #else
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83 /**
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84 * gcc would complain about "ISO C++ forbids casting between
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85 * pointer-to-function and pointer-to-object" without the trick
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86 * below, that is known as "the POSIX.1-2003 (Technical Corrigendum
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87 * 1) workaround". See the man page of "dlsym()".
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88 * http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
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89 * http://stackoverflow.com/a/14543811/881731
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90 **/
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91
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92 Initialize initialize;
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93 *(void **) (&initialize) = plugin.GetFunction("OrthancPluginInitialize");
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94 #endif
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95
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96 assert(initialize != NULL);
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97 int32_t error = initialize(&context);
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98
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99 if (error != 0)
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100 {
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101 LOG(ERROR) << "Error while initializing plugin " << plugin.GetPath()
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102 << " (code " << error << ")";
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103 throw OrthancException(ErrorCode_SharedLibrary);
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104 }
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105 }
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106
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107
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108 static void CallFinalize(SharedLibrary& plugin)
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109 {
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110 typedef void (*Finalize) ();
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111
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112 #if defined(_WIN32)
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113 Finalize finalize = (Finalize) plugin.GetFunction("OrthancPluginFinalize");
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114 #else
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115 Finalize finalize;
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116 *(void **) (&finalize) = plugin.GetFunction("OrthancPluginFinalize");
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117 #endif
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118
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119 assert(finalize != NULL);
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120 finalize();
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121 }
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122
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123
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124 static const char* CallGetName(SharedLibrary& plugin)
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125 {
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126 typedef const char* (*GetName) ();
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127
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128 #if defined(_WIN32)
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129 GetName getName = (GetName) plugin.GetFunction("OrthancPluginGetName");
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130 #else
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131 GetName getName;
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132 *(void **) (&getName) = plugin.GetFunction("OrthancPluginGetName");
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133 #endif
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134
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135 assert(getName != NULL);
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136 return getName();
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137 }
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138
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139
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140 static const char* CallGetVersion(SharedLibrary& plugin)
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141 {
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142 typedef const char* (*GetVersion) ();
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143
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144 #if defined(_WIN32)
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145 GetVersion getVersion = (GetVersion) plugin.GetFunction("OrthancPluginGetVersion");
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146 #else
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147 GetVersion getVersion;
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148 *(void **) (&getVersion) = plugin.GetFunction("OrthancPluginGetVersion");
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149 #endif
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150
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151 assert(getVersion != NULL);
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152 return getVersion();
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153 }
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154
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155
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156 OrthancPluginErrorCode PluginsManager::InvokeService(OrthancPluginContext* context,
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157 _OrthancPluginService service,
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158 const void* params)
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159 {
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160 switch (service)
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161 {
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162 case _OrthancPluginService_LogError:
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163 LOG(ERROR) << reinterpret_cast<const char*>(params);
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164 return OrthancPluginErrorCode_Success;
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165
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166 case _OrthancPluginService_LogWarning:
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167 LOG(WARNING) << reinterpret_cast<const char*>(params);
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168 return OrthancPluginErrorCode_Success;
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169
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170 case _OrthancPluginService_LogInfo:
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171 LOG(INFO) << reinterpret_cast<const char*>(params);
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172 return OrthancPluginErrorCode_Success;
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173
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174 default:
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175 break;
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176 }
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177
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178 Plugin* that = reinterpret_cast<Plugin*>(context->pluginsManager);
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179
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180 for (std::list<IPluginServiceProvider*>::iterator
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181 it = that->GetPluginManager().serviceProviders_.begin();
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182 it != that->GetPluginManager().serviceProviders_.end(); ++it)
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183 {
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184 try
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185 {
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186 if ((*it)->InvokeService(that->GetSharedLibrary(), service, params))
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187 {
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188 return OrthancPluginErrorCode_Success;
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189 }
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190 }
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191 catch (OrthancException& e)
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192 {
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193 // This service provider has failed
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194 LOG(ERROR) << "Exception while invoking plugin service " << service << ": " << e.What();
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195 return static_cast<OrthancPluginErrorCode>(e.GetErrorCode());
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196 }
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197 }
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198
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199 LOG(ERROR) << "Plugin invoking unknown service: " << service;
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200 return OrthancPluginErrorCode_UnknownPluginService;
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201 }
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202
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203
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204 PluginsManager::PluginsManager()
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205 {
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206 }
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207
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208 PluginsManager::~PluginsManager()
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209 {
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210 for (Plugins::iterator it = plugins_.begin(); it != plugins_.end(); ++it)
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211 {
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212 if (it->second != NULL)
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213 {
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214 LOG(WARNING) << "Unregistering plugin '" << it->first
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215 << "' (version " << it->second->GetVersion() << ")";
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216
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217 CallFinalize(it->second->GetSharedLibrary());
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218 delete it->second;
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219 }
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220 }
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221 }
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222
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223
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224 static bool IsOrthancPlugin(SharedLibrary& library)
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225 {
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226 return (library.HasFunction("OrthancPluginInitialize") &&
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227 library.HasFunction("OrthancPluginFinalize") &&
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228 library.HasFunction("OrthancPluginGetName") &&
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229 library.HasFunction("OrthancPluginGetVersion"));
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230 }
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231
887
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232
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233 void PluginsManager::RegisterPlugin(const std::string& path)
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234 {
1272
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diff changeset
235 if (!boost::filesystem::exists(path))
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236 {
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237 LOG(ERROR) << "Inexistent path to plugins: " << path;
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238 return;
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239 }
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240
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diff changeset
241 if (boost::filesystem::is_directory(path))
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242 {
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243 ScanFolderForPlugins(path, false);
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244 return;
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245 }
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246
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247 std::auto_ptr<Plugin> plugin(new Plugin(*this, path));
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248
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249 if (!IsOrthancPlugin(plugin->GetSharedLibrary()))
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250 {
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251 LOG(ERROR) << "Plugin " << plugin->GetSharedLibrary().GetPath()
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252 << " does not declare the proper entry functions";
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253 throw OrthancException(ErrorCode_SharedLibrary);
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254 }
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255
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diff changeset
256 std::string name(CallGetName(plugin->GetSharedLibrary()));
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257 if (plugins_.find(name) != plugins_.end())
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diff changeset
258 {
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259 LOG(ERROR) << "Plugin '" << name << "' already registered";
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diff changeset
260 throw OrthancException(ErrorCode_SharedLibrary);
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261 }
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262
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263 plugin->SetVersion(CallGetVersion(plugin->GetSharedLibrary()));
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264 LOG(WARNING) << "Registering plugin '" << name
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265 << "' (version " << plugin->GetVersion() << ")";
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266
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diff changeset
267 CallInitialize(plugin->GetSharedLibrary(), plugin->GetContext());
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268
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269 plugins_[name] = plugin.release();
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270 }
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271
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272
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diff changeset
273 void PluginsManager::ScanFolderForPlugins(const std::string& folder,
888
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diff changeset
274 bool isRecursive)
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275 {
d44b845c1c89 recursive scan for plugins
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diff changeset
276 using namespace boost::filesystem;
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277
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278 if (!exists(folder))
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
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279 {
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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280 return;
d44b845c1c89 recursive scan for plugins
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281 }
d44b845c1c89 recursive scan for plugins
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282
889
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283 LOG(INFO) << "Scanning folder " << folder << " for plugins";
888
d44b845c1c89 recursive scan for plugins
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284
d44b845c1c89 recursive scan for plugins
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285 directory_iterator end_it; // default construction yields past-the-end
889
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 888
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286 for (directory_iterator it(folder);
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
287 it != end_it;
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
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288 ++it)
d44b845c1c89 recursive scan for plugins
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289 {
889
Sebastien Jodogne <s.jodogne@gmail.com>
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290 std::string path = it->path().string();
Sebastien Jodogne <s.jodogne@gmail.com>
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291
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
292 if (is_directory(it->status()))
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
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293 {
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
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294 if (isRecursive)
d44b845c1c89 recursive scan for plugins
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295 {
889
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296 ScanFolderForPlugins(path, true);
888
d44b845c1c89 recursive scan for plugins
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297 }
d44b845c1c89 recursive scan for plugins
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parents: 887
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298 }
d44b845c1c89 recursive scan for plugins
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299 else
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
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300 {
1323
5a92665dee23 Sample plugin: Serve folders
Sebastien Jodogne <s.jodogne@gmail.com>
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301 std::string extension = boost::filesystem::extension(it->path());
5a92665dee23 Sample plugin: Serve folders
Sebastien Jodogne <s.jodogne@gmail.com>
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302 Toolbox::ToLowerCase(extension);
5a92665dee23 Sample plugin: Serve folders
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1304
diff changeset
303
5a92665dee23 Sample plugin: Serve folders
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1304
diff changeset
304 if (extension == PLUGIN_EXTENSION)
888
d44b845c1c89 recursive scan for plugins
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305 {
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
306 LOG(INFO) << "Found a shared library: " << it->path();
d44b845c1c89 recursive scan for plugins
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307
1297
501432928727 refactoring
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1288
diff changeset
308 SharedLibrary plugin(path);
501432928727 refactoring
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1288
diff changeset
309 if (IsOrthancPlugin(plugin))
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
310 {
1297
501432928727 refactoring
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parents: 1288
diff changeset
311 RegisterPlugin(path);
888
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
312 }
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
313 }
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
314 }
d44b845c1c89 recursive scan for plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 887
diff changeset
315 }
887
4066e6f2d134 PluginsManager
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
316 }
1232
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
317
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
318
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
319 void PluginsManager::ListPlugins(std::list<std::string>& result) const
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
320 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
321 result.clear();
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
322
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
323 for (Plugins::const_iterator it = plugins_.begin();
1304
7b6925b0890d cppcheck
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1297
diff changeset
324 it != plugins_.end(); ++it)
1232
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
325 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
326 result.push_back(it->first);
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
327 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
328 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
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
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
331 bool PluginsManager::HasPlugin(const std::string& name) const
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
332 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
333 return plugins_.find(name) != plugins_.end();
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
334 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
335
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
336
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
337 const std::string& PluginsManager::GetPluginVersion(const std::string& name) const
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
338 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
339 Plugins::const_iterator it = plugins_.find(name);
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
340 if (it == plugins_.end())
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
341 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
342 throw OrthancException(ErrorCode_ParameterOutOfRange);
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
343 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
344 else
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
345 {
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
346 return it->second->GetVersion();
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
347 }
f1c01451a8ee Introspection of plugins, Plugins can extend Orthanc Explorer with custom JavaScript
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1200
diff changeset
348 }
1644
939b921b2c81 plugin error dictionary
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1632
diff changeset
349
939b921b2c81 plugin error dictionary
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1632
diff changeset
350
939b921b2c81 plugin error dictionary
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1632
diff changeset
351 std::string PluginsManager::GetPluginName(SharedLibrary& library)
939b921b2c81 plugin error dictionary
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1632
diff changeset
352 {
939b921b2c81 plugin error dictionary
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1632
diff changeset
353 return CallGetName(library);
939b921b2c81 plugin error dictionary
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1632
diff changeset
354 }
887
4066e6f2d134 PluginsManager
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
355 }