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annotate Framework/Plugins/StorageBackend.cpp @ 12:41543239072d

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transactions for storage area
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 09 Jul 2018 18:34:56 +0200
parents d17b2631bb67
children 9774802fd05f
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Sebastien Jodogne <s.jodogne@gmail.com>
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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) 2017-2018 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 Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "StorageBackend.h"
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23
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24 #if HAS_ORTHANC_EXCEPTION != 1
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25 # error HAS_ORTHANC_EXCEPTION must be set to 1
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26 #endif
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27
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28 #include <Core/OrthancException.h>
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29
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30
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31 #define ORTHANC_PLUGINS_DATABASE_CATCH \
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32 catch (::Orthanc::OrthancException& e) \
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33 { \
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34 return static_cast<OrthancPluginErrorCode>(e.GetErrorCode()); \
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35 } \
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36 catch (::std::runtime_error& e) \
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37 { \
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38 std::string s = "Exception in storage area back-end: " + std::string(e.what()); \
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39 OrthancPluginLogError(context_, s.c_str()); \
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40 return OrthancPluginErrorCode_DatabasePlugin; \
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41 } \
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42 catch (...) \
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43 { \
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44 OrthancPluginLogError(context_, "Native exception"); \
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45 return OrthancPluginErrorCode_DatabasePlugin; \
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46 }
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47
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48
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49 namespace OrthancDatabases
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50 {
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51 void StorageBackend::ReadFromString(void*& buffer,
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52 size_t& size,
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53 const std::string& content)
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54 {
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55 size = content.size();
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56
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57 if (content.empty())
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58 {
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59 buffer = NULL;
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60 }
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61 else
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62 {
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63 buffer = malloc(size);
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64
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65 if (buffer == NULL)
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66 {
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67 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotEnoughMemory);
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68 }
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69
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70 memcpy(buffer, content.c_str(), size);
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71 }
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72 }
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73
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74
1
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75 StorageBackend::StorageBackend(IDatabaseFactory* factory) :
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76 manager_(factory)
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77 {
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78 }
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79
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80
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81 static OrthancPluginContext* context_ = NULL;
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82 static std::auto_ptr<StorageBackend> backend_;
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83
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84
1
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85 static OrthancPluginErrorCode StorageCreate(const char* uuid,
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86 const void* content,
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87 int64_t size,
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88 OrthancPluginContentType type)
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89 {
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90 try
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91 {
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92 DatabaseManager::Transaction transaction(backend_->GetManager());
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93 backend_->Create(transaction, uuid, content, static_cast<size_t>(size), type);
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94 transaction.Commit();
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95 return OrthancPluginErrorCode_Success;
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96 }
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97 ORTHANC_PLUGINS_DATABASE_CATCH;
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98 }
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99
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100
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101 static OrthancPluginErrorCode StorageRead(void** content,
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102 int64_t* size,
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103 const char* uuid,
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104 OrthancPluginContentType type)
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105 {
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106 try
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107 {
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108 DatabaseManager::Transaction transaction(backend_->GetManager());
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109 size_t tmp;
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110 backend_->Read(*content, tmp, transaction, uuid, type);
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111 *size = static_cast<int64_t>(tmp);
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112 transaction.Commit();
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113 return OrthancPluginErrorCode_Success;
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114 }
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115 ORTHANC_PLUGINS_DATABASE_CATCH;
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116 }
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117
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118
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119 static OrthancPluginErrorCode StorageRemove(const char* uuid,
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120 OrthancPluginContentType type)
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121 {
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122 try
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123 {
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124 DatabaseManager::Transaction transaction(backend_->GetManager());
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125 backend_->Remove(transaction, uuid, type);
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126 transaction.Commit();
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127 return OrthancPluginErrorCode_Success;
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128 }
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129 ORTHANC_PLUGINS_DATABASE_CATCH;
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130 }
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131
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132
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133 void StorageBackend::Register(OrthancPluginContext* context,
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134 StorageBackend* backend)
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135 {
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136 if (context == NULL ||
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137 backend == NULL)
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138 {
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139 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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140 }
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141
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142 if (context_ != NULL ||
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143 backend_.get() != NULL)
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144 {
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145 // This function can only be invoked once in the plugin
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146 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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147 }
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148 else
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149 {
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150 context_ = context;
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151 backend_.reset(backend);
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152
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153 OrthancPluginRegisterStorageArea(context_, StorageCreate, StorageRead, StorageRemove);
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154 }
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155 }
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156
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157
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158 void StorageBackend::Finalize()
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159 {
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160 backend_.reset(NULL);
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161 context_ = NULL;
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162 }
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163 }