Mercurial > hg > orthanc-databases
annotate Framework/Plugins/StorageBackend.cpp @ 583:ae7375d38607 find-refactoring tip
MySQL: fix ordering
author | Alain Mazy <am@orthanc.team> |
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date | Mon, 21 Oct 2024 18:19:51 +0200 |
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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) 2017-2023 Osimis S.A., Belgium |
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium |
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
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8 * |
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9 * This program is free software: you can redistribute it and/or |
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10 * modify it under the terms of the GNU Affero General Public License |
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11 * as published by the Free Software Foundation, either version 3 of |
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12 * the License, or (at your option) any later version. |
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13 * |
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14 * This program is distributed in the hope that it will be useful, but |
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 * Affero General Public License for more details. |
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18 * |
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19 * You should have received a copy of the GNU Affero General Public License |
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20 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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21 **/ |
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22 |
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23 |
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24 #include "StorageBackend.h" |
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25 |
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26 #if HAS_ORTHANC_EXCEPTION != 1 |
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27 # error HAS_ORTHANC_EXCEPTION must be set to 1 |
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28 #endif |
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29 |
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30 #include "../../Framework/Common/BinaryStringValue.h" |
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31 #include "../../Framework/Common/ResultFileValue.h" |
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32 |
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33 #include <Compatibility.h> // For std::unique_ptr<> |
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34 #include <Logging.h> |
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36 |
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37 #include <boost/thread.hpp> |
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38 #include <cassert> |
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39 #include <limits> |
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40 |
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41 |
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42 #define ORTHANC_PLUGINS_DATABASE_CATCH \ |
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43 catch (::Orthanc::OrthancException& e) \ |
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44 { \ |
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45 return static_cast<OrthancPluginErrorCode>(e.GetErrorCode()); \ |
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46 } \ |
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47 catch (::std::runtime_error& e) \ |
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48 { \ |
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49 std::string s = "Exception in storage area back-end: " + std::string(e.what()); \ |
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50 OrthancPluginLogError(context_, s.c_str()); \ |
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51 return OrthancPluginErrorCode_DatabasePlugin; \ |
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52 } \ |
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53 catch (...) \ |
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54 { \ |
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55 OrthancPluginLogError(context_, "Native exception"); \ |
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56 return OrthancPluginErrorCode_DatabasePlugin; \ |
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57 } |
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58 |
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59 |
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60 namespace OrthancDatabases |
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61 { |
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62 class StorageBackend::ReadWholeOperation : public StorageBackend::IDatabaseOperation |
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63 { |
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64 private: |
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65 IFileContentVisitor& visitor_; |
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66 const char* uuid_; |
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67 OrthancPluginContentType type_; |
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68 |
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69 public: |
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70 ReadWholeOperation(IFileContentVisitor& visitor, |
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71 const char* uuid, |
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72 OrthancPluginContentType type) : |
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73 visitor_(visitor), |
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74 uuid_(uuid), |
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75 type_(type) |
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76 { |
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77 } |
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78 |
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79 virtual void Execute(StorageBackend::IAccessor& accessor) ORTHANC_OVERRIDE |
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80 { |
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81 accessor.ReadWhole(visitor_, uuid_, type_); |
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82 } |
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83 }; |
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84 |
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85 |
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86 StorageBackend::StorageBackend(IDatabaseFactory* factory, |
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87 unsigned int maxRetries) : |
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88 manager_(factory), |
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89 maxRetries_(maxRetries) |
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90 { |
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91 } |
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92 |
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93 void StorageBackend::AccessorBase::Create(const std::string& uuid, |
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94 const void* content, |
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95 size_t size, |
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96 OrthancPluginContentType type) |
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97 { |
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98 DatabaseManager::Transaction transaction(manager_, TransactionType_ReadWrite); |
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99 |
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100 { |
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101 DatabaseManager::CachedStatement statement( |
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102 STATEMENT_FROM_HERE, manager_, |
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103 "INSERT INTO StorageArea VALUES (${uuid}, ${content}, ${type})"); |
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104 |
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105 statement.SetParameterType("uuid", ValueType_Utf8String); |
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106 statement.SetParameterType("content", ValueType_InputFile); |
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107 statement.SetParameterType("type", ValueType_Integer64); |
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108 |
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109 Dictionary args; |
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110 args.SetUtf8Value("uuid", uuid); |
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111 args.SetFileValue("content", content, size); |
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112 args.SetIntegerValue("type", type); |
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113 |
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114 statement.Execute(args); |
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115 } |
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116 |
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117 transaction.Commit(); |
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118 } |
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119 |
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120 |
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121 void StorageBackend::AccessorBase::ReadWhole(StorageBackend::IFileContentVisitor& visitor, |
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122 const std::string& uuid, |
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123 OrthancPluginContentType type) |
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124 { |
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125 DatabaseManager::Transaction transaction(manager_, TransactionType_ReadOnly); |
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126 |
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127 { |
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128 DatabaseManager::CachedStatement statement( |
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129 STATEMENT_FROM_HERE, manager_, |
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130 "SELECT content FROM StorageArea WHERE uuid=${uuid} AND type=${type}"); |
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131 |
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132 statement.SetParameterType("uuid", ValueType_Utf8String); |
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133 statement.SetParameterType("type", ValueType_Integer64); |
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134 |
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135 Dictionary args; |
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136 args.SetUtf8Value("uuid", uuid); |
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137 args.SetIntegerValue("type", type); |
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138 |
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139 statement.Execute(args); |
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140 |
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141 if (statement.IsDone()) |
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142 { |
505 | 143 throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource, "ReadWhole: No content found for storage."); |
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144 } |
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145 else if (statement.GetResultFieldsCount() != 1) |
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146 { |
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147 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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148 } |
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149 else |
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150 { |
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151 const IValue& value = statement.GetResultField(0); |
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152 |
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153 switch (value.GetType()) |
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154 { |
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155 case ValueType_ResultFile: |
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156 { |
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157 std::string content; |
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158 dynamic_cast<const ResultFileValue&>(value).ReadWhole(content); |
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159 visitor.Assign(content); |
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160 break; |
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161 } |
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162 |
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163 case ValueType_BinaryString: |
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164 visitor.Assign(dynamic_cast<const BinaryStringValue&>(value).GetContent()); |
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165 break; |
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166 |
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167 default: |
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168 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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169 } |
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170 } |
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171 } |
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172 |
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173 transaction.Commit(); |
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174 |
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175 if (!visitor.IsSuccess()) |
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176 { |
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177 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database, "Could not read attachment from the storage area"); |
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178 } |
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179 } |
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180 |
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181 |
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182 void StorageBackend::AccessorBase::ReadRange(IFileContentVisitor& visitor, |
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183 const std::string& uuid, |
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184 OrthancPluginContentType type, |
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185 uint64_t start, |
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186 size_t length) |
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187 { |
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188 /** |
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189 * This is a generic implementation, that will only work if |
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190 * "ResultFileValue" is implemented by the database backend. For |
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191 * instance, this will *not* work with MySQL, as the latter uses |
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192 * BLOB columns to store files. |
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193 **/ |
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194 DatabaseManager::Transaction transaction(manager_, TransactionType_ReadOnly); |
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195 |
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196 { |
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197 DatabaseManager::CachedStatement statement( |
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198 STATEMENT_FROM_HERE, manager_, |
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199 "SELECT content FROM StorageArea WHERE uuid=${uuid} AND type=${type}"); |
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200 |
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201 statement.SetParameterType("uuid", ValueType_Utf8String); |
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202 statement.SetParameterType("type", ValueType_Integer64); |
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203 |
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204 Dictionary args; |
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205 args.SetUtf8Value("uuid", uuid); |
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206 args.SetIntegerValue("type", type); |
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207 |
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208 statement.Execute(args); |
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209 |
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210 if (statement.IsDone()) |
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211 { |
505 | 212 throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource, "ReadRange: No content found for storage."); |
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213 } |
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214 else if (statement.GetResultFieldsCount() != 1) |
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215 { |
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216 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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217 } |
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218 else |
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219 { |
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220 const IValue& value = statement.GetResultField(0); |
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221 if (value.GetType() == ValueType_ResultFile) |
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222 { |
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223 std::string content; |
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224 dynamic_cast<const ResultFileValue&>(value).ReadRange(content, start, length); |
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225 visitor.Assign(content); |
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226 } |
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227 else |
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228 { |
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229 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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230 } |
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231 } |
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232 } |
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233 |
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234 transaction.Commit(); |
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235 |
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236 if (!visitor.IsSuccess()) |
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237 { |
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238 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database, "Could not read attachment from the storage area"); |
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239 } |
242
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240 } |
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241 |
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242 |
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243 void StorageBackend::AccessorBase::Remove(const std::string& uuid, |
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244 OrthancPluginContentType type) |
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245 { |
230
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246 DatabaseManager::Transaction transaction(manager_, TransactionType_ReadWrite); |
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247 |
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248 { |
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249 DatabaseManager::CachedStatement statement( |
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250 STATEMENT_FROM_HERE, manager_, |
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251 "DELETE FROM StorageArea WHERE uuid=${uuid} AND type=${type}"); |
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252 |
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253 statement.SetParameterType("uuid", ValueType_Utf8String); |
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254 statement.SetParameterType("type", ValueType_Integer64); |
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255 |
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256 Dictionary args; |
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257 args.SetUtf8Value("uuid", uuid); |
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258 args.SetIntegerValue("type", type); |
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259 |
230
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260 statement.Execute(args); |
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261 } |
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262 |
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263 transaction.Commit(); |
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264 } |
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265 |
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266 |
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267 static OrthancPluginContext* context_ = NULL; |
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268 static std::unique_ptr<StorageBackend> backend_; |
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269 |
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270 |
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271 static OrthancPluginErrorCode StorageCreate(const char* uuid, |
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272 const void* content, |
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273 int64_t size, |
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274 OrthancPluginContentType type) |
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275 { |
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276 class Operation : public StorageBackend::IDatabaseOperation |
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277 { |
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278 private: |
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279 const char* uuid_; |
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280 const void* content_; |
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281 int64_t size_; |
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282 OrthancPluginContentType type_; |
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283 |
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284 public: |
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285 Operation(const char* uuid, |
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286 const void* content, |
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287 int64_t size, |
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288 OrthancPluginContentType type) : |
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289 uuid_(uuid), |
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290 content_(content), |
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291 size_(size), |
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292 type_(type) |
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293 { |
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294 } |
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295 |
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296 virtual void Execute(StorageBackend::IAccessor& accessor) ORTHANC_OVERRIDE |
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297 { |
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298 accessor.Create(uuid_, content_, size_, type_); |
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299 } |
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300 }; |
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301 |
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302 |
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303 try |
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304 { |
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305 if (backend_.get() == NULL) |
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306 { |
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307 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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308 } |
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309 else |
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310 { |
269
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311 Operation operation(uuid, content, size, type); |
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312 backend_->Execute(operation); |
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313 return OrthancPluginErrorCode_Success; |
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314 } |
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315 } |
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316 ORTHANC_PLUGINS_DATABASE_CATCH; |
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317 } |
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318 |
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319 |
271
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320 #if defined(ORTHANC_PLUGINS_VERSION_IS_ABOVE) |
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321 # if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 9, 0) |
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322 static OrthancPluginErrorCode StorageReadWhole(OrthancPluginMemoryBuffer64* target, |
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323 const char* uuid, |
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324 OrthancPluginContentType type) |
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325 { |
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326 class Visitor : public StorageBackend::IFileContentVisitor |
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327 { |
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328 private: |
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329 OrthancPluginMemoryBuffer64* target_; |
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330 bool success_; |
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331 |
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332 public: |
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333 Visitor(OrthancPluginMemoryBuffer64* target) : |
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334 target_(target), |
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335 success_(false) |
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336 { |
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337 if (target == NULL) |
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338 { |
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339 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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340 } |
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341 } |
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342 |
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343 virtual bool IsSuccess() const ORTHANC_OVERRIDE |
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344 { |
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345 return success_; |
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346 } |
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347 |
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348 virtual void Assign(const std::string& content) ORTHANC_OVERRIDE |
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349 { |
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350 if (success_) |
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351 { |
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352 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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353 } |
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354 else |
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355 { |
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356 assert(context_ != NULL); |
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357 |
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358 if (OrthancPluginCreateMemoryBuffer64(context_, target_, static_cast<uint64_t>(content.size())) != |
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359 OrthancPluginErrorCode_Success) |
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360 { |
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361 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotEnoughMemory); |
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362 } |
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363 |
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364 if (!content.empty()) |
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365 { |
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366 memcpy(target_->data, content.c_str(), content.size()); |
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367 } |
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368 |
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369 success_ = true; |
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370 } |
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371 } |
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372 }; |
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373 |
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374 |
1
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375 try |
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376 { |
219
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377 if (backend_.get() == NULL) |
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378 { |
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379 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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380 } |
242
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381 else |
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382 { |
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383 Visitor visitor(target); |
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384 |
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385 { |
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386 StorageBackend::ReadWholeOperation operation(visitor, uuid, type); |
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387 backend_->Execute(operation); |
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388 } |
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389 |
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390 return OrthancPluginErrorCode_Success; |
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391 } |
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392 } |
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393 ORTHANC_PLUGINS_DATABASE_CATCH; |
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394 } |
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395 |
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396 |
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397 static OrthancPluginErrorCode StorageReadRange(OrthancPluginMemoryBuffer64* target, |
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398 const char* uuid, |
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399 OrthancPluginContentType type, |
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400 uint64_t start) |
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401 { |
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402 class Visitor : public StorageBackend::IFileContentVisitor |
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403 { |
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404 private: |
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405 OrthancPluginMemoryBuffer64* target_; // This buffer is already allocated by the Orthanc core |
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406 bool success_; |
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407 |
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408 public: |
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409 Visitor(OrthancPluginMemoryBuffer64* target) : |
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410 target_(target), |
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411 success_(false) |
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412 { |
242
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413 if (target == NULL) |
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414 { |
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415 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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416 } |
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417 } |
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418 |
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419 virtual bool IsSuccess() const ORTHANC_OVERRIDE |
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420 { |
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421 return success_; |
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422 } |
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423 |
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424 virtual void Assign(const std::string& content) ORTHANC_OVERRIDE |
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425 { |
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426 if (success_) |
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427 { |
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428 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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429 } |
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430 else |
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431 { |
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432 if (content.size() != target_->size) |
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433 { |
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434 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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435 } |
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436 |
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437 if (!content.empty()) |
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438 { |
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439 memcpy(target_->data, content.c_str(), content.size()); |
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440 } |
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441 |
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442 success_ = true; |
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443 } |
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444 } |
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445 }; |
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446 |
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447 |
269
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448 class Operation : public StorageBackend::IDatabaseOperation |
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449 { |
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450 private: |
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451 Visitor& visitor_; |
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452 const char* uuid_; |
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453 OrthancPluginContentType type_; |
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454 uint64_t start_; |
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455 size_t length_; |
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456 |
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457 public: |
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458 Operation(Visitor& visitor, |
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459 const char* uuid, |
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460 OrthancPluginContentType type, |
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461 uint64_t start, |
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462 size_t length) : |
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463 visitor_(visitor), |
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464 uuid_(uuid), |
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465 type_(type), |
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466 start_(start), |
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467 length_(length) |
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468 { |
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469 } |
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470 |
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471 virtual void Execute(StorageBackend::IAccessor& accessor) ORTHANC_OVERRIDE |
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472 { |
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473 accessor.ReadRange(visitor_, uuid_, type_, start_, length_); |
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474 } |
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475 }; |
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476 |
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477 |
242
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478 try |
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479 { |
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480 if (backend_.get() == NULL) |
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481 { |
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482 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
219
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483 } |
230
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484 else |
194
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485 { |
230
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486 Visitor visitor(target); |
219
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487 |
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488 { |
269
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489 Operation operation(visitor, uuid, type, start, target->size); |
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490 backend_->Execute(operation); |
219
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491 } |
230
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492 |
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493 return OrthancPluginErrorCode_Success; |
194
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494 } |
1
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495 } |
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496 ORTHANC_PLUGINS_DATABASE_CATCH; |
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497 } |
271
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498 # endif |
195
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499 #endif |
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500 |
219
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501 |
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502 static OrthancPluginErrorCode StorageRead(void** data, |
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503 int64_t* size, |
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504 const char* uuid, |
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505 OrthancPluginContentType type) |
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506 { |
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507 class Visitor : public StorageBackend::IFileContentVisitor |
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508 { |
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509 private: |
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510 void** data_; |
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511 int64_t* size_; |
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512 bool success_; |
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513 |
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514 public: |
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515 Visitor(void** data, |
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516 int64_t* size) : |
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517 data_(data), |
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518 size_(size), |
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519 success_(false) |
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520 { |
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521 } |
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522 |
252 | 523 ~Visitor() |
524 { | |
525 if (data_ != NULL /* this condition is invalidated by "Release()" */ && | |
526 *data_ != NULL) | |
527 { | |
528 free(*data_); | |
529 } | |
530 } | |
531 | |
532 void Release() | |
533 { | |
534 data_ = NULL; | |
535 } | |
536 | |
230
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537 virtual bool IsSuccess() const ORTHANC_OVERRIDE |
219
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538 { |
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539 return success_; |
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540 } |
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541 |
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542 virtual void Assign(const std::string& content) ORTHANC_OVERRIDE |
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543 { |
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544 if (success_) |
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545 { |
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546 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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547 } |
252 | 548 else if (data_ == NULL) |
549 { | |
550 // "Release()" has been called | |
551 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
552 } | |
219
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553 else |
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554 { |
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555 if (content.empty()) |
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556 { |
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557 *data_ = NULL; |
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558 *size_ = 0; |
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559 } |
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560 else |
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561 { |
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562 *size_ = static_cast<int64_t>(content.size()); |
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563 |
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564 if (static_cast<size_t>(*size_) != content.size()) |
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565 { |
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566 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotEnoughMemory, |
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567 "File cannot be stored in a 63bit buffer"); |
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568 } |
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569 |
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570 *data_ = malloc(*size_); |
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571 if (*data_ == NULL) |
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572 { |
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573 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotEnoughMemory); |
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574 } |
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575 |
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576 memcpy(*data_, content.c_str(), *size_); |
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577 } |
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578 |
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579 success_ = true; |
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580 } |
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581 } |
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582 }; |
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583 |
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584 |
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585 try |
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586 { |
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587 if (backend_.get() == NULL) |
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588 { |
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589 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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590 } |
230
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591 else if (data == NULL || |
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592 size == NULL) |
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593 { |
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594 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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595 } |
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596 else |
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597 { |
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598 Visitor visitor(data, size); |
219
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599 |
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600 { |
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601 StorageBackend::ReadWholeOperation operation(visitor, uuid, type); |
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602 backend_->Execute(operation); |
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603 } |
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604 |
252 | 605 visitor.Release(); |
606 | |
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607 return OrthancPluginErrorCode_Success; |
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608 } |
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609 } |
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610 ORTHANC_PLUGINS_DATABASE_CATCH; |
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611 } |
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612 |
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613 |
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614 static OrthancPluginErrorCode StorageRemove(const char* uuid, |
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615 OrthancPluginContentType type) |
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616 { |
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617 class Operation : public StorageBackend::IDatabaseOperation |
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618 { |
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619 private: |
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620 const char* uuid_; |
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621 OrthancPluginContentType type_; |
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622 |
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623 public: |
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624 Operation(const char* uuid, |
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625 OrthancPluginContentType type) : |
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626 uuid_(uuid), |
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627 type_(type) |
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628 { |
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629 } |
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630 |
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631 virtual void Execute(StorageBackend::IAccessor& accessor) ORTHANC_OVERRIDE |
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632 { |
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633 accessor.Remove(uuid_, type_); |
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634 } |
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635 }; |
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636 |
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637 |
1
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638 try |
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639 { |
230
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640 if (backend_.get() == NULL) |
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641 { |
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642 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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643 } |
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644 else |
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645 { |
269
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646 Operation operation(uuid, type); |
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647 backend_->Execute(operation); |
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648 return OrthancPluginErrorCode_Success; |
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649 } |
1
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650 } |
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651 ORTHANC_PLUGINS_DATABASE_CATCH; |
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652 } |
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653 |
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654 |
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655 void StorageBackend::Register(OrthancPluginContext* context, |
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656 StorageBackend* backend) |
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657 { |
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658 if (context == NULL || |
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659 backend == NULL) |
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660 { |
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661 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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662 } |
269
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663 else if (context_ != NULL || |
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664 backend_.get() != NULL) |
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665 { |
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666 // This function can only be invoked once in the plugin |
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667 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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668 } |
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669 else |
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670 { |
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671 context_ = context; |
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672 backend_.reset(backend); |
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673 |
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674 bool hasLoadedV2 = false; |
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675 |
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676 #if defined(ORTHANC_PLUGINS_VERSION_IS_ABOVE) // Macro introduced in Orthanc 1.3.1 |
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677 # if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 9, 0) |
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678 if (OrthancPluginCheckVersionAdvanced(context, 1, 9, 0) == 1) |
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679 { |
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680 OrthancPluginStorageReadRange readRange = NULL; |
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681 if (backend_->HasReadRange()) |
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682 { |
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683 readRange = StorageReadRange; |
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684 } |
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685 |
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686 OrthancPluginRegisterStorageArea2(context_, StorageCreate, StorageReadWhole, readRange, StorageRemove); |
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687 hasLoadedV2 = true; |
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688 } |
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689 # endif |
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690 #endif |
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691 |
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692 if (!hasLoadedV2) |
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693 { |
278
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694 LOG(WARNING) << "Performance warning: Your version of the Orthanc core or SDK doesn't support reading of file ranges"; |
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695 OrthancPluginRegisterStorageArea(context_, StorageCreate, StorageRead, StorageRemove); |
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696 } |
270 | 697 |
698 LOG(WARNING) << "The storage area plugin will retry up to " << backend_->GetMaxRetries() | |
699 << " time(s) in the case of a collision"; | |
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700 } |
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701 } |
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|
702 |
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703 |
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704 void StorageBackend::Finalize() |
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705 { |
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706 backend_.reset(NULL); |
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707 context_ = NULL; |
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708 } |
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709 |
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710 |
242
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711 class StorageBackend::StringVisitor : public StorageBackend::IFileContentVisitor |
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712 { |
242
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713 private: |
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714 std::string& target_; |
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715 bool success_; |
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716 |
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717 public: |
252 | 718 explicit StringVisitor(std::string& target) : |
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719 target_(target), |
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720 success_(false) |
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721 { |
242
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722 } |
219
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723 |
242
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724 virtual bool IsSuccess() const ORTHANC_OVERRIDE |
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725 { |
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726 return success_; |
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727 } |
219
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728 |
242
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729 virtual void Assign(const std::string& content) ORTHANC_OVERRIDE |
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730 { |
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731 if (success_) |
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732 { |
242
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733 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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734 } |
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735 else |
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736 { |
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737 target_.assign(content); |
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738 success_ = true; |
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739 } |
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740 } |
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741 }; |
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742 |
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743 |
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744 void StorageBackend::ReadWholeToString(std::string& target, |
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745 IAccessor& accessor, |
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746 const std::string& uuid, |
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747 OrthancPluginContentType type) |
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748 { |
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749 StringVisitor visitor(target); |
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750 accessor.ReadWhole(visitor, uuid, type); |
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751 |
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752 if (!visitor.IsSuccess()) |
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753 { |
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754 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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755 } |
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756 } |
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757 |
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758 |
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759 void StorageBackend::ReadRangeToString(std::string& target, |
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760 IAccessor& accessor, |
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761 const std::string& uuid, |
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762 OrthancPluginContentType type, |
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763 uint64_t start, |
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764 size_t length) |
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765 { |
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766 StringVisitor visitor(target); |
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767 accessor.ReadRange(visitor, uuid, type, start, length); |
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768 |
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769 if (!visitor.IsSuccess()) |
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770 { |
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771 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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772 } |
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773 } |
269
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774 |
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775 |
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776 void StorageBackend::Execute(IDatabaseOperation& operation) |
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777 { |
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778 std::unique_ptr<IAccessor> accessor(CreateAccessor()); |
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779 if (accessor.get() == NULL) |
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780 { |
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781 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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782 } |
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783 |
323 | 784 #if ORTHANC_FRAMEWORK_VERSION_IS_ABOVE(1, 9, 2) |
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785 unsigned int attempt = 0; |
323 | 786 #endif |
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787 |
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788 for (;;) |
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789 { |
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790 try |
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791 { |
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792 operation.Execute(*accessor); |
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793 return; // Success |
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794 } |
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795 catch (Orthanc::OrthancException& e) |
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796 { |
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797 #if ORTHANC_FRAMEWORK_VERSION_IS_ABOVE(1, 9, 2) |
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798 if (e.GetErrorCode() == Orthanc::ErrorCode_DatabaseCannotSerialize) |
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799 { |
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800 if (attempt >= maxRetries_) |
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801 { |
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802 throw; |
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803 } |
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804 else |
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805 { |
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806 attempt++; |
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807 |
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808 // The "rand()" adds some jitter to de-synchronize writers |
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809 boost::this_thread::sleep(boost::posix_time::milliseconds(100 * attempt + 5 * (rand() % 10))); |
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810 } |
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811 } |
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812 else |
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813 { |
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814 throw; |
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815 } |
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816 #else |
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817 throw; |
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818 #endif |
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819 } |
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820 } |
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821 } |
1
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starting StorageBackend
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822 } |