Mercurial > hg > orthanc-databases
annotate MySQL/Plugins/MySQLStorageArea.cpp @ 305:87f0e29a1dc1
added Dictionary::Clear()
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 12 Jul 2021 09:40:01 +0200 |
| parents | 567761f0c1ea |
| children | 16aac0287485 |
| rev | line source |
|---|---|
| 17 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
|
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium |
| 17 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "MySQLStorageArea.h" | |
| 23 | |
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24 #include "../../Framework/Common/BinaryStringValue.h" |
| 17 | 25 #include "../../Framework/MySQL/MySQLDatabase.h" |
| 26 #include "../../Framework/MySQL/MySQLTransaction.h" | |
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27 #include "MySQLDefinitions.h" |
| 17 | 28 |
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29 #include <Compatibility.h> // For std::unique_ptr<> |
| 152 | 30 #include <Logging.h> |
| 17 | 31 |
| 32 #include <boost/math/special_functions/round.hpp> | |
| 33 | |
| 34 | |
| 35 namespace OrthancDatabases | |
| 36 { | |
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37 void MySQLStorageArea::ConfigureDatabase(MySQLDatabase& db, |
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38 const MySQLParameters& parameters, |
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39 bool clearAll) |
| 17 | 40 { |
| 41 { | |
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42 MySQLDatabase::TransientAdvisoryLock lock(db, MYSQL_LOCK_DATABASE_SETUP); |
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43 MySQLTransaction t(db, TransactionType_ReadWrite); |
| 17 | 44 |
| 45 int64_t size; | |
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46 if (db.LookupGlobalIntegerVariable(size, "max_allowed_packet")) |
| 17 | 47 { |
| 48 int mb = boost::math::iround(static_cast<double>(size) / | |
| 49 static_cast<double>(1024 * 1024)); | |
| 50 LOG(WARNING) << "Your MySQL server cannot " | |
| 51 << "store DICOM files larger than " << mb << "MB"; | |
| 52 LOG(WARNING) << " => Consider increasing \"max_allowed_packet\" " | |
| 53 << "in \"my.cnf\" if this limit is insufficient for your use"; | |
| 54 } | |
| 55 else | |
| 56 { | |
| 57 LOG(WARNING) << "Unable to auto-detect the maximum size of DICOM " | |
| 58 << "files that can be stored in this MySQL server"; | |
| 59 } | |
| 60 | |
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61 if (clearAll) |
| 17 | 62 { |
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63 db.ExecuteMultiLines("DROP TABLE IF EXISTS StorageArea", false); |
| 17 | 64 } |
| 65 | |
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66 db.ExecuteMultiLines("CREATE TABLE IF NOT EXISTS StorageArea(" |
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67 "uuid VARCHAR(64) NOT NULL PRIMARY KEY," |
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68 "content LONGBLOB NOT NULL," |
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69 "type INTEGER NOT NULL)", false); |
| 17 | 70 |
| 71 t.Commit(); | |
| 72 } | |
| 73 | |
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74 /** |
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75 * WARNING: This lock must be acquired after |
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76 * "MYSQL_LOCK_DATABASE_SETUP" is released. Indeed, in MySQL < |
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77 * 5.7, it is impossible to acquire more than one lock at a time, |
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78 * as calling "SELECT GET_LOCK()" releases all the |
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79 * previously-acquired locks. |
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80 * https://dev.mysql.com/doc/refman/5.7/en/locking-functions.html |
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81 **/ |
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82 if (parameters.HasLock()) |
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83 { |
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84 db.AdvisoryLock(MYSQL_LOCK_STORAGE); |
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85 } |
| 17 | 86 } |
| 87 | |
| 88 | |
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89 MySQLStorageArea::MySQLStorageArea(const MySQLParameters& parameters, |
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90 bool clearAll) : |
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91 StorageBackend(MySQLDatabase::CreateDatabaseFactory(parameters), |
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92 parameters.GetMaxConnectionRetries()) |
| 17 | 93 { |
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94 { |
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95 AccessorBase accessor(*this); |
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96 MySQLDatabase& database = dynamic_cast<MySQLDatabase&>(accessor.GetManager().GetDatabase()); |
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97 ConfigureDatabase(database, parameters, clearAll); |
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98 } |
| 17 | 99 } |
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100 |
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101 |
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102 class MySQLStorageArea::Accessor : public StorageBackend::AccessorBase |
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103 { |
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104 public: |
| 252 | 105 explicit Accessor(MySQLStorageArea& backend) : |
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106 AccessorBase(backend) |
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107 { |
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108 } |
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109 |
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110 virtual void ReadRange(IFileContentVisitor& visitor, |
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111 const std::string& uuid, |
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112 OrthancPluginContentType type, |
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113 uint64_t start, |
| 250 | 114 size_t length) ORTHANC_OVERRIDE |
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115 { |
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116 DatabaseManager::Transaction transaction(GetManager(), TransactionType_ReadOnly); |
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117 |
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118 { |
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119 // https://stackoverflow.com/a/6545557/881731 |
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120 DatabaseManager::CachedStatement statement( |
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121 STATEMENT_FROM_HERE, GetManager(), |
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122 "SELECT SUBSTRING(content, ${start}, ${length}) FROM StorageArea WHERE uuid=${uuid} AND type=${type}"); |
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123 |
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124 statement.SetParameterType("uuid", ValueType_Utf8String); |
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125 statement.SetParameterType("type", ValueType_Integer64); |
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126 statement.SetParameterType("start", ValueType_Integer64); |
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127 statement.SetParameterType("length", ValueType_Integer64); |
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128 |
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129 Dictionary args; |
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130 args.SetUtf8Value("uuid", uuid); |
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131 args.SetIntegerValue("type", type); |
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132 args.SetIntegerValue("length", length); |
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133 |
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134 /** |
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135 * "For all forms of SUBSTRING(), the position of the first |
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136 * character in the string from which the substring is to be |
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137 * extracted is reckoned as 1." => hence the "+ 1" |
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138 * https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_substring |
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139 **/ |
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140 args.SetIntegerValue("start", start + 1); |
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141 |
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142 statement.Execute(args); |
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143 |
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144 if (statement.IsDone()) |
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145 { |
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146 throw Orthanc::OrthancException(Orthanc::ErrorCode_UnknownResource); |
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147 } |
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148 else if (statement.GetResultFieldsCount() != 1) |
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149 { |
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150 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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151 } |
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152 else |
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153 { |
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154 const IValue& value = statement.GetResultField(0); |
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155 |
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156 if (value.GetType() == ValueType_BinaryString) |
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157 { |
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158 const std::string& content = dynamic_cast<const BinaryStringValue&>(value).GetContent(); |
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159 |
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160 if (static_cast<uint64_t>(content.size()) == length) |
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161 { |
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162 visitor.Assign(content); |
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163 } |
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164 else |
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165 { |
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166 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadRange); |
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167 } |
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168 } |
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169 else |
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170 { |
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171 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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172 } |
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173 } |
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174 } |
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175 |
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176 transaction.Commit(); |
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177 |
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178 if (!visitor.IsSuccess()) |
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179 { |
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180 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database, "Could not read range from the storage area"); |
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181 } |
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182 } |
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183 }; |
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184 |
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185 |
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186 StorageBackend::IAccessor* MySQLStorageArea::CreateAccessor() |
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187 { |
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188 return new Accessor(*this); |
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189 } |
| 17 | 190 } |