Mercurial > hg > orthanc-databases

annotate Framework/Plugins/IndexConnectionsPool.cpp @ 522:c49136b34891 large-queries tip

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author Alain Mazy <am@orthanc.team>
date Fri, 05 Jul 2024 09:15:54 +0200
parents 54d518dcd74a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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374
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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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ecd0b719cff5 update year to 2024
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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 "IndexConnectionsPool.h"
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25
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26 namespace OrthancDatabases
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27 {
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28 class IndexConnectionsPool::ManagerReference : public Orthanc::IDynamicObject
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29 {
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30 private:
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31 DatabaseManager* manager_;
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32
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33 public:
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34 explicit ManagerReference(DatabaseManager& manager) :
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35 manager_(&manager)
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36 {
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37 }
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38
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39 DatabaseManager& GetManager()
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40 {
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41 assert(manager_ != NULL);
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42 return *manager_;
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43 }
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44 };
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45
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46
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47 IndexConnectionsPool::IndexConnectionsPool(IndexBackend* backend,
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48 size_t countConnections) :
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49 backend_(backend),
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50 countConnections_(countConnections)
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51 {
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52 if (countConnections == 0)
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53 {
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54 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange,
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55 "There must be a non-zero number of connections to the database");
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56 }
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57 else if (backend == NULL)
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58 {
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59 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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60 }
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61 else
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62 {
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63 context_ = backend_->GetContext();
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64 }
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65 }
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66
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67
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68 IndexConnectionsPool::~IndexConnectionsPool()
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69 {
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70 for (std::list<DatabaseManager*>::iterator
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71 it = connections_.begin(); it != connections_.end(); ++it)
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72 {
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73 assert(*it != NULL);
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74 delete *it;
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75 }
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76 }
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77
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78
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79 void IndexConnectionsPool::OpenConnections(bool hasIdentifierTags,
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80 const std::list<IdentifierTag>& identifierTags)
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81 {
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82 boost::unique_lock<boost::shared_mutex> lock(connectionsMutex_);
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83
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84 if (connections_.size() == 0)
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85 {
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86 assert(backend_.get() != NULL);
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87
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88 {
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89 std::unique_ptr<DatabaseManager> manager(new DatabaseManager(backend_->CreateDatabaseFactory()));
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90 manager->GetDatabase(); // Make sure to open the database connection
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91
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92 backend_->ConfigureDatabase(*manager, hasIdentifierTags, identifierTags);
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93 connections_.push_back(manager.release());
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94 }
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95
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96 for (size_t i = 1; i < countConnections_; i++)
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97 {
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98 connections_.push_back(new DatabaseManager(backend_->CreateDatabaseFactory()));
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99 connections_.back()->GetDatabase(); // Make sure to open the database connection
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100 }
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101
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102 for (std::list<DatabaseManager*>::iterator
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103 it = connections_.begin(); it != connections_.end(); ++it)
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104 {
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105 assert(*it != NULL);
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106 availableConnections_.Enqueue(new ManagerReference(**it));
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107 }
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108 }
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109 else
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110 {
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111 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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112 }
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113 }
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114
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115
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116 void IndexConnectionsPool::CloseConnections()
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117 {
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118 boost::unique_lock<boost::shared_mutex> lock(connectionsMutex_);
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119
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120 if (connections_.size() != countConnections_)
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121 {
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122 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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123 }
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124 else if (availableConnections_.GetSize() != countConnections_)
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125 {
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126 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database, "Some connections are still in use, bug in the Orthanc core");
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127 }
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128 else
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129 {
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130 for (std::list<DatabaseManager*>::iterator
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131 it = connections_.begin(); it != connections_.end(); ++it)
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132 {
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133 assert(*it != NULL);
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134 (*it)->Close();
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135 }
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136 }
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137 }
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138
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139
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140 IndexConnectionsPool::Accessor::Accessor(IndexConnectionsPool& pool) :
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141 lock_(pool.connectionsMutex_),
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142 pool_(pool),
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143 manager_(NULL)
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144 {
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145 for (;;)
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146 {
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147 std::unique_ptr<Orthanc::IDynamicObject> manager(pool.availableConnections_.Dequeue(100));
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148 if (manager.get() != NULL)
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149 {
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150 manager_ = &dynamic_cast<ManagerReference&>(*manager).GetManager();
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151 return;
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152 }
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153 }
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154 }
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155
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156
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157 IndexConnectionsPool::Accessor::~Accessor()
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158 {
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159 assert(manager_ != NULL);
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160 pool_.availableConnections_.Enqueue(new ManagerReference(*manager_));
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161 }
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162
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163
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164 IndexBackend& IndexConnectionsPool::Accessor::GetBackend() const
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165 {
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166 return *pool_.backend_;
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167 }
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168
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169
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170 DatabaseManager& IndexConnectionsPool::Accessor::GetManager() const
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171 {
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172 assert(manager_ != NULL);
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173 return *manager_;
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174 }
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175 }