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annotate Framework/Plugins/IndexConnectionsPool.cpp @ 405:1938ba8fba35

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 15 Apr 2023 13:49:53 +0200
parents 3d6886f3e5b3
children de6de66d70b2
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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) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Affero General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Affero General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Affero General Public License
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #include "IndexConnectionsPool.h"
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24
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25 namespace OrthancDatabases
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26 {
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27 class IndexConnectionsPool::ManagerReference : public Orthanc::IDynamicObject
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28 {
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29 private:
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30 DatabaseManager* manager_;
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31
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32 public:
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33 explicit ManagerReference(DatabaseManager& manager) :
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34 manager_(&manager)
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35 {
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36 }
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37
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38 DatabaseManager& GetManager()
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39 {
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40 assert(manager_ != NULL);
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41 return *manager_;
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42 }
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43 };
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44
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45
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46 IndexConnectionsPool::IndexConnectionsPool(IndexBackend* backend,
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47 size_t countConnections) :
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48 backend_(backend),
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49 countConnections_(countConnections)
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50 {
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51 if (countConnections == 0)
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52 {
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53 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange,
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54 "There must be a non-zero number of connections to the database");
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55 }
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56 else if (backend == NULL)
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57 {
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58 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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59 }
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60 else
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61 {
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62 context_ = backend_->GetContext();
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63 }
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64 }
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65
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66
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67 IndexConnectionsPool::~IndexConnectionsPool()
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68 {
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69 for (std::list<DatabaseManager*>::iterator
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70 it = connections_.begin(); it != connections_.end(); ++it)
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71 {
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72 assert(*it != NULL);
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73 delete *it;
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74 }
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75 }
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76
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77
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78 void IndexConnectionsPool::OpenConnections()
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79 {
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80 boost::unique_lock<boost::shared_mutex> lock(connectionsMutex_);
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81
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82 if (connections_.size() == 0)
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83 {
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84 assert(backend_.get() != NULL);
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85
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86 {
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87 std::unique_ptr<DatabaseManager> manager(new DatabaseManager(backend_->CreateDatabaseFactory()));
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88 manager->GetDatabase(); // Make sure to open the database connection
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89
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90 backend_->ConfigureDatabase(*manager);
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91 connections_.push_back(manager.release());
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92 }
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93
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94 for (size_t i = 1; i < countConnections_; i++)
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95 {
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96 connections_.push_back(new DatabaseManager(backend_->CreateDatabaseFactory()));
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97 connections_.back()->GetDatabase(); // Make sure to open the database connection
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98 }
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99
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100 for (std::list<DatabaseManager*>::iterator
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101 it = connections_.begin(); it != connections_.end(); ++it)
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102 {
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103 assert(*it != NULL);
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104 availableConnections_.Enqueue(new ManagerReference(**it));
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105 }
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106 }
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107 else
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108 {
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109 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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110 }
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111 }
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112
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113
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114 void IndexConnectionsPool::CloseConnections()
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115 {
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116 boost::unique_lock<boost::shared_mutex> lock(connectionsMutex_);
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117
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118 if (connections_.size() != countConnections_)
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119 {
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120 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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121 }
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122 else if (availableConnections_.GetSize() != countConnections_)
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123 {
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124 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database, "Some connections are still in use, bug in the Orthanc core");
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125 }
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126 else
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127 {
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128 for (std::list<DatabaseManager*>::iterator
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129 it = connections_.begin(); it != connections_.end(); ++it)
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130 {
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131 assert(*it != NULL);
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132 (*it)->Close();
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133 }
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134 }
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135 }
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136
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137
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138 IndexConnectionsPool::Accessor::Accessor(IndexConnectionsPool& pool) :
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139 lock_(pool.connectionsMutex_),
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140 pool_(pool),
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141 manager_(NULL)
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142 {
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143 for (;;)
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144 {
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145 std::unique_ptr<Orthanc::IDynamicObject> manager(pool.availableConnections_.Dequeue(100));
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146 if (manager.get() != NULL)
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147 {
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148 manager_ = &dynamic_cast<ManagerReference&>(*manager).GetManager();
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149 return;
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150 }
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151 }
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152 }
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153
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154
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155 IndexConnectionsPool::Accessor::~Accessor()
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156 {
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157 assert(manager_ != NULL);
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158 pool_.availableConnections_.Enqueue(new ManagerReference(*manager_));
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159 }
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160
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161
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162 IndexBackend& IndexConnectionsPool::Accessor::GetBackend() const
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163 {
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164 return *pool_.backend_;
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165 }
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166
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167
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168 DatabaseManager& IndexConnectionsPool::Accessor::GetManager() const
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169 {
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170 assert(manager_ != NULL);
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171 return *manager_;
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172 }
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173 }