Mercurial > hg > orthanc-databases

annotate Framework/Common/DatabaseManager.cpp @ 234:d1b124d116c1

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PostgreSQL index plugin handles retries for collisions between multiple writers
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 08 Apr 2021 10:50:01 +0200
parents 0a9b48d19643
children f2b32d31fc99
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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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3236894320d6 upgrade to year 2021
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "DatabaseManager.h"
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23
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24 #include "../../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h"
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25
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26 #include <Compatibility.h> // For std::unique_ptr<>
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27 #include <Logging.h>
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28 #include <OrthancException.h>
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29
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30 #include <boost/thread.hpp>
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31
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32 namespace OrthancDatabases
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33 {
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34 void DatabaseManager::Close()
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35 {
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36 LOG(TRACE) << "Closing the connection to the database";
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37
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38 // Rollback active transaction, if any
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39 transaction_.reset(NULL);
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40
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41 // Delete all the cached statements (must occur before closing
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42 // the database)
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43 for (CachedStatements::iterator it = cachedStatements_.begin();
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44 it != cachedStatements_.end(); ++it)
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45 {
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46 assert(it->second != NULL);
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47 delete it->second;
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48 }
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49
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50 cachedStatements_.clear();
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51
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52 // Close the database
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53 database_.reset(NULL);
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54
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55 LOG(TRACE) << "Connection to the database is closed";
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56 }
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57
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58
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59 void DatabaseManager::CloseIfUnavailable(Orthanc::ErrorCode e)
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60 {
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61 if (e != Orthanc::ErrorCode_Success &&
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62 e != Orthanc::ErrorCode_DatabaseCannotSerialize)
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63 {
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64 transaction_.reset(NULL);
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65 }
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66
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67 if (e == Orthanc::ErrorCode_DatabaseUnavailable)
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68 {
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69 LOG(ERROR) << "The database is not available, closing the connection";
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70 Close();
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71 }
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72 }
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75 IPrecompiledStatement* DatabaseManager::LookupCachedStatement(const StatementLocation& location) const
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76 {
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77 CachedStatements::const_iterator found = cachedStatements_.find(location);
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78
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79 if (found == cachedStatements_.end())
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80 {
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81 return NULL;
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82 }
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83 else
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84 {
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85 assert(found->second != NULL);
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86 return found->second;
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87 }
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88 }
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91 IPrecompiledStatement& DatabaseManager::CacheStatement(const StatementLocation& location,
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92 const Query& query)
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93 {
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94 LOG(TRACE) << "Caching statement from " << location.GetFile() << ":" << location.GetLine();
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95
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96 std::unique_ptr<IPrecompiledStatement> statement(GetDatabase().Compile(query));
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97
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98 IPrecompiledStatement* tmp = statement.get();
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99 if (tmp == NULL)
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100 {
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101 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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102 }
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103
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104 assert(cachedStatements_.find(location) == cachedStatements_.end());
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105 cachedStatements_[location] = statement.release();
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106
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107 return *tmp;
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108 }
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109
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110
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111 ITransaction& DatabaseManager::GetTransaction()
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112 {
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113 if (transaction_.get() == NULL)
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114 {
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115 LOG(TRACE) << "Automatically creating an implicit database transaction";
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116
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117 try
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118 {
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119 transaction_.reset(GetDatabase().CreateTransaction(TransactionType_Implicit));
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120 }
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121 catch (Orthanc::OrthancException& e)
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122 {
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123 CloseIfUnavailable(e.GetErrorCode());
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124 throw;
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125 }
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126 }
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127
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128 assert(transaction_.get() != NULL);
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129 return *transaction_;
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130 }
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131
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132
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133 void DatabaseManager::ReleaseImplicitTransaction()
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134 {
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135 if (transaction_.get() != NULL &&
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136 transaction_->IsImplicit())
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137 {
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138 LOG(TRACE) << "Committing an implicit database transaction";
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139
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140 try
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141 {
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142 transaction_->Commit();
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143 transaction_.reset(NULL);
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144 }
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145 catch (Orthanc::OrthancException& e)
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146 {
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147 // Don't throw the exception, as we are in CachedStatement destructor
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148 LOG(ERROR) << "Error while committing an implicit database transaction: " << e.What();
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149 }
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150 }
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151 }
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152
0
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153
226
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154 DatabaseManager::DatabaseManager(IDatabase* database) :
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155 database_(database)
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156 {
226
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157 if (database == NULL)
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158 {
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159 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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160 }
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161
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162 dialect_ = database->GetDialect();
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163 }
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164
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165
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166 void DatabaseManager::StartTransaction(TransactionType type)
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167 {
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168 try
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169 {
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170 if (transaction_.get() != NULL)
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171 {
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172 LOG(ERROR) << "Cannot start another transaction while there is an uncommitted transaction";
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173 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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174 }
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175
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176 transaction_.reset(GetDatabase().CreateTransaction(type));
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177 }
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178 catch (Orthanc::OrthancException& e)
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179 {
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180 CloseIfUnavailable(e.GetErrorCode());
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181 throw;
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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 void DatabaseManager::CommitTransaction()
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187 {
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188 if (transaction_.get() == NULL)
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189 {
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190 LOG(ERROR) << "Cannot commit a non-existing transaction";
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191 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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192 }
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193 else
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194 {
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195 try
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196 {
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197 transaction_->Commit();
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198 transaction_.reset(NULL);
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199 }
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200 catch (Orthanc::OrthancException& e)
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201 {
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202 CloseIfUnavailable(e.GetErrorCode());
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203 throw;
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204 }
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205 }
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206 }
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207
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208
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209 void DatabaseManager::RollbackTransaction()
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210 {
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211 if (transaction_.get() == NULL)
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212 {
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213 LOG(INFO) << "Cannot rollback a non-existing transaction";
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214 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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215 }
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216 else
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217 {
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218 try
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219 {
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220 transaction_->Rollback();
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221 transaction_.reset(NULL);
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222 }
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223 catch (Orthanc::OrthancException& e)
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224 {
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225 CloseIfUnavailable(e.GetErrorCode());
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226 throw;
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227 }
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228 }
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229 }
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230
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231
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232 DatabaseManager::Transaction::Transaction(DatabaseManager& manager,
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233 TransactionType type) :
23
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234 manager_(manager),
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235 database_(manager.GetDatabase()),
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236 committed_(false)
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237 {
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238 manager_.StartTransaction(type);
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239 }
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240
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241
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242 DatabaseManager::Transaction::~Transaction()
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243 {
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244 if (!committed_)
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245 {
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246 try
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247 {
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248 manager_.RollbackTransaction();
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249 }
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250 catch (Orthanc::OrthancException& e)
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251 {
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252 // Don't rethrow the exception as we are in a destructor
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253 LOG(ERROR) << "Uncatched error during some transaction rollback: " << e.What();
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254 }
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255 }
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256 }
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257
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258
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259 void DatabaseManager::Transaction::Commit()
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260 {
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261 if (committed_)
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262 {
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263 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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264 }
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265 else
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266 {
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267 manager_.CommitTransaction();
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268 committed_ = true;
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269 }
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270 }
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271
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272
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273 IResult& DatabaseManager::StatementBase::GetResult() const
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274 {
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275 if (result_.get() == NULL)
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276 {
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277 LOG(ERROR) << "Accessing the results of a statement without having executed it";
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278 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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279 }
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280
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281 return *result_;
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282 }
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283
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284
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285 void DatabaseManager::StatementBase::SetQuery(Query* query)
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286 {
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287 std::unique_ptr<Query> protection(query);
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288
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289 if (query_.get() != NULL)
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290 {
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291 LOG(ERROR) << "Cannot set twice a query";
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292 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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293 }
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294
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295 if (query == NULL)
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296 {
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297 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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298 }
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299
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300 query_.reset(protection.release());
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301 }
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302
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303
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304 void DatabaseManager::StatementBase::SetResult(IResult* result)
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305 {
157
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306 std::unique_ptr<IResult> protection(result);
70
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307
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308 if (result_.get() != NULL)
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309 {
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310 LOG(ERROR) << "Cannot execute twice a statement";
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311 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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312 }
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313
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314 if (result == NULL)
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315 {
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316 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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317 }
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318
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319 result_.reset(protection.release());
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320 }
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321
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322
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323 DatabaseManager::StatementBase::StatementBase(DatabaseManager& manager) :
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324 manager_(manager),
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325 transaction_(manager_.GetTransaction())
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326 {
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327 }
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328
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329
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330 DatabaseManager::StatementBase::~StatementBase()
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331 {
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332 manager_.ReleaseImplicitTransaction();
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333 }
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diff changeset
334
23
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diff changeset
335
70
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336 void DatabaseManager::StatementBase::SetReadOnly(bool readOnly)
0
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337 {
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338 if (query_.get() != NULL)
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339 {
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340 query_->SetReadOnly(readOnly);
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341 }
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342 }
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343
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344
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345 void DatabaseManager::StatementBase::SetParameterType(const std::string& parameter,
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346 ValueType type)
0
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347 {
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348 if (query_.get() != NULL)
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349 {
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350 query_->SetType(parameter, type);
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351 }
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352 }
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353
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354 bool DatabaseManager::StatementBase::IsDone() const
0
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355 {
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356 try
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parents:
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357 {
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358 return GetResult().IsDone();
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359 }
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360 catch (Orthanc::OrthancException& e)
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parents:
diff changeset
361 {
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362 manager_.CloseIfUnavailable(e.GetErrorCode());
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363 throw;
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parents:
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364 }
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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365 }
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parents:
diff changeset
366
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367
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diff changeset
368 void DatabaseManager::StatementBase::Next()
0
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369 {
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370 try
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parents:
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371 {
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372 GetResult().Next();
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373 }
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parents:
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374 catch (Orthanc::OrthancException& e)
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375 {
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376 manager_.CloseIfUnavailable(e.GetErrorCode());
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377 throw;
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parents:
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378 }
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parents:
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379 }
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parents:
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380
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381
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diff changeset
382 size_t DatabaseManager::StatementBase::GetResultFieldsCount() const
0
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383 {
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parents:
diff changeset
384 try
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parents:
diff changeset
385 {
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386 return GetResult().GetFieldsCount();
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parents:
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387 }
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parents:
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388 catch (Orthanc::OrthancException& e)
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parents:
diff changeset
389 {
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diff changeset
390 manager_.CloseIfUnavailable(e.GetErrorCode());
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parents:
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391 throw;
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parents:
diff changeset
392 }
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
393 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
394
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
395
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diff changeset
396 void DatabaseManager::StatementBase::SetResultFieldType(size_t field,
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diff changeset
397 ValueType type)
0
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parents:
diff changeset
398 {
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
399 try
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
400 {
7cea966b6829 initial commit
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parents:
diff changeset
401 if (!GetResult().IsDone())
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parents:
diff changeset
402 {
7cea966b6829 initial commit
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parents:
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403 GetResult().SetExpectedType(field, type);
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
404 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
405 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
406 catch (Orthanc::OrthancException& e)
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
407 {
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parents:
diff changeset
408 manager_.CloseIfUnavailable(e.GetErrorCode());
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
409 throw;
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parents:
diff changeset
410 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
411 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
412
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
413
70
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diff changeset
414 const IValue& DatabaseManager::StatementBase::GetResultField(size_t index) const
0
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parents:
diff changeset
415 {
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
416 try
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
417 {
7cea966b6829 initial commit
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parents:
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418 return GetResult().GetField(index);
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parents:
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419 }
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
420 catch (Orthanc::OrthancException& e)
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
421 {
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parents:
diff changeset
422 manager_.CloseIfUnavailable(e.GetErrorCode());
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parents:
diff changeset
423 throw;
7cea966b6829 initial commit
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parents:
diff changeset
424 }
70
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parents: 67
diff changeset
425 }
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
426
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
427
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diff changeset
428 DatabaseManager::CachedStatement::CachedStatement(const StatementLocation& location,
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diff changeset
429 DatabaseManager& manager,
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
430 const std::string& sql) :
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diff changeset
431 StatementBase(manager),
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
432 location_(location)
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
433 {
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
434 statement_ = GetManager().LookupCachedStatement(location_);
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
435
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
436 if (statement_ == NULL)
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
437 {
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
438 SetQuery(new Query(sql));
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
439 }
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
440 else
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
441 {
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
442 LOG(TRACE) << "Reusing cached statement from "
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
443 << location_.GetFile() << ":" << location_.GetLine();
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
444 }
e6c13ddd26d9 all integration tests passing with LookupResources extension
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 67
diff changeset
445 }
e6c13ddd26d9 all integration tests passing with LookupResources extension
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 67
diff changeset
446
e6c13ddd26d9 all integration tests passing with LookupResources extension
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 67
diff changeset
447
e6c13ddd26d9 all integration tests passing with LookupResources extension
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448 void DatabaseManager::CachedStatement::Execute(const Dictionary& parameters)
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449 {
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450 try
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451 {
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452 std::unique_ptr<Query> query(ReleaseQuery());
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453
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454 if (query.get() != NULL)
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455 {
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456 // Register the newly-created statement
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457 assert(statement_ == NULL);
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458 statement_ = &GetManager().CacheStatement(location_, *query);
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459 }
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460
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461 assert(statement_ != NULL);
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462
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463 /*
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464 TODO - Sample code to monitor the execution time of each
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465 cached statement, and publish it as an Orthanc metrics
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466
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467 #if HAS_ORTHANC_PLUGIN_METRICS == 1
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468 std::string name = (std::string(location_.GetFile()) + "_" +
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469 boost::lexical_cast<std::string>(location_.GetLine()));
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470 OrthancPlugins::MetricsTimer timer(name.c_str());
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471 #endif
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472 */
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473
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474 SetResult(GetTransaction().Execute(*statement_, parameters));
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475 }
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476 catch (Orthanc::OrthancException& e)
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477 {
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478 GetManager().CloseIfUnavailable(e.GetErrorCode());
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479 throw;
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480 }
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481 }
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482
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483
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484 DatabaseManager::StandaloneStatement::StandaloneStatement(DatabaseManager& manager,
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485 const std::string& sql) :
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486 StatementBase(manager)
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487 {
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488 SetQuery(new Query(sql));
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489 }
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490
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491
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492 DatabaseManager::StandaloneStatement::~StandaloneStatement()
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493 {
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494 // The result must be removed before the statement, cf. (*)
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495 ClearResult();
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496 statement_.reset();
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497 }
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498
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499
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500 void DatabaseManager::StandaloneStatement::Execute(const Dictionary& parameters)
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501 {
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502 try
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503 {
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504 std::unique_ptr<Query> query(ReleaseQuery());
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505 assert(query.get() != NULL);
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506
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507 // The "statement_" object must be kept as long as the "IResult"
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508 // is not destroyed, as the "IResult" can make calls to the
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509 // statement (this is the case for SQLite and MySQL) - (*)
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510 statement_.reset(GetManager().GetDatabase().Compile(*query));
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511 assert(statement_.get() != NULL);
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512
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513 SetResult(GetTransaction().Execute(*statement_, parameters));
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514 }
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515 catch (Orthanc::OrthancException& e)
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516 {
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517 GetManager().CloseIfUnavailable(e.GetErrorCode());
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518 throw;
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519 }
0
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520 }
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521 }