Mercurial > hg > orthanc-databases

annotate Framework/Common/DatabaseManager.cpp @ 231:0a9b48d19643

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removed mutex out of DatabaseManager
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 06 Apr 2021 11:59:31 +0200
parents a4918d57435c
children d1b124d116c1
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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 {
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63 transaction_.reset(NULL);
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64 }
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65
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66 if (e == Orthanc::ErrorCode_DatabaseUnavailable)
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67 {
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68 LOG(ERROR) << "The database is not available, closing the connection";
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69 Close();
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70 }
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71 }
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74 IPrecompiledStatement* DatabaseManager::LookupCachedStatement(const StatementLocation& location) const
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75 {
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76 CachedStatements::const_iterator found = cachedStatements_.find(location);
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77
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78 if (found == cachedStatements_.end())
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79 {
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80 return NULL;
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81 }
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82 else
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83 {
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84 assert(found->second != NULL);
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85 return found->second;
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86 }
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87 }
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89
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90 IPrecompiledStatement& DatabaseManager::CacheStatement(const StatementLocation& location,
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91 const Query& query)
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92 {
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93 LOG(TRACE) << "Caching statement from " << location.GetFile() << ":" << location.GetLine();
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94
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95 std::unique_ptr<IPrecompiledStatement> statement(GetDatabase().Compile(query));
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96
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97 IPrecompiledStatement* tmp = statement.get();
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98 if (tmp == NULL)
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99 {
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100 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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101 }
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102
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103 assert(cachedStatements_.find(location) == cachedStatements_.end());
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104 cachedStatements_[location] = statement.release();
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105
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106 return *tmp;
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107 }
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108
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109
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110 ITransaction& DatabaseManager::GetTransaction()
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111 {
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112 if (transaction_.get() == NULL)
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113 {
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114 LOG(TRACE) << "Automatically creating an implicit database transaction";
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115
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116 try
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117 {
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118 transaction_.reset(GetDatabase().CreateTransaction(TransactionType_Implicit));
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119 }
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120 catch (Orthanc::OrthancException& e)
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121 {
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122 CloseIfUnavailable(e.GetErrorCode());
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123 throw;
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124 }
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125 }
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126
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127 assert(transaction_.get() != NULL);
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128 return *transaction_;
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129 }
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130
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131
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132 void DatabaseManager::ReleaseImplicitTransaction()
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133 {
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134 if (transaction_.get() != NULL &&
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135 transaction_->IsImplicit())
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136 {
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137 LOG(TRACE) << "Committing an implicit database transaction";
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138
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139 try
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140 {
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141 transaction_->Commit();
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142 transaction_.reset(NULL);
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143 }
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144 catch (Orthanc::OrthancException& e)
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145 {
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146 // Don't throw the exception, as we are in CachedStatement destructor
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147 LOG(ERROR) << "Error while committing an implicit database transaction: " << e.What();
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148 }
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149 }
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150 }
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151
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152
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153 DatabaseManager::DatabaseManager(IDatabase* database) :
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154 database_(database)
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155 {
226
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156 if (database == NULL)
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157 {
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158 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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159 }
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160
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161 dialect_ = database->GetDialect();
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162 }
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163
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164
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165 void DatabaseManager::StartTransaction(TransactionType type)
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166 {
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167 try
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168 {
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169 if (transaction_.get() != NULL)
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170 {
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171 LOG(ERROR) << "Cannot start another transaction while there is an uncommitted transaction";
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172 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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173 }
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174
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175 transaction_.reset(GetDatabase().CreateTransaction(type));
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176 }
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177 catch (Orthanc::OrthancException& e)
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178 {
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179 CloseIfUnavailable(e.GetErrorCode());
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180 throw;
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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 void DatabaseManager::CommitTransaction()
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186 {
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187 if (transaction_.get() == NULL)
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188 {
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189 LOG(ERROR) << "Cannot commit a non-existing transaction";
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190 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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191 }
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192 else
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193 {
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194 try
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195 {
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196 transaction_->Commit();
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197 transaction_.reset(NULL);
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198 }
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199 catch (Orthanc::OrthancException& e)
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200 {
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201 CloseIfUnavailable(e.GetErrorCode());
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202 throw;
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203 }
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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 void DatabaseManager::RollbackTransaction()
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209 {
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210 if (transaction_.get() == NULL)
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211 {
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212 LOG(ERROR) << "Cannot rollback a non-existing transaction";
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213 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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214 }
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215 else
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216 {
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217 try
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218 {
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219 transaction_->Rollback();
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220 transaction_.reset(NULL);
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221 }
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222 catch (Orthanc::OrthancException& e)
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223 {
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224 CloseIfUnavailable(e.GetErrorCode());
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225 throw;
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226 }
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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 DatabaseManager::Transaction::Transaction(DatabaseManager& manager,
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232 TransactionType type) :
23
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233 manager_(manager),
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234 database_(manager.GetDatabase()),
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235 committed_(false)
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236 {
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237 manager_.StartTransaction(type);
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238 }
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239
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240
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241 DatabaseManager::Transaction::~Transaction()
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242 {
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243 if (!committed_)
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244 {
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245 try
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246 {
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247 manager_.RollbackTransaction();
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248 }
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249 catch (Orthanc::OrthancException& e)
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250 {
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251 // Don't rethrow the exception as we are in a destructor
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252 LOG(ERROR) << "Uncatched error during some transaction rollback: " << e.What();
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253 }
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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 void DatabaseManager::Transaction::Commit()
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259 {
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260 if (committed_)
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261 {
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262 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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263 }
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264 else
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265 {
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266 manager_.CommitTransaction();
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267 committed_ = true;
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268 }
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269 }
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270
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271
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272 IResult& DatabaseManager::StatementBase::GetResult() const
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273 {
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274 if (result_.get() == NULL)
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275 {
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276 LOG(ERROR) << "Accessing the results of a statement without having executed it";
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277 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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278 }
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279
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280 return *result_;
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281 }
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282
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283
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284 void DatabaseManager::StatementBase::SetQuery(Query* query)
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285 {
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286 std::unique_ptr<Query> protection(query);
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287
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288 if (query_.get() != NULL)
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289 {
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290 LOG(ERROR) << "Cannot set twice a query";
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291 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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292 }
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293
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294 if (query == NULL)
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295 {
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296 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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297 }
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298
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299 query_.reset(protection.release());
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300 }
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301
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302
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303 void DatabaseManager::StatementBase::SetResult(IResult* result)
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304 {
157
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305 std::unique_ptr<IResult> protection(result);
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306
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307 if (result_.get() != NULL)
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308 {
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309 LOG(ERROR) << "Cannot execute twice a statement";
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310 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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311 }
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312
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313 if (result == NULL)
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314 {
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315 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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316 }
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317
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318 result_.reset(protection.release());
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319 }
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320
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321
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322 DatabaseManager::StatementBase::StatementBase(DatabaseManager& manager) :
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323 manager_(manager),
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324 transaction_(manager_.GetTransaction())
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325 {
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326 }
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327
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328
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329 DatabaseManager::StatementBase::~StatementBase()
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330 {
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331 manager_.ReleaseImplicitTransaction();
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332 }
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333
23
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334
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335 void DatabaseManager::StatementBase::SetReadOnly(bool readOnly)
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336 {
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337 if (query_.get() != NULL)
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338 {
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339 query_->SetReadOnly(readOnly);
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340 }
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341 }
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342
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343
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344 void DatabaseManager::StatementBase::SetParameterType(const std::string& parameter,
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345 ValueType type)
0
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346 {
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347 if (query_.get() != NULL)
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348 {
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349 query_->SetType(parameter, type);
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350 }
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351 }
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352
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353 bool DatabaseManager::StatementBase::IsDone() const
0
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354 {
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355 try
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356 {
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357 return GetResult().IsDone();
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358 }
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359 catch (Orthanc::OrthancException& e)
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parents:
diff changeset
360 {
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361 manager_.CloseIfUnavailable(e.GetErrorCode());
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362 throw;
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parents:
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363 }
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parents:
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364 }
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parents:
diff changeset
365
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366
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diff changeset
367 void DatabaseManager::StatementBase::Next()
0
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368 {
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369 try
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370 {
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371 GetResult().Next();
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372 }
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373 catch (Orthanc::OrthancException& e)
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374 {
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375 manager_.CloseIfUnavailable(e.GetErrorCode());
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376 throw;
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377 }
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parents:
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378 }
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parents:
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379
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380
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diff changeset
381 size_t DatabaseManager::StatementBase::GetResultFieldsCount() const
0
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382 {
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diff changeset
383 try
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parents:
diff changeset
384 {
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385 return GetResult().GetFieldsCount();
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parents:
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386 }
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387 catch (Orthanc::OrthancException& e)
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parents:
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388 {
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389 manager_.CloseIfUnavailable(e.GetErrorCode());
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390 throw;
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parents:
diff changeset
391 }
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parents:
diff changeset
392 }
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parents:
diff changeset
393
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
394
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diff changeset
395 void DatabaseManager::StatementBase::SetResultFieldType(size_t field,
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diff changeset
396 ValueType type)
0
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parents:
diff changeset
397 {
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
398 try
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parents:
diff changeset
399 {
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parents:
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400 if (!GetResult().IsDone())
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parents:
diff changeset
401 {
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parents:
diff changeset
402 GetResult().SetExpectedType(field, type);
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
403 }
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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 catch (Orthanc::OrthancException& e)
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
406 {
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parents:
diff changeset
407 manager_.CloseIfUnavailable(e.GetErrorCode());
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parents:
diff changeset
408 throw;
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parents:
diff changeset
409 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
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
70
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diff changeset
413 const IValue& DatabaseManager::StatementBase::GetResultField(size_t index) const
0
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parents:
diff changeset
414 {
7cea966b6829 initial commit
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parents:
diff changeset
415 try
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parents:
diff changeset
416 {
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parents:
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417 return GetResult().GetField(index);
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parents:
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418 }
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parents:
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419 catch (Orthanc::OrthancException& e)
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parents:
diff changeset
420 {
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421 manager_.CloseIfUnavailable(e.GetErrorCode());
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parents:
diff changeset
422 throw;
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parents:
diff changeset
423 }
70
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parents: 67
diff changeset
424 }
e6c13ddd26d9 all integration tests passing with LookupResources extension
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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
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diff changeset
427 DatabaseManager::CachedStatement::CachedStatement(const StatementLocation& location,
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diff changeset
428 DatabaseManager& manager,
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
429 const std::string& sql) :
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diff changeset
430 StatementBase(manager),
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diff changeset
431 location_(location)
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parents: 67
diff changeset
432 {
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
433 statement_ = GetManager().LookupCachedStatement(location_);
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parents: 67
diff changeset
434
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
435 if (statement_ == NULL)
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parents: 67
diff changeset
436 {
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
437 SetQuery(new Query(sql));
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
438 }
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parents: 67
diff changeset
439 else
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parents: 67
diff changeset
440 {
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
441 LOG(TRACE) << "Reusing cached statement from "
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
442 << location_.GetFile() << ":" << location_.GetLine();
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parents: 67
diff changeset
443 }
e6c13ddd26d9 all integration tests passing with LookupResources extension
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 67
diff changeset
444 }
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
445
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
446
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diff changeset
447 void DatabaseManager::CachedStatement::Execute(const Dictionary& parameters)
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parents: 67
diff changeset
448 {
e6c13ddd26d9 all integration tests passing with LookupResources extension
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diff changeset
449 try
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450 {
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451 std::unique_ptr<Query> query(ReleaseQuery());
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452
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453 if (query.get() != NULL)
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454 {
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455 // Register the newly-created statement
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456 assert(statement_ == NULL);
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457 statement_ = &GetManager().CacheStatement(location_, *query);
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458 }
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459
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460 assert(statement_ != NULL);
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461
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462 /*
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463 TODO - Sample code to monitor the execution time of each
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464 cached statement, and publish it as an Orthanc metrics
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465
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466 #if HAS_ORTHANC_PLUGIN_METRICS == 1
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467 std::string name = (std::string(location_.GetFile()) + "_" +
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468 boost::lexical_cast<std::string>(location_.GetLine()));
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469 OrthancPlugins::MetricsTimer timer(name.c_str());
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470 #endif
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471 */
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472
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473 SetResult(GetTransaction().Execute(*statement_, parameters));
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474 }
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475 catch (Orthanc::OrthancException& e)
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476 {
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477 GetManager().CloseIfUnavailable(e.GetErrorCode());
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478 throw;
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479 }
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480 }
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481
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482
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483 DatabaseManager::StandaloneStatement::StandaloneStatement(DatabaseManager& manager,
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484 const std::string& sql) :
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485 StatementBase(manager)
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486 {
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487 SetQuery(new Query(sql));
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488 }
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489
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490
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491 DatabaseManager::StandaloneStatement::~StandaloneStatement()
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492 {
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493 // The result must be removed before the statement, cf. (*)
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494 ClearResult();
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495 statement_.reset();
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496 }
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497
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498
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499 void DatabaseManager::StandaloneStatement::Execute(const Dictionary& parameters)
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500 {
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501 try
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502 {
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503 std::unique_ptr<Query> query(ReleaseQuery());
70
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504 assert(query.get() != NULL);
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505
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506 // The "statement_" object must be kept as long as the "IResult"
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507 // is not destroyed, as the "IResult" can make calls to the
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508 // statement (this is the case for SQLite and MySQL) - (*)
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509 statement_.reset(GetManager().GetDatabase().Compile(*query));
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510 assert(statement_.get() != NULL);
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511
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512 SetResult(GetTransaction().Execute(*statement_, parameters));
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513 }
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514 catch (Orthanc::OrthancException& e)
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515 {
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516 GetManager().CloseIfUnavailable(e.GetErrorCode());
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517 throw;
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518 }
0
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519 }
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520 }