Mercurial > hg > orthanc-databases

annotate Framework/Common/DatabaseManager.cpp @ 254:8a4ce70f456a

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fix crash if connection to server is lost
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 14 Apr 2021 15:33:57 +0200
parents b97a537f4613
children d663d9e44f8d
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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 bool failure;
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62
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63 #if ORTHANC_PLUGINS_VERSION_IS_ABOVE(1, 9, 2)
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64 failure = (e != Orthanc::ErrorCode_Success &&
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65 e != Orthanc::ErrorCode_DatabaseCannotSerialize);
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66 #else
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67 failure = (e != Orthanc::ErrorCode_Success);
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68 #endif
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69
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70 if (failure)
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71 {
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72 transaction_.reset(NULL);
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73 }
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74
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75 if (e == Orthanc::ErrorCode_DatabaseUnavailable)
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76 {
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77 LOG(ERROR) << "The database is not available, closing the connection";
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78 Close();
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79 }
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80 }
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81
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82
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83 IPrecompiledStatement* DatabaseManager::LookupCachedStatement(const StatementLocation& location) const
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84 {
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85 CachedStatements::const_iterator found = cachedStatements_.find(location);
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86
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87 if (found == cachedStatements_.end())
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88 {
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89 return NULL;
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90 }
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91 else
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92 {
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93 assert(found->second != NULL);
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94 return found->second;
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95 }
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96 }
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98
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99 IPrecompiledStatement& DatabaseManager::CacheStatement(const StatementLocation& location,
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100 const Query& query)
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101 {
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102 LOG(TRACE) << "Caching statement from " << location.GetFile() << ":" << location.GetLine();
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103
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104 std::unique_ptr<IPrecompiledStatement> statement(GetDatabase().Compile(query));
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105
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106 IPrecompiledStatement* tmp = statement.get();
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107 if (tmp == NULL)
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108 {
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109 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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110 }
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111
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112 assert(cachedStatements_.find(location) == cachedStatements_.end());
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113 cachedStatements_[location] = statement.release();
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114
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115 return *tmp;
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116 }
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117
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118
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119 ITransaction& DatabaseManager::GetTransaction()
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120 {
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121 if (transaction_.get() == NULL)
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122 {
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123 LOG(TRACE) << "Automatically creating an implicit database transaction";
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124
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125 try
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126 {
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127 transaction_.reset(GetDatabase().CreateTransaction(TransactionType_Implicit));
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128 }
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129 catch (Orthanc::OrthancException& e)
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130 {
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131 CloseIfUnavailable(e.GetErrorCode());
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132 throw;
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133 }
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134 }
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135
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136 assert(transaction_.get() != NULL);
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137 return *transaction_;
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138 }
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139
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140
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141 void DatabaseManager::ReleaseImplicitTransaction()
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142 {
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143 if (transaction_.get() != NULL &&
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144 transaction_->IsImplicit())
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145 {
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146 LOG(TRACE) << "Committing an implicit database transaction";
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147
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148 try
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149 {
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150 transaction_->Commit();
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151 transaction_.reset(NULL);
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152 }
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153 catch (Orthanc::OrthancException& e)
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154 {
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155 // Don't throw the exception, as we are in CachedStatement destructor
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156 LOG(ERROR) << "Error while committing an implicit database transaction: " << e.What();
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157 }
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158 }
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159 }
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160
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161
226
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162 DatabaseManager::DatabaseManager(IDatabase* database) :
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163 database_(database)
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164 {
226
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165 if (database == NULL)
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166 {
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167 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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168 }
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169
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170 dialect_ = database->GetDialect();
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171 }
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172
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173
254
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174 IDatabase& DatabaseManager::GetDatabase()
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175 {
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176 if (database_.get() == NULL)
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177 {
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178 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable);
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179 }
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180 else
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181 {
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182 return *database_;
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183 }
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184 }
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185
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186
207
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187 void DatabaseManager::StartTransaction(TransactionType type)
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188 {
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189 try
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190 {
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191 if (transaction_.get() != NULL)
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192 {
23
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193 LOG(ERROR) << "Cannot start another transaction while there is an uncommitted transaction";
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194 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
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195 }
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196
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197 transaction_.reset(GetDatabase().CreateTransaction(type));
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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 void DatabaseManager::CommitTransaction()
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208 {
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209 if (transaction_.get() == NULL)
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210 {
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211 LOG(ERROR) << "Cannot commit a non-existing transaction";
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212 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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213 }
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214 else
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215 {
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216 try
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217 {
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218 transaction_->Commit();
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219 transaction_.reset(NULL);
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220 }
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221 catch (Orthanc::OrthancException& e)
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222 {
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223 CloseIfUnavailable(e.GetErrorCode());
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224 throw;
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225 }
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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 void DatabaseManager::RollbackTransaction()
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231 {
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232 if (transaction_.get() == NULL)
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233 {
234
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234 LOG(INFO) << "Cannot rollback a non-existing transaction";
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235 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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236 }
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237 else
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238 {
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239 try
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240 {
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241 transaction_->Rollback();
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242 transaction_.reset(NULL);
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243 }
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244 catch (Orthanc::OrthancException& e)
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245 {
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246 CloseIfUnavailable(e.GetErrorCode());
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247 throw;
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248 }
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249 }
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250 }
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251
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252
207
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253 DatabaseManager::Transaction::Transaction(DatabaseManager& manager,
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254 TransactionType type) :
23
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255 manager_(manager),
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256 database_(manager.GetDatabase()),
241
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257 active_(true)
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258 {
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259 manager_.StartTransaction(type);
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260 }
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261
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262
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263 DatabaseManager::Transaction::~Transaction()
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264 {
241
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265 if (active_)
23
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266 {
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267 try
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268 {
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269 manager_.RollbackTransaction();
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270 }
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271 catch (Orthanc::OrthancException& e)
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272 {
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273 // Don't rethrow the exception as we are in a destructor
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274 LOG(ERROR) << "Uncatched error during some transaction rollback: " << e.What();
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275 }
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276 }
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277 }
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278
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279
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280 void DatabaseManager::Transaction::Commit()
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281 {
241
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282 if (active_)
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283 {
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284 manager_.CommitTransaction();
242
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285 active_ = false;
241
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286 }
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287 else
23
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288 {
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289 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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290 }
241
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291 }
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292
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293
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294 void DatabaseManager::Transaction::Rollback()
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295 {
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296 if (active_)
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297 {
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298 manager_.RollbackTransaction();
242
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diff changeset
299 active_ = false;
241
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300 }
23
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diff changeset
301 else
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302 {
241
a063bbf10a3e simplification of class DatabaseManager::Transaction
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diff changeset
303 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
23
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304 }
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305 }
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parents: 18
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306
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307
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diff changeset
308 IResult& DatabaseManager::StatementBase::GetResult() const
12
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309 {
70
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diff changeset
310 if (result_.get() == NULL)
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311 {
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diff changeset
312 LOG(ERROR) << "Accessing the results of a statement without having executed it";
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313 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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314 }
12
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315
70
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diff changeset
316 return *result_;
12
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diff changeset
317 }
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parents: 0
diff changeset
318
23
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diff changeset
319
70
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diff changeset
320 void DatabaseManager::StatementBase::SetQuery(Query* query)
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321 {
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322 std::unique_ptr<Query> protection(query);
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323
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324 if (query_.get() != NULL)
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325 {
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diff changeset
326 LOG(ERROR) << "Cannot set twice a query";
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327 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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328 }
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329
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330 if (query == NULL)
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331 {
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332 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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333 }
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334
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335 query_.reset(protection.release());
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336 }
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337
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338
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339 void DatabaseManager::StatementBase::SetResult(IResult* result)
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340 {
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341 std::unique_ptr<IResult> protection(result);
70
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diff changeset
342
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343 if (result_.get() != NULL)
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344 {
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345 LOG(ERROR) << "Cannot execute twice a statement";
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346 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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347 }
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348
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349 if (result == NULL)
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diff changeset
350 {
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351 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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diff changeset
352 }
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diff changeset
353
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diff changeset
354 result_.reset(protection.release());
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355 }
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diff changeset
356
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diff changeset
357
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diff changeset
358 DatabaseManager::StatementBase::StatementBase(DatabaseManager& manager) :
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359 manager_(manager),
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diff changeset
360 transaction_(manager_.GetTransaction())
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diff changeset
361 {
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parents: 67
diff changeset
362 }
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parents: 67
diff changeset
363
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parents: 67
diff changeset
364
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diff changeset
365 DatabaseManager::StatementBase::~StatementBase()
23
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diff changeset
366 {
b2ff1cd2907a handling of implicit transactions in DatabaseManager
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diff changeset
367 manager_.ReleaseImplicitTransaction();
b2ff1cd2907a handling of implicit transactions in DatabaseManager
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diff changeset
368 }
70
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diff changeset
369
23
b2ff1cd2907a handling of implicit transactions in DatabaseManager
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parents: 18
diff changeset
370
70
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diff changeset
371 void DatabaseManager::StatementBase::SetReadOnly(bool readOnly)
0
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parents:
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372 {
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373 if (query_.get() != NULL)
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parents:
diff changeset
374 {
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diff changeset
375 query_->SetReadOnly(readOnly);
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parents:
diff changeset
376 }
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parents:
diff changeset
377 }
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parents:
diff changeset
378
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parents:
diff changeset
379
70
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diff changeset
380 void DatabaseManager::StatementBase::SetParameterType(const std::string& parameter,
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diff changeset
381 ValueType type)
0
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parents:
diff changeset
382 {
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diff changeset
383 if (query_.get() != NULL)
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parents:
diff changeset
384 {
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diff changeset
385 query_->SetType(parameter, type);
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parents:
diff changeset
386 }
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parents:
diff changeset
387 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
388
70
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diff changeset
389 bool DatabaseManager::StatementBase::IsDone() const
0
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parents:
diff changeset
390 {
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parents:
diff changeset
391 try
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parents:
diff changeset
392 {
7cea966b6829 initial commit
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parents:
diff changeset
393 return GetResult().IsDone();
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parents:
diff changeset
394 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
395 catch (Orthanc::OrthancException& e)
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
396 {
7cea966b6829 initial commit
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diff changeset
397 manager_.CloseIfUnavailable(e.GetErrorCode());
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parents:
diff changeset
398 throw;
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parents:
diff changeset
399 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
400 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
401
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
402
70
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
403 void DatabaseManager::StatementBase::Next()
0
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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 try
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
406 {
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
407 GetResult().Next();
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
408 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
409 catch (Orthanc::OrthancException& e)
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 manager_.CloseIfUnavailable(e.GetErrorCode());
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
412 throw;
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
413 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
414 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
415
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
416
70
e6c13ddd26d9 all integration tests passing with LookupResources extension
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parents: 67
diff changeset
417 size_t DatabaseManager::StatementBase::GetResultFieldsCount() const
0
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
418 {
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
419 try
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
420 {
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
421 return GetResult().GetFieldsCount();
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
422 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
423 catch (Orthanc::OrthancException& e)
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
424 {
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
425 manager_.CloseIfUnavailable(e.GetErrorCode());
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
426 throw;
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
427 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
428 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
429
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
430
70
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parents: 67
diff changeset
431 void DatabaseManager::StatementBase::SetResultFieldType(size_t field,
e6c13ddd26d9 all integration tests passing with LookupResources extension
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 67
diff changeset
432 ValueType type)
0
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
433 {
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
434 try
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
435 {
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
436 if (!GetResult().IsDone())
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
437 {
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
438 GetResult().SetExpectedType(field, type);
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
439 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
440 }
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
441 catch (Orthanc::OrthancException& e)
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
442 {
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
443 manager_.CloseIfUnavailable(e.GetErrorCode());
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
444 throw;
7cea966b6829 initial commit
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
445 }
7cea966b6829 initial commit
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446 }
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447
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448
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449 const IValue& DatabaseManager::StatementBase::GetResultField(size_t index) const
0
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450 {
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451 try
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452 {
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453 return GetResult().GetField(index);
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454 }
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455 catch (Orthanc::OrthancException& e)
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456 {
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457 manager_.CloseIfUnavailable(e.GetErrorCode());
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458 throw;
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459 }
70
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460 }
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461
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462
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463 DatabaseManager::CachedStatement::CachedStatement(const StatementLocation& location,
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464 DatabaseManager& manager,
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465 const std::string& sql) :
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466 StatementBase(manager),
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467 location_(location)
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468 {
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469 statement_ = GetManager().LookupCachedStatement(location_);
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470
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471 if (statement_ == NULL)
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472 {
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473 SetQuery(new Query(sql));
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474 }
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475 else
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476 {
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477 LOG(TRACE) << "Reusing cached statement from "
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478 << location_.GetFile() << ":" << location_.GetLine();
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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 void DatabaseManager::CachedStatement::Execute(const Dictionary& parameters)
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484 {
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485 try
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486 {
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487 std::unique_ptr<Query> query(ReleaseQuery());
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488
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489 if (query.get() != NULL)
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490 {
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491 // Register the newly-created statement
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492 assert(statement_ == NULL);
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493 statement_ = &GetManager().CacheStatement(location_, *query);
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494 }
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495
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496 assert(statement_ != NULL);
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497
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498 /*
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499 TODO - Sample code to monitor the execution time of each
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500 cached statement, and publish it as an Orthanc metrics
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501
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502 #if HAS_ORTHANC_PLUGIN_METRICS == 1
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503 std::string name = (std::string(location_.GetFile()) + "_" +
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504 boost::lexical_cast<std::string>(location_.GetLine()));
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505 OrthancPlugins::MetricsTimer timer(name.c_str());
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506 #endif
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507 */
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508
70
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509 SetResult(GetTransaction().Execute(*statement_, parameters));
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510 }
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511 catch (Orthanc::OrthancException& e)
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512 {
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513 GetManager().CloseIfUnavailable(e.GetErrorCode());
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514 throw;
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515 }
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diff changeset
516 }
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diff changeset
517
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518
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519 DatabaseManager::StandaloneStatement::StandaloneStatement(DatabaseManager& manager,
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520 const std::string& sql) :
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521 StatementBase(manager)
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522 {
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523 SetQuery(new Query(sql));
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524 }
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525
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526
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527 DatabaseManager::StandaloneStatement::~StandaloneStatement()
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528 {
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diff changeset
529 // The result must be removed before the statement, cf. (*)
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530 ClearResult();
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531 statement_.reset();
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532 }
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parents: 67
diff changeset
533
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parents: 67
diff changeset
534
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diff changeset
535 void DatabaseManager::StandaloneStatement::Execute(const Dictionary& parameters)
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parents: 67
diff changeset
536 {
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diff changeset
537 try
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parents: 67
diff changeset
538 {
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diff changeset
539 std::unique_ptr<Query> query(ReleaseQuery());
70
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parents: 67
diff changeset
540 assert(query.get() != NULL);
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541
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diff changeset
542 // The "statement_" object must be kept as long as the "IResult"
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543 // is not destroyed, as the "IResult" can make calls to the
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diff changeset
544 // statement (this is the case for SQLite and MySQL) - (*)
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diff changeset
545 statement_.reset(GetManager().GetDatabase().Compile(*query));
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diff changeset
546 assert(statement_.get() != NULL);
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parents: 67
diff changeset
547
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diff changeset
548 SetResult(GetTransaction().Execute(*statement_, parameters));
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diff changeset
549 }
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diff changeset
550 catch (Orthanc::OrthancException& e)
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parents: 67
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551 {
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diff changeset
552 GetManager().CloseIfUnavailable(e.GetErrorCode());
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553 throw;
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diff changeset
554 }
0
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555 }
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556 }