Mercurial > hg > orthanc-databases
annotate Framework/Common/ImplicitTransaction.cpp @ 23:b2ff1cd2907a
handling of implicit transactions in DatabaseManager
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 12 Jul 2018 10:44:17 +0200 |
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children | 69a94267cdea |
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1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2018 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 "ImplicitTransaction.h" |
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23 |
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24 #include <Core/Logging.h> |
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25 #include <Core/OrthancException.h> |
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26 |
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27 #include <memory> |
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28 |
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29 namespace OrthancDatabases |
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30 { |
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31 ImplicitTransaction::ImplicitTransaction() : |
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32 state_(State_Ready), |
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33 readOnly_(true) |
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34 { |
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35 } |
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36 |
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37 |
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38 ImplicitTransaction::~ImplicitTransaction() |
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39 { |
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40 switch (state_) |
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41 { |
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42 case State_Committed: |
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43 case State_Ready: |
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44 break; |
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45 |
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46 case State_Executed: |
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47 LOG(ERROR) << "An implicit transaction has not been committed"; |
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48 break; |
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49 |
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50 default: |
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51 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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52 } |
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53 } |
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54 |
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55 |
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56 void ImplicitTransaction::Rollback() |
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57 { |
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58 LOG(ERROR) << "Cannot rollback an implicit transaction"; |
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59 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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60 } |
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61 |
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62 |
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63 void ImplicitTransaction::Commit() |
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64 { |
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65 switch (state_) |
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66 { |
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67 case State_Ready: |
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68 LOG(ERROR) << "Cannot commit an implicit transaction that has not been executed yet"; |
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69 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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70 |
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71 case State_Executed: |
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72 state_ = State_Committed; |
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73 break; |
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74 |
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75 case State_Committed: |
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76 LOG(ERROR) << "Cannot commit twice an implicit transaction"; |
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77 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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78 |
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79 default: |
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80 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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81 } |
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82 } |
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83 |
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84 |
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85 void ImplicitTransaction::CheckStateForExecution() |
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86 { |
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87 switch (state_) |
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88 { |
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89 case State_Ready: |
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90 // OK |
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91 break; |
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92 |
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93 case State_Executed: |
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94 #if defined(NDEBUG) |
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95 // Release build. Ignore such errors. |
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96 LOG(INFO) << "Cannot execute more than one statement in an implicit transaction"; |
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97 break; |
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98 #else |
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99 /** |
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100 * Debug build. This allows to detect errors wrt. the handling |
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101 * of transactions in the Orthanc core. |
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102 * |
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103 * In Orthanc <= 1.3.2: problems in "/changes" (a transaction |
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104 * was missing because of GetPublicId()). |
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105 **/ |
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106 LOG(ERROR) << "Cannot execute more than one statement in an implicit transaction"; |
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107 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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108 #endif |
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109 |
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110 case State_Committed: |
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111 LOG(ERROR) << "Cannot commit twice an implicit transaction"; |
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112 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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113 |
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114 default: |
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115 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); |
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116 } |
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117 } |
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118 |
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119 |
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120 IResult* ImplicitTransaction::Execute(IPrecompiledStatement& statement, |
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121 const Dictionary& parameters) |
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122 { |
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123 CheckStateForExecution(); |
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124 std::auto_ptr<IResult> result(ExecuteInternal(statement, parameters)); |
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125 |
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126 if (!statement.IsReadOnly()) |
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127 { |
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128 readOnly_ = false; |
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129 } |
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130 |
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131 state_ = State_Executed; |
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132 return result.release(); |
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133 } |
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134 |
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135 |
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136 void ImplicitTransaction::ExecuteWithoutResult(IPrecompiledStatement& statement, |
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137 const Dictionary& parameters) |
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138 { |
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139 CheckStateForExecution(); |
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140 ExecuteWithoutResultInternal(statement, parameters); |
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141 |
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142 if (!statement.IsReadOnly()) |
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143 { |
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144 readOnly_ = false; |
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145 } |
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146 |
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147 state_ = State_Executed; |
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148 } |
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149 } |
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150 |