annotate Framework/PostgreSQL/PostgreSQLTransaction.cpp @ 255:d663d9e44f8d

reintroduction of IDatabaseFactory into DatabaseManager
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 14 Apr 2021 17:57:08 +0200
parents 35598014f140
children 16aac0287485
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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 "PostgreSQLTransaction.h"
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23
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24 #include "PostgreSQLStatement.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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30 namespace OrthancDatabases
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31 {
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32 PostgreSQLTransaction::PostgreSQLTransaction(PostgreSQLDatabase& database,
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33 TransactionType type) :
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34 database_(database),
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35 isOpen_(false)
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36 {
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37 Begin(type);
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38 }
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40
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41 PostgreSQLTransaction::~PostgreSQLTransaction()
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42 {
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43 if (isOpen_)
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44 {
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45 LOG(INFO) << "PostgreSQL: An active PostgreSQL transaction was dismissed";
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47 try
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48 {
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49 database_.ExecuteMultiLines("ABORT");
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50 }
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51 catch (Orthanc::OrthancException&)
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52 {
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53 // Ignore possible exceptions due to connection loss
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54 }
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55 }
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56 }
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59 void PostgreSQLTransaction::Begin(TransactionType type)
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60 {
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61 if (isOpen_)
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62 {
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63 LOG(ERROR) << "PostgreSQL: Beginning a transaction twice!";
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64 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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65 }
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66
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67 database_.ExecuteMultiLines("BEGIN");
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68
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69 switch (type)
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70 {
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71 case TransactionType_ReadWrite:
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72 database_.ExecuteMultiLines("SET TRANSACTION ISOLATION LEVEL SERIALIZABLE READ WRITE");
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73 break;
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75 case TransactionType_ReadOnly:
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76 database_.ExecuteMultiLines("SET TRANSACTION ISOLATION LEVEL SERIALIZABLE READ ONLY");
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77 break;
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79 default:
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80 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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81 }
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82
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83 isOpen_ = true;
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84 }
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86
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87 void PostgreSQLTransaction::Rollback()
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88 {
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89 if (!isOpen_)
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90 {
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91 LOG(ERROR) << "PostgreSQL: Attempting to rollback a nonexistent transaction. "
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92 << "Did you remember to call Begin()?";
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93 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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94 }
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95
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96 database_.ExecuteMultiLines("ABORT");
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97 isOpen_ = false;
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98 }
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100
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101 void PostgreSQLTransaction::Commit()
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102 {
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103 if (!isOpen_)
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104 {
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105 LOG(ERROR) << "PostgreSQL: Attempting to roll back a nonexistent transaction. "
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106 << "Did you remember to call Begin()?";
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107 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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108 }
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109
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110 database_.ExecuteMultiLines("COMMIT");
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111 isOpen_ = false;
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112 }
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113
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114
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115 IResult* PostgreSQLTransaction::Execute(IPrecompiledStatement& statement,
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116 const Dictionary& parameters)
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117 {
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118 return dynamic_cast<PostgreSQLStatement&>(statement).Execute(*this, parameters);
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119 }
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121
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122 void PostgreSQLTransaction::ExecuteWithoutResult(IPrecompiledStatement& statement,
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123 const Dictionary& parameters)
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124 {
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125 dynamic_cast<PostgreSQLStatement&>(statement).ExecuteWithoutResult(*this, parameters);
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126 }
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127 }