Mercurial > hg > orthanc-databases
annotate Framework/PostgreSQL/PostgreSQLTransaction.cpp @ 370:d2b5d9c92214 pg-transactions
PG: test feature: configurable transaction isolation level
| author | Alain Mazy <am@osimis.io> |
|---|---|
| date | Wed, 22 Feb 2023 16:52:04 +0100 |
| parents | 16aac0287485 |
| children | 15bfd9a76f8d |
| rev | line source |
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| 0 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
|
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5 * Copyright (C) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 0 | 7 * |
| 8 * This program is free software: you can redistribute it and/or | |
| 9 * modify it under the terms of the GNU Affero General Public License | |
| 10 * as published by the Free Software Foundation, either version 3 of | |
| 11 * the License, or (at your option) any later version. | |
| 12 * | |
| 13 * This program is distributed in the hope that it will be useful, but | |
| 14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 * Affero General Public License for more details. | |
| 17 * | |
| 18 * You should have received a copy of the GNU Affero General Public License | |
| 19 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 20 **/ | |
| 21 | |
| 22 | |
| 23 #include "PostgreSQLTransaction.h" | |
| 24 | |
| 25 #include "PostgreSQLStatement.h" | |
| 26 | |
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27 #include <Compatibility.h> // For std::unique_ptr<> |
| 152 | 28 #include <Logging.h> |
| 29 #include <OrthancException.h> | |
| 0 | 30 |
| 31 namespace OrthancDatabases | |
| 32 { | |
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33 PostgreSQLTransaction::PostgreSQLTransaction(PostgreSQLDatabase& database, |
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34 TransactionType type) : |
| 0 | 35 database_(database), |
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36 isOpen_(false) |
| 0 | 37 { |
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38 Begin(type); |
| 0 | 39 } |
| 40 | |
| 41 | |
| 42 PostgreSQLTransaction::~PostgreSQLTransaction() | |
| 43 { | |
| 44 if (isOpen_) | |
| 45 { | |
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46 LOG(INFO) << "PostgreSQL: An active PostgreSQL transaction was dismissed"; |
| 0 | 47 |
| 48 try | |
| 49 { | |
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50 database_.ExecuteMultiLines("ABORT"); |
| 0 | 51 } |
| 52 catch (Orthanc::OrthancException&) | |
| 53 { | |
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54 // Ignore possible exceptions due to connection loss |
| 0 | 55 } |
| 56 } | |
| 57 } | |
| 58 | |
| 59 | |
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60 void PostgreSQLTransaction::Begin(TransactionType type) |
| 0 | 61 { |
| 62 if (isOpen_) | |
| 63 { | |
| 64 LOG(ERROR) << "PostgreSQL: Beginning a transaction twice!"; | |
| 65 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 66 } | |
| 67 | |
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68 database_.ExecuteMultiLines("BEGIN"); |
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69 |
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70 switch (type) |
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71 { |
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72 case TransactionType_ReadWrite: |
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73 { |
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74 const std::string& statement = database_.GetReadWriteTransactionStatement(); |
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75 if (!statement.empty()) // if not defined, will use the default DB transaction isolation level |
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76 { |
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77 database_.ExecuteMultiLines(statement); |
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78 } |
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79 }; break; |
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80 |
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81 case TransactionType_ReadOnly: |
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82 { |
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83 const std::string& statement = database_.GetReadOnlyTransactionStatement(); |
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84 if (!statement.empty()) // if not defined, will use the default DB transaction isolation level |
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85 { |
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86 database_.ExecuteMultiLines(statement); |
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87 } |
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88 }; break; |
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89 |
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90 default: |
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91 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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92 } |
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93 |
| 0 | 94 isOpen_ = true; |
| 95 } | |
| 96 | |
| 97 | |
| 98 void PostgreSQLTransaction::Rollback() | |
| 99 { | |
| 100 if (!isOpen_) | |
| 101 { | |
| 102 LOG(ERROR) << "PostgreSQL: Attempting to rollback a nonexistent transaction. " | |
| 103 << "Did you remember to call Begin()?"; | |
| 104 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 105 } | |
| 106 | |
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107 database_.ExecuteMultiLines("ABORT"); |
| 0 | 108 isOpen_ = false; |
| 109 } | |
| 110 | |
| 111 | |
| 112 void PostgreSQLTransaction::Commit() | |
| 113 { | |
| 114 if (!isOpen_) | |
| 115 { | |
| 116 LOG(ERROR) << "PostgreSQL: Attempting to roll back a nonexistent transaction. " | |
| 117 << "Did you remember to call Begin()?"; | |
| 118 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 119 } | |
| 120 | |
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121 database_.ExecuteMultiLines("COMMIT"); |
| 0 | 122 isOpen_ = false; |
| 123 } | |
| 124 | |
| 125 | |
| 126 IResult* PostgreSQLTransaction::Execute(IPrecompiledStatement& statement, | |
| 127 const Dictionary& parameters) | |
| 128 { | |
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129 return dynamic_cast<PostgreSQLStatement&>(statement).Execute(*this, parameters); |
| 0 | 130 } |
| 131 | |
| 132 | |
| 133 void PostgreSQLTransaction::ExecuteWithoutResult(IPrecompiledStatement& statement, | |
| 134 const Dictionary& parameters) | |
| 135 { | |
| 136 dynamic_cast<PostgreSQLStatement&>(statement).ExecuteWithoutResult(*this, parameters); | |
| 137 } | |
| 138 } |