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annotate Framework/PostgreSQL/PostgreSQLDatabase.h @ 370:d2b5d9c92214 pg-transactions

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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
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Affero General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Affero General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Affero General Public License
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #pragma once
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24
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25 #if ORTHANC_ENABLE_POSTGRESQL != 1
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26 # error PostgreSQL support must be enabled to use this file
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27 #endif
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28
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29 #include "PostgreSQLParameters.h"
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30 #include "../Common/IDatabaseFactory.h"
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31
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32 namespace OrthancDatabases
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33 {
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34 class PostgreSQLDatabase : public IDatabase
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35 {
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36 private:
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37 friend class PostgreSQLStatement;
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38 friend class PostgreSQLLargeObject;
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39 friend class PostgreSQLTransaction;
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41 class Factory;
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42
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43 PostgreSQLParameters parameters_;
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44 void* pg_; /* Object of type "PGconn*" */
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45
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46 void ThrowException(bool log);
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47
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48 void Close();
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49
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50 bool RunAdvisoryLockStatement(const std::string& statement);
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51
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52 public:
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53 explicit PostgreSQLDatabase(const PostgreSQLParameters& parameters) :
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54 parameters_(parameters),
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55 pg_(NULL)
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56 {
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57 }
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58
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59 ~PostgreSQLDatabase();
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61 void Open();
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62
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63 bool AcquireAdvisoryLock(int32_t lock);
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64
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65 bool ReleaseAdvisoryLock(int32_t lock);
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66
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67 void AdvisoryLock(int32_t lock);
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68
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69 void ExecuteMultiLines(const std::string& sql);
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70
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71 bool DoesTableExist(const std::string& name);
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72
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73 bool DoesColumnExist(const std::string& tableName,
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74 const std::string& columnName);
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76 void ClearAll(); // Only for unit tests!
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77
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78 virtual Dialect GetDialect() const ORTHANC_OVERRIDE
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79 {
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80 return Dialect_PostgreSQL;
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81 }
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82
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83 virtual IPrecompiledStatement* Compile(const Query& query) ORTHANC_OVERRIDE;
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84
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85 virtual ITransaction* CreateTransaction(TransactionType type) ORTHANC_OVERRIDE;
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86
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87 class TransientAdvisoryLock
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88 {
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89 private:
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90 PostgreSQLDatabase& database_;
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91 int32_t lock_;
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93 public:
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94 TransientAdvisoryLock(PostgreSQLDatabase& database,
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95 int32_t lock);
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96
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97 ~TransientAdvisoryLock();
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98 };
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100 static IDatabaseFactory* CreateDatabaseFactory(const PostgreSQLParameters& parameters);
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101
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102 static PostgreSQLDatabase* CreateDatabaseConnection(const PostgreSQLParameters& parameters);
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103
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104 protected:
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105 const std::string& GetReadWriteTransactionStatement() const
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106 {
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107 return parameters_.GetReadWriteTransactionStatement();
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108 }
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109
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110 const std::string& GetReadOnlyTransactionStatement() const
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111 {
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112 return parameters_.GetReadOnlyTransactionStatement();
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113 }
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114
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115 };
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116 }