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/**
* Orthanc - A Lightweight, RESTful DICOM Store
* Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
* Department, University Hospital of Liege, Belgium
* Copyright (C) 2017-2023 Osimis S.A., Belgium
* Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
*
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License
* as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
**/
#include "PostgreSQLTransaction.h"
#include "PostgreSQLStatement.h"
#include <Compatibility.h> // For std::unique_ptr<>
#include <Logging.h>
#include <OrthancException.h>
namespace OrthancDatabases
{
PostgreSQLTransaction::PostgreSQLTransaction(PostgreSQLDatabase& database,
TransactionType type) :
database_(database),
isOpen_(false)
{
Begin(type);
}
PostgreSQLTransaction::~PostgreSQLTransaction()
{
if (isOpen_)
{
LOG(INFO) << "PostgreSQL: An active PostgreSQL transaction was dismissed";
try
{
database_.ExecuteMultiLines("ABORT");
}
catch (Orthanc::OrthancException&)
{
// Ignore possible exceptions due to connection loss
}
}
}
void PostgreSQLTransaction::Begin(TransactionType type)
{
if (isOpen_)
{
LOG(ERROR) << "PostgreSQL: Beginning a transaction twice!";
throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
}
database_.ExecuteMultiLines("BEGIN");
switch (type)
{
case TransactionType_ReadWrite:
database_.ExecuteMultiLines("SET TRANSACTION ISOLATION LEVEL SERIALIZABLE READ WRITE");
break;
case TransactionType_ReadOnly:
database_.ExecuteMultiLines("SET TRANSACTION ISOLATION LEVEL SERIALIZABLE READ ONLY");
break;
default:
throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
}
isOpen_ = true;
}
void PostgreSQLTransaction::Rollback()
{
if (!isOpen_)
{
LOG(ERROR) << "PostgreSQL: Attempting to rollback a nonexistent transaction. "
<< "Did you remember to call Begin()?";
throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
}
database_.ExecuteMultiLines("ABORT");
isOpen_ = false;
}
void PostgreSQLTransaction::Commit()
{
if (!isOpen_)
{
LOG(ERROR) << "PostgreSQL: Attempting to roll back a nonexistent transaction. "
<< "Did you remember to call Begin()?";
throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
}
database_.ExecuteMultiLines("COMMIT");
isOpen_ = false;
}
IResult* PostgreSQLTransaction::Execute(IPrecompiledStatement& statement,
const Dictionary& parameters)
{
return dynamic_cast<PostgreSQLStatement&>(statement).Execute(*this, parameters);
}
void PostgreSQLTransaction::ExecuteWithoutResult(IPrecompiledStatement& statement,
const Dictionary& parameters)
{
dynamic_cast<PostgreSQLStatement&>(statement).ExecuteWithoutResult(*this, parameters);
}
}
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