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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Database
*/
namespace Wikimedia\Rdbms;
use Psr\Log\LoggerInterface;
/**
* Manage savepoints within a transaction
* @ingroup Database
* @since 1.19
* @deprecated since 1.31, use IDatabase::startAtomic() and such instead.
*/
class SavepointPostgres {
/** @var DatabasePostgres Establish a savepoint within a transaction */
protected $dbw;
/** @var LoggerInterface */
protected $logger;
/** @var int */
protected $id;
/** @var bool */
protected $didbegin;
/**
* @param DatabasePostgres $dbw
* @param int $id
* @param LoggerInterface $logger
*/
public function __construct( DatabasePostgres $dbw, $id, LoggerInterface $logger ) {
$this->dbw = $dbw;
$this->logger = $logger;
$this->id = $id;
$this->didbegin = false;
/* If we are not in a transaction, we need to be for savepoint trickery */
if ( !$dbw->trxLevel() ) {
$dbw->begin( __CLASS__, DatabasePostgres::TRANSACTION_INTERNAL );
$this->didbegin = true;
}
}
public function __destruct() {
if ( $this->didbegin ) {
$this->dbw->rollback();
$this->didbegin = false;
}
}
public function commit() {
if ( $this->didbegin ) {
$this->dbw->commit( __CLASS__, DatabasePostgres::FLUSHING_INTERNAL );
$this->didbegin = false;
}
}
protected function query( $keyword, $msg_ok, $msg_failed ) {
if ( $this->dbw->doQuery( $keyword . " " . $this->id ) !== false ) {
$this->logger->debug( sprintf( $msg_ok, $this->id ) );
} else {
$this->logger->debug( sprintf( $msg_failed, $this->id ) );
}
}
public function savepoint() {
$this->query( "SAVEPOINT",
"Transaction state: savepoint \"%s\" established.\n",
"Transaction state: establishment of savepoint \"%s\" FAILED.\n"
);
}
public function release() {
$this->query( "RELEASE",
"Transaction state: savepoint \"%s\" released.\n",
"Transaction state: release of savepoint \"%s\" FAILED.\n"
);
}
public function rollback() {
$this->query( "ROLLBACK TO",
"Transaction state: savepoint \"%s\" rolled back.\n",
"Transaction state: rollback of savepoint \"%s\" FAILED.\n"
);
}
public function __toString() {
return (string)$this->id;
}
}
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