mirror of https://github.com/nextcloud/server
119 lines
3.7 KiB
PHP
119 lines
3.7 KiB
PHP
<?php
|
|
|
|
declare(strict_types=1);
|
|
|
|
/**
|
|
* @copyright Copyright (c) 2016, ownCloud, Inc.
|
|
*
|
|
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
|
|
* @author Joas Schilling <coding@schilljs.com>
|
|
* @author Morris Jobke <hey@morrisjobke.de>
|
|
* @author Vincent Petry <vincent@nextcloud.com>
|
|
*
|
|
* @license AGPL-3.0
|
|
*
|
|
* This code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License, version 3,
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* 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, version 3,
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
namespace OCA\Files_Sharing;
|
|
|
|
use OCP\AppFramework\Db\TTransactional;
|
|
use OCP\AppFramework\Utility\ITimeFactory;
|
|
use OCP\BackgroundJob\TimedJob;
|
|
use OCP\DB\QueryBuilder\IQueryBuilder;
|
|
use OCP\IDBConnection;
|
|
use PDO;
|
|
use Psr\Log\LoggerInterface;
|
|
use function array_map;
|
|
|
|
/**
|
|
* Delete all share entries that have no matching entries in the file cache table.
|
|
*/
|
|
class DeleteOrphanedSharesJob extends TimedJob {
|
|
|
|
use TTransactional;
|
|
|
|
private const CHUNK_SIZE = 1000;
|
|
|
|
private const INTERVAL = 24 * 60 * 60; // 1 day
|
|
|
|
private IDBConnection $db;
|
|
|
|
private LoggerInterface $logger;
|
|
|
|
/**
|
|
* sets the correct interval for this timed job
|
|
*/
|
|
public function __construct(
|
|
ITimeFactory $time,
|
|
IDBConnection $db,
|
|
LoggerInterface $logger
|
|
) {
|
|
parent::__construct($time);
|
|
|
|
$this->db = $db;
|
|
|
|
$this->setInterval(self::INTERVAL); // 1 day
|
|
$this->setTimeSensitivity(self::TIME_INSENSITIVE);
|
|
$this->logger = $logger;
|
|
}
|
|
|
|
/**
|
|
* Makes the background job do its work
|
|
*
|
|
* @param array $argument unused argument
|
|
*/
|
|
public function run($argument) {
|
|
$qbSelect = $this->db->getQueryBuilder();
|
|
$qbSelect->select('id')
|
|
->from('share', 's')
|
|
->leftJoin('s', 'filecache', 'fc', $qbSelect->expr()->eq('s.file_source', 'fc.fileid'))
|
|
->where($qbSelect->expr()->isNull('fc.fileid'))
|
|
->setMaxResults(self::CHUNK_SIZE);
|
|
$deleteQb = $this->db->getQueryBuilder();
|
|
$deleteQb->delete('share')
|
|
->where(
|
|
$deleteQb->expr()->in('id', $deleteQb->createParameter('ids'), IQueryBuilder::PARAM_INT_ARRAY)
|
|
);
|
|
|
|
/**
|
|
* Read a chunk of orphan rows and delete them. Continue as long as the
|
|
* chunk is filled and time before the next cron run does not run out.
|
|
*
|
|
* Note: With isolation level READ COMMITTED, the database will allow
|
|
* other transactions to delete rows between our SELECT and DELETE. In
|
|
* that (unlikely) case, our DELETE will have fewer affected rows than
|
|
* IDs passed for the WHERE IN. If this happens while processing a full
|
|
* chunk, the logic below will stop prematurely.
|
|
* Note: The queries below are optimized for low database locking. They
|
|
* could be combined into one single DELETE with join or sub query, but
|
|
* that has shown to (dead)lock often.
|
|
*/
|
|
$cutOff = $this->time->getTime() + self::INTERVAL;
|
|
do {
|
|
$deleted = $this->atomic(function () use ($qbSelect, $deleteQb) {
|
|
$result = $qbSelect->executeQuery();
|
|
$ids = array_map('intval', $result->fetchAll(PDO::FETCH_COLUMN));
|
|
$result->closeCursor();
|
|
$deleteQb->setParameter('ids', $ids, IQueryBuilder::PARAM_INT_ARRAY);
|
|
$deleted = $deleteQb->executeStatement();
|
|
$this->logger->debug("{deleted} orphaned share(s) deleted", [
|
|
'app' => 'DeleteOrphanedSharesJob',
|
|
'deleted' => $deleted,
|
|
]);
|
|
return $deleted;
|
|
}, $this->db);
|
|
} while ($deleted >= self::CHUNK_SIZE && $this->time->getTime() <= $cutOff);
|
|
}
|
|
}
|