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Run cleanup of expired DB file locks to background job 

* fixes #22819

The old way fired a DELETE statement on each destruction of the
DBLockingProvider. Which could cause a lot of queries. It's enough
to run this every 5 minutes in a background job, which in the end
could result in file locks that exists 5 minutes longer - in the
worst case and for not properly released locks.

This makes the DB based locking a lot more performant and could
result in a similar performance to the Redis based locking provider.
This commit is contained in:
Morris Jobke 2016-03-04 15:42:35 +01:00
parent bb0c304482
commit 9737290e39
5 changed files with 71 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
apps/files/appinfo/info.xml
View File

@ -6,7 +6,7 @@
<licence>AGPL</licence>
<author>Robin Appelman, Vincent Petry</author>
<default_enable/>
<version>1.4.3</version>
<version>1.4.4</version>
<types>
<filesystem/>
</types>

1
apps/files/appinfo/install.php
View File

@ -24,3 +24,4 @@
// Cron job for scanning user storages
\OC::$server->getJobList()->add('OCA\Files\BackgroundJob\ScanFiles');
\OC::$server->getJobList()->add('OCA\Files\BackgroundJob\DeleteOrphanedItems');
\OC::$server->getJobList()->add('OCA\Files\BackgroundJob\CleanupFileLocks');

1
apps/files/appinfo/update.php
View File

@ -102,3 +102,4 @@ if ($installedVersion === '1.1.9' && (
// Add cron job for scanning user storages
\OC::$server->getJobList()->add('OCA\Files\BackgroundJob\ScanFiles');
\OC::$server->getJobList()->add('OCA\Files\BackgroundJob\DeleteOrphanedItems');
\OC::$server->getJobList()->add('OCA\Files\BackgroundJob\CleanupFileLocks');

57
apps/files/lib/backgroundjob/cleanupfilelocks.php Normal file
View File

@ -0,0 +1,57 @@
<?php
/**
* @author Morris Jobke <hey@morrisjobke.de>
*
* @copyright Copyright (c) 2016, ownCloud, Inc.
* @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\BackgroundJob;
use OC\BackgroundJob\TimedJob;
use OC\Lock\DBLockingProvider;
/**
* Clean up all file locks that are expired for the DB file locking provider
*/
class CleanupFileLocks extends TimedJob {
/**
* Default interval in minutes
*
* @var int $defaultIntervalMin
**/
protected $defaultIntervalMin = 5;
/**
* sets the correct interval for this timed job
*/
public function __construct() {
$this->interval = $this->defaultIntervalMin * 60;
}
/**
* Makes the background job do its work
*
* @param array $argument unused argument
*/
public function run($argument) {
$lockingProvider = \OC::$server->getLockingProvider();
if($lockingProvider instanceof DBLockingProvider) {
$lockingProvider->cleanExpiredLocks();
}
}
}

26
lib/private/lock/dblockingprovider.php
View File

@ -235,10 +235,17 @@ class DBLockingProvider extends AbstractLockingProvider {
*/
public function cleanExpiredLocks() {
$expire = $this->timeFactory->getTime();
$this->connection->executeUpdate(
'DELETE FROM `*PREFIX*file_locks` WHERE `ttl` < ?',
[$expire]
);
try {
$this->connection->executeUpdate(
'DELETE FROM `*PREFIX*file_locks` WHERE `ttl` < ?',
[$expire]
);
} catch (\Exception $e) {
// If the table is missing, the clean up was successful
if ($this->connection->tableExists('file_locks')) {
throw $e;
}
}
}
/**
@ -257,15 +264,4 @@ class DBLockingProvider extends AbstractLockingProvider {
}
}
}
public function __destruct() {
try {
$this->cleanExpiredLocks();
} catch (\Exception $e) {
// If the table is missing, the clean up was successful
if ($this->connection->tableExists('file_locks')) {
throw $e;
}
}
}
}