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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*/
namespace Piwik\ArchiveProcessor;
use Piwik\Db;
use Piwik\SettingsPiwik;
class LoaderLock
{
public const MAX_LEN_LOCK_NAME = 64;
public const MAX_LOCK_TIME = 60; //in seconds
protected $id;
/**
* @param string $id
* @throws \Exception
*/
public function __construct($id)
{
// instanceId is needed for multi tenant database solution
$id = SettingsPiwik::getPiwikInstanceId() . $id;
if (mb_strlen($id) >= self::MAX_LEN_LOCK_NAME) {
//convert ot prefix and md5 full length
$id = mb_substr($id, 0, 32) . md5($id);
}
$this->id = $id;
}
public function setLock()
{
Db::fetchOne('SELECT GET_LOCK(?,?)', array($this->id, self::MAX_LOCK_TIME));
}
public function unLock()
{
Db::query('SELECT RELEASE_LOCK(?)', array($this->id));
}
public function getId()
{
return $this->id;
}
/**
* @description check if the lock is available to user
* @param string $key
* @return bool
* @throws \Exception
*/
public static function isLockAvailable($key)
{
return (bool)Db::fetchOne('SELECT IS_FREE_LOCK(?)', [$key]);
}
}
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