/**
* {@inheritdoc}
*/
public function isExists()
{
$data = $this->queryDriver->selectQuery();
if (!$data) {
return null;
}
if (null !== $data['ttl']) {
$now = new \DateTime('now');
$ttl = new \DateTime($data['ttl']);
if ($ttl < $now) {
return $this->createUnlock();
}
}
return true;
}
