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DoctrinePingConnectionMiddleware.php
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DoctrinePingConnectionMiddleware.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Bridge\Doctrine\Messenger;
use Doctrine\DBAL\Connection;
use Doctrine\DBAL\Exception as DBALException;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\Messenger\Envelope;
use Symfony\Component\Messenger\Middleware\StackInterface;
use Symfony\Component\Messenger\Stamp\ConsumedByWorkerStamp;
/**
* Checks whether the connection is still open or reconnects otherwise.
*
* @author Fuong <insidestyles@gmail.com>
*/
class DoctrinePingConnectionMiddleware extends AbstractDoctrineMiddleware
{
protected function handleForManager(EntityManagerInterface $entityManager, Envelope $envelope, StackInterface $stack): Envelope
{
if (null !== $envelope->last(ConsumedByWorkerStamp::class)) {
$this->pingConnection($entityManager);
}
return $stack->next()->handle($envelope, $stack);
}
private function pingConnection(EntityManagerInterface $entityManager): void
{
$connection = $entityManager->getConnection();
try {
$this->executeDummySql($connection);
} catch (DBALException $e) {
$connection->close();
// Attempt to reestablish the lazy connection by sending another query.
$this->executeDummySql($connection);
}
if (!$entityManager->isOpen()) {
$this->managerRegistry->resetManager($this->entityManagerName);
}
}
/**
* @throws DBALException
*/
private function executeDummySql(Connection $connection): void
{
$connection->executeQuery($connection->getDatabasePlatform()->getDummySelectSQL());
}
}