DoctrineTransactionMiddleware.php

<?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\ORM\EntityManagerInterface;
use Symfony\Component\Messenger\Envelope;
use Symfony\Component\Messenger\Exception\HandlerFailedException;
use Symfony\Component\Messenger\Middleware\StackInterface;
use Symfony\Component\Messenger\Stamp\HandledStamp;

/**
 * Wraps all handlers in a single doctrine transaction.
 *
 * @author Tobias Nyholm <tobias.nyholm@gmail.com>
 */
class DoctrineTransactionMiddleware extends AbstractDoctrineMiddleware
{
    protected function handleForManager(EntityManagerInterface $entityManager, Envelope $envelope, StackInterface $stack): Envelope
    {
        $entityManager->getConnection()->beginTransaction();
        try {
            $envelope = $stack->next()->handle($envelope, $stack);
            $entityManager->flush();
            $entityManager->getConnection()->commit();

            return $envelope;
        } catch (\Throwable $exception) {
            $this->tryRollBackTransaction($entityManager, $exception);

            if ($exception instanceof HandlerFailedException) {
                // Remove all HandledStamp from the envelope so the retry will execute all handlers again.
                // When a handler fails, the queries of allegedly successful previous handlers just got rolled back.
                throw new HandlerFailedException($exception->getEnvelope()->withoutAll(HandledStamp::class), $exception->getWrappedExceptions());
            }

            throw $exception;
        }
    }

    private function tryRollBackTransaction(EntityManagerInterface $entityManager, \Throwable|\Exception $exception): void
    {
        try {
            $entityManager->getConnection()->rollBack();
        } catch (\Throwable $doctrineException) {
            throw new HandlerFailedException($doctrineException->getMessage(), previous: $exception);
        }
    }
}