vendor/symfony/messenger/Middleware/SendMessageMiddleware.php line 36
<?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\Component\Messenger\Middleware;use Psr\EventDispatcher\EventDispatcherInterface;use Psr\Log\LoggerAwareTrait;use Psr\Log\NullLogger;use Symfony\Component\Messenger\Envelope;use Symfony\Component\Messenger\Event\SendMessageToTransportsEvent;use Symfony\Component\Messenger\Exception\NoSenderForMessageException;use Symfony\Component\Messenger\Stamp\ReceivedStamp;use Symfony\Component\Messenger\Stamp\SentStamp;use Symfony\Component\Messenger\Transport\Sender\SendersLocatorInterface;/*** @author Samuel Roze <samuel.roze@gmail.com>* @author Tobias Schultze <http://tobion.de>*/class SendMessageMiddleware implements MiddlewareInterface{use LoggerAwareTrait;private SendersLocatorInterface $sendersLocator;private ?EventDispatcherInterface $eventDispatcher;private bool $allowNoSenders;public function __construct(SendersLocatorInterface $sendersLocator, EventDispatcherInterface $eventDispatcher = null, bool $allowNoSenders = true){$this->sendersLocator = $sendersLocator;$this->eventDispatcher = $eventDispatcher;$this->allowNoSenders = $allowNoSenders;$this->logger = new NullLogger();}public function handle(Envelope $envelope, StackInterface $stack): Envelope{$context = ['class' => \get_class($envelope->getMessage()),];$sender = null;if ($envelope->all(ReceivedStamp::class)) {// it's a received message, do not send it back$this->logger->info('Received message {class}', $context);} else {$shouldDispatchEvent = true;$senders = $this->sendersLocator->getSenders($envelope);$senders = \is_array($senders) ? $senders : iterator_to_array($senders);foreach ($senders as $alias => $sender) {if (null !== $this->eventDispatcher && $shouldDispatchEvent) {$event = new SendMessageToTransportsEvent($envelope, $senders);$this->eventDispatcher->dispatch($event);$envelope = $event->getEnvelope();$shouldDispatchEvent = false;}$this->logger->info('Sending message {class} with {alias} sender using {sender}', $context + ['alias' => $alias, 'sender' => $sender::class]);$envelope = $sender->send($envelope->with(new SentStamp($sender::class, \is_string($alias) ? $alias : null)));}if (!$this->allowNoSenders && !$sender) {throw new NoSenderForMessageException(sprintf('No sender for message "%s".', $context['class']));}}if (null === $sender) {return $stack->next()->handle($envelope, $stack);}// message should only be sent and not be handled by the next middlewarereturn $envelope;}}