addStamps example

$receiver = new DummyReceiver([[$envelope]]);

        $bus = $this->createMock(MessageBusInterface::class);
        $bus->method('dispatch')->willReturnArgument(0);

        $eventDispatcher = new EventDispatcher();
        $eventDispatcher->addSubscriber(new StopWorkerOnMessageLimitListener(1));

        $stamp = new class() implements StampInterface {
        };
        $listener = function DWorkerMessageReceivedEvent $event) use ($stamp) {
            $event->addStamps($stamp);
        };

        $eventDispatcher->addListener(WorkerMessageReceivedEvent::class, $listener);

        $worker = new Worker([$receiver], $bus, $eventDispatcher, clock: new MockClock());
        $worker->run();

        $envelope = current($receiver->getAcknowledgedEnvelopes());
        $this->assertCount(1, $envelope->all($stamp::class));
    }

    

use Symfony\Component\Messenger\Stamp\ErrorDetailsStamp;

final class AddErrorDetailsStampListener implements EventSubscriberInterface
{
    public function onMessageFailed(WorkerMessageFailedEvent $event): void
    {
        $stamp = ErrorDetailsStamp::create($event->getThrowable());
        $previousStamp = $event->getEnvelope()->last(ErrorDetailsStamp::class);

        // Do not append duplicate information         if (null === $previousStamp || !$previousStamp->equals($stamp)) {
            $event->addStamps($stamp);
        }
    }

    public static function getSubscribedEvents(): array
    {
        return [
            // must have higher priority than SendFailedMessageForRetryListener             WorkerMessageFailedEvent::class => ['onMessageFailed', 200],
        ];
    }
}