Spring: ApplicationEvent decouples the publisher from the listener

record OrderPlaced(Long orderId) { }

@Service
class OrderService {
    private final ApplicationEventPublisher events;
    void place(Order o) {
        repo.save(o);
        events.publishEvent(new OrderPlaced(o.getId()));
    }
}

@Component
class EmailListener {
    @TransactionalEventListener(phase = AFTER_COMMIT)
    void on(OrderPlaced e) { mail.send(e.orderId()); }
}

The email is only sent once the order transaction has COMMITTED,
so a rolled-back order never sends a confirmation.