Non-Blocking Domain Event Handling with @Async and @EventListener

public record OrderCreatedEvent(Long orderId, String customerEmail) {}
 
@Service
public class OrderNotificationListener {
 
    private final EmailClient emailClient;
 
    public OrderNotificationListener(EmailClient emailClient) {
        this.emailClient = emailClient;
    }
 
    @Async("notificationTaskExecutor")
    @EventListener
    public CompletableFuture<Void> handleOrderCreated(OrderCreatedEvent event) {
        emailClient.sendOrderConfirmation(event.customerEmail(), event.orderId());
        return CompletableFuture.completedFuture(null);
    }
}