private InvoiceRequestFactory invoiceRequestFactory;

 

  @EventListener

  public void handle(OrderSubmittedEvent event){

   

    InvoiceRequest request  = invoiceRequestFactory.create(client, purchase);

    Invoice invoice = bookKeeper.issuance(request, taxAdvisor.suggestBestTax(client));

   

    invoiceRepository.save(invoice);

  }

  @Override

  public OrderDto find(AggregateId orderId) {

    Reservation reservation = entityManager.find(Reservation.class, orderId);

   

    return toOrderDto(reservation, purchase);

  }

    if (! newOffer.sameAs(seenOffer, 5))//TODO load delta from conf.

      throw new OfferChangedExcpetion(reservation.getAggregateId(), seenOffer, newOffer);

   

    Client client = loadClient();//create per logged client, not reservation owner         

       

      throw new DomainOperationException(client.getAggregateId(), "client has insufficent money");

   

    purchaseRepository.save(purchase);//Aggregate must be managed by persistence context before firing events (synchronous listeners may need to load it)

   

    /*

     * Sample model where one aggregate creates another. Client does not manage payment lifecycle, therefore application must manage it.

     */

    paymentRepository.save(payment);

   

    reservation.close();       

   

    reservationRepository.save(reservation);

    clientRepository.save(client);