Callbacks e Strategy em api's mobile

gistfile1.txt

public interface OrderCheckoutCallback {

	void onSuccess(OrderFrete order);

	void shippingInformationWithValidationIssues();

	void orderAlreadyProcessed(Order order);

	void sellerNotFoundOnCarts();
}


@Controller
@BlockUnloggedUsers
public class CheckoutController {

	@Inject
	private Result result;
	//demais dependências

	@AvailableRoutes(value={PageRoute.MOBILE, PageRoute.DESKTOP})
	@Path( {"/checkout/{sellerId}"} )
	public void checkout(final ContactInformation contactInformation, final Long sellerId) {
		checkoutExecutor.sendOrderFinal(contactInformation, sellerId, new OrderCheckoutCallback() {

			@Override
			public void orderAlreadyProcessed(Order order) {
				result.redirectTo(urlBuilder.buyerOrderDetailUrl(order));
			}

			@Override
			public void onSuccess(Order order) {
				result.include("createdOrder", order);
				result.redirectTo(BuyerOrderDetailsController.class).show(order.getId()));
			}

			@Override
			public void sellerNotFoundOnCarts() {
				result.redirectTo(CartController.class).show(sellerId);
			}

			@Override
			public void shippingInformationWithValidationIssues() {
				result.include("contactInformation", contactInformation);
				result.redirectTo(CheckoutController.class).form(sellerId);
			}
		});
	}
}

@Controller
@BlockUnloggedUsers
public class CheckoutApiController {

	@Inject
	private ApiResult result; //result customizado que serializa para content-type JSON
	//demais dependências

	@AvailableRoutes(value={PageRoute.NATIVE_APP})
	@Path( {"/mobile/{apiVersion}/checkout/{sellerId}"} )
	public void checkout(ContactInformation contactInformation, final Long sellerId) {
		checkoutExecutor.sendOrderFinal(contactInformation, sellerId, new OrderCheckoutCallback() {

			@Override
			public void orderAlreadyProcessed(Order order) {
				OrderDTO orderDTO = dtoConverter.convert(order); //modelo do jar compartilhado com Android
				result.success(apiVersion, orderDTO);
			}

			@Override
			public void onSuccess(Order order) {
				OrderDTO orderDTO = dtoConverter.convert(order); //modelo do jar compartilhado com Android
				result.created(apiVersion, orderDTO);
			}

			@Override
			public void sellerNotFoundOnCarts() {
				result.notFound(apiVersion);
			}

			@Override
			public void shippingInformationWithValidationIssues() {
				result.badRequest(version);
			}
		});
	}
}