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Created Oct 14, 2021
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public class QuickOrderTrxHandler : IRequestHandler<QuickOrderCommand>
private readonly ICatalogService _catalogService;
private readonly IWarehouseService _warehouseService;
private readonly IOrderRepository _orderRepository;
public QuickOrderTrxHandler(ICatalogService catalogService, IWarehouseService warehouseService, IOrderRepository orderRepository)
_catalogService = catalogService;
_warehouseService = warehouseService;
_orderRepository = orderRepository;
public async Task Handle(QuickOrderCommand request)
using var trx = _orderRepository.BeginTransaction(IsolationLevel.Serializable);
if (await _warehouseService.QuantityOnHand(request.Sku, trx) <= 0)
throw new InvalidOperationException("Product has no quantity on hand.");
var price = await _catalogService.Price(request.Sku, trx);
var quickOrder = new QuickOrder(request.Sku, price);
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