public async Task <CommandResult> Handle(PurchaseCommand purchaseCommand)
{
CommandResult commandResponse = ValidateCommand(purchaseCommand);
//if (!commandResponse.Succeed)
//{
// return commandResponse;
//}
//if (!await IsStoreServiceOn()) // REST call with auto retry policy
//{
// commandResponse.Error = "Sorry! Store Service is not On. You have to wait until it is open";
// return commandResponse;
//}
if (await GetCurrentStoreItems() > 1000L) // GRPC call with Circuit breaker policy
{
commandResponse.Error = "Sorry! Current storeitems more than 1000. So no more purchase possible";
return(commandResponse);
}
Purchase purchase = Map(purchaseCommand);
await purchaseRepository.Save(purchase);
ProductPurchasedEvent productPurchasedEvent = Map(purchase);
await serviceBus.Publish(Constants.MessageQueues.PurchasedQueue, productPurchasedEvent);
EmailParams emailParams = BuildEmailParameters(productPurchasedEvent);
await emailService.SendEmail(emailParams);
return(new CommandResult());
}
private EmailParams BuildEmailParameters(ProductPurchasedEvent @event)
{
long purchasedTotalPrice = 0;
@event.LineItems.ToList().ForEach(item => purchasedTotalPrice += item.PurchaedTotalPrice);
var emailParams = new EmailParams
{
Subject = "Product Purchased",
Body = $"The Product Purchased Amount={purchasedTotalPrice}"
};
emailParams.ToList.Add(Constants.EmailAddressess.AdminPurchaseEmailAddress);
return(emailParams);
}
private ProductPurchasedEvent Map(Purchase purchase)
{
var productPurchasedEvent = new ProductPurchasedEvent
{
PurchaseDate = purchase.PurchaseDate
};
foreach (ProductLineItem productLineItem in purchase.LineItems)
{
var lineItem = new PurchasedLineItem
{
ProductId = productLineItem.Product.Id,
PurchasedUnitPrice = productLineItem.PurchaseUnitPrice,
PurchasedQuantity = productLineItem.PurchaseQuantity
};
productPurchasedEvent.LineItems.Add(lineItem);
}
return(productPurchasedEvent);
}
public async Task ShouldPublishMessageWhenValidQueueProvided()
{
var lineItems = new List <PurchasedLineItem>
{
new PurchasedLineItem {
ProductId = Guid.NewGuid().ToString(), PurchasedUnitPrice = 100, PurchasedQuantity = 100
},
new PurchasedLineItem {
ProductId = Guid.NewGuid().ToString(), PurchasedUnitPrice = 200, PurchasedQuantity = 200
},
};
var productPurchasedEvent = new ProductPurchasedEvent
{
PurchaseDate = DateTime.UtcNow,
LineItems = lineItems
};
await rabbitMqServiceBus.Publish(QueueName, productPurchasedEvent);
}
private void OnProductPurchasedEvent(ProductPurchasedEvent productPurchasedEvent)
{
IsPurchaseOrderProcessed = productPurchasedEvent.IsPurchaseOrderProcessed;
}
