public override Task <OrderResponse> SubmitOrder(OrderRequest request, grpc::ServerCallContext context)
{
Console.WriteLine("Handling Order Request Submission");
var response = new OrderResponse();
if (!isValidRequest(request))
{
response.Accepted = false;
return(Task.FromResult(response));
}
var evt = OrderAcceptedEvent.FromProto(request);
if (eventEmitter.EmitOrderAcceptedEvent(evt))
{
foreach (var li in evt.LineItems)
{
var reservedEvent = new InventoryReservedEvent
{
OrderID = evt.OrderID,
ReservedOn = (ulong)DateTime.UtcNow.Ticks,
SKU = li.SKU,
Quantity = li.Quantity,
UserID = evt.UserID
};
if (!eventEmitter.EmitInventoryReservedEvent(reservedEvent))
{
response.Accepted = false;
return(Task.FromResult(response));
}
}
response.OrderID = evt.OrderID;
response.Accepted = true;
}
else
{
response.Accepted = false;
}
return(Task.FromResult(response));
}
public static OrderAcceptedEvent FromProto(OrderRequest tx)
{
var evt = new OrderAcceptedEvent
{
TaxRate = tx.TaxRate,
CreatedOn = tx.CreatedOn,
UserID = tx.UserID
};
evt.LineItems = new List <EventLineItem>();
foreach (LineItem li in tx.LineItems)
{
evt.LineItems.Add(new EventLineItem
{
SKU = li.SKU,
Quantity = li.Quantity,
UnitPrice = li.UnitPrice
});
}
return(evt);
}
public bool EmitOrderAcceptedEvent(OrderAcceptedEvent evt)
{
try
{
evt.OrderID = Guid.NewGuid().ToString();
var options = new KafkaOptions(new Uri("http://localhost:9092"));
var router = new BrokerRouter(options);
var client = new Producer(router);
string messageJson = JsonConvert.SerializeObject(evt);
Console.WriteLine($"Emitting Order Accepted Event {evt.OrderID}");
client.SendMessageAsync(ORDERS_TOPIC, new[] { new Message(messageJson) }).Wait();
return(true);
}
catch (Exception ex)
{
Console.WriteLine($"Failed to emit order accepted event {ex.ToString()}");
return(false);
}
}