public override Task <CancelOrderResponse> CancelOrder(CancelOrderRequest request, grpc::ServerCallContext context)
{
Console.WriteLine("Handling Order cancellation request");
var result = new CancelOrderResponse();
try
{
var exists = orderManagementClient.OrderExists(new GetOrderRequest {
OrderID = request.OrderID
});
if (!exists.Exists)
{
result.Canceled = false;
return(Task.FromResult(result));
}
var originalOrder = orderManagementClient.GetOrder(new GetOrderRequest {
OrderID = request.OrderID
});
var evt = new OrderCanceledEvent
{
OrderID = request.OrderID,
UserID = request.UserID,
CreatedOn = (ulong)DateTime.UtcNow.Ticks,
ActivityID = Guid.NewGuid().ToString(),
};
if (eventEmitter.EmitOrderCanceledEvent(evt))
{
result.ConfirmationCode = Guid.NewGuid().ToString();
result.Canceled = true;
foreach (var li in originalOrder.LineItems)
{
eventEmitter.EmitInventoryReleasedEvent(new InventoryReleasedEvent
{
SKU = li.SKU,
ReleasedOn = (ulong)DateTime.UtcNow.Ticks,
Quantity = li.Quantity,
OrderID = request.OrderID,
UserID = request.UserID,
EventID = Guid.NewGuid().ToString()
});
}
}
else
{
result.Canceled = false;
}
return(Task.FromResult(result));
}
catch (Exception ex)
{
Console.WriteLine($"Failed to handle order cancellation {ex.ToString()}");
result.Canceled = false;
return(Task.FromResult(result));
}
}
public bool EmitOrderCanceledEvent(OrderCanceledEvent evt)
{
try
{
var options = new KafkaOptions(new Uri("http://localhost:9092"));
var router = new BrokerRouter(options);
var client = new Producer(router);
string messageJson = JsonConvert.SerializeObject(evt);
Console.WriteLine($"Emitting order canceled event for order {evt.OrderID}");
client.SendMessageAsync(CANCELED_TOPIC, new[] { new Message(messageJson) }).Wait();
return(true);
}
catch (Exception ex)
{
Console.WriteLine($"Failed to emit order canceled event {ex.ToString()}");
return(false);
}
}