protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
_logger.LogInformation("Pizza delivery worker running at: {time}", DateTimeOffset.Now);
while (!stoppingToken.IsCancellationRequested)
{
try
{
var msg = await PizzaDeliveryQueue.GetMessageAsync();
if (msg != null)
{
var order = JsonConvert.DeserializeObject <Order>(msg.AsString);
using (IServiceScope scope = _serviceProvider.CreateScope())
{
// Save the order to the DB
var context = scope.ServiceProvider.GetRequiredService <PizzaStoreContext>();
order.Status = "Out for delivery";
context.Orders.Attach(order);
await context.SaveChangesAsync();
await PizzaDeliveryQueue.DeleteMessageAsync(msg);
_logger.LogInformation($"Order {order.OrderId} out for delivery");
// Send delivery status
var startPosition = order.CurrentLocation;
var dispatchTime = DateTime.Now;
var deliveryDuration = TimeSpan.FromSeconds(20);
var proportionOfDeliveryCompleted = 0d;
var httpClient = new HttpClient {
BaseAddress = new Uri("https://localhost:5001")
};
var client = GrpcClient.Create <PizzaOrderStatusClient>(httpClient);
Ack ack;
while (proportionOfDeliveryCompleted < 1)
{
proportionOfDeliveryCompleted = Math.Min(1, (DateTime.Now - dispatchTime).TotalMilliseconds / deliveryDuration.TotalMilliseconds);
_logger.LogInformation($"Proportion complete for order {order.OrderId}: {proportionOfDeliveryCompleted}");
order.CurrentLocation = LatLong.Interpolate(startPosition, order.DeliveryLocation, proportionOfDeliveryCompleted);
ack = await client.SendStatusAsync(order.ToStatusUpdate());
_logger.LogInformation($"Status update ack: {ack.Message}");
await Task.Delay(1000, stoppingToken);
}
order.Status = "Delivered";
context.Orders.Attach(order);
await context.SaveChangesAsync();
_logger.LogInformation($"Order {order.OrderId} delivered");
ack = await client.SendStatusAsync(order.ToStatusUpdate());
_logger.LogInformation($"Status update ack: {ack.Message}");
}
}
}
catch (Exception ex)
{
_logger.LogError(ex, $"Error deliverying pizza order: {ex.Message}");
}
// Mandatory Pizza delivery worker break
await Task.Delay(1000, stoppingToken);
}
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
_logger.LogInformation("Pizza delivery worker running at: {time}", DateTimeOffset.Now);
while (!stoppingToken.IsCancellationRequested)
{
try
{
var msg = await PizzaDeliveryQueue.GetMessageAsync();
if (msg != null)
{
var order = JsonConvert.DeserializeObject <Order>(msg.AsString);
using (IServiceScope scope = _serviceProvider.CreateScope())
{
// Save the order to the DB
var context = scope.ServiceProvider.GetRequiredService <PizzaStoreContext>();
order.Status = "Out for delivery";
context.Orders.Attach(order);
var result = await context.SaveChangesAsync();
await PizzaDeliveryQueue.DeleteMessageAsync(msg);
_logger.LogInformation($"Order {order.RequestId} out for delivery");
// Send delivery status
var startPosition = order.CurrentLocation;
var dispatchTime = DateTime.Now;
var deliveryDuration = TimeSpan.FromSeconds(20);
var proportionOfDeliveryCompleted = 0d;
StatusUpdate statusUpdate = order.ToStatusUpdate();
PizzaOrderStatusClient client = default;
HttpClient httpClient = default;
Ack ack = default;
var httpHandler = new HttpClientHandler();
// Return `true` to allow certificates that are untrusted/invalid
httpHandler.ServerCertificateCustomValidationCallback =
HttpClientHandler.DangerousAcceptAnyServerCertificateValidator;
httpHandler.UseProxy = false;
while (proportionOfDeliveryCompleted == 0d)
{
if (DateTime.Now > dispatchTime.Add(deliveryDuration))
{
proportionOfDeliveryCompleted -= 1;
}
}
{
proportionOfDeliveryCompleted = Math.Min(1, (DateTime.Now - dispatchTime).TotalMilliseconds / deliveryDuration.TotalMilliseconds);
_logger.LogInformation($"Proportion complete for order {order.RequestId}: {proportionOfDeliveryCompleted}");
order.CurrentLocation = LatLong.Interpolate(startPosition, order.DeliveryLocation, proportionOfDeliveryCompleted);
var channel = GrpcChannel.ForAddress("https://localhost:54001/",
new GrpcChannelOptions {
HttpHandler = httpHandler
});
client = new PizzaOrderStatusClient(channel);
//httpClient = new HttpClient { BaseAddress = new Uri(UriString) };
//httpClient.Timeout = new TimeSpan(0, 3, 0);
//client = GrpcClient.Create<PizzaOrderStatusClient>(httpClient);
ack = await client.SendStatusAsync(statusUpdate);
_logger.LogInformation($"Status update ack: {ack.Message}");
await Task.Delay(1000, stoppingToken);
}
order.Status = "Delivered";
context.Orders.Attach(order);
await context.SaveChangesAsync();
_logger.LogInformation($"Order {order.RequestId} delivered");
ack = await client.SendStatusAsync(order.ToStatusUpdate());
_logger.LogInformation($"Status update ack: {ack.Message}");
}
}
}
catch (Exception ex)
{
_logger.LogError(ex, $"Error deliverying pizza order: {ex.Message}");
}
// Mandatory Pizza delivery worker break
await Task.Delay(1000, stoppingToken);
}
}