public async Task <SensorNotification> SimulateCustomerAsync(CancellationToken cancellationToken)
{
// simulate delay between customer movements
await SimulateDelay(cancellationToken);
// prevent event from being sent if properties have not been initialized (desired property)
if (!SensorId.HasValue || !MaxCapacity.HasValue)
{
Console.WriteLine($"{DateTime.Now.ToString("yyyyMMdd hh:mm:ss:ffffff")} - Sensor Id and/or MaxCapacity not set. Skipping event publication.");
return(new SensorNotification {
IsInitialized = false
});
}
Console.WriteLine($"{DateTime.Now.ToString("yyyyMMdd hh:mm:ss:ffffff")} - Customer detected. Sending message ...");
// determine notificationtype
NotificationType?notificationType = DetermineNotificationType();
if (notificationType == null)
{
return(new SensorNotification {
IsInitialized = false
});
}
//create event
SensorNotification e = new SensorNotification
{
DeviceId = _deviceId,
ModuleId = _moduleId,
SensorId = SensorId.Value,
MaxCapacity = MaxCapacity.Value,
NotificationType = notificationType.Value,
CustomerCount = _customerCount,
StoreStatus = StoreStatus
};
return(e);
}
/// <summary>
/// Message loop that simulates people entering the store.
/// </summary>
/// <param name="cancellationToken">The cancellation,token for gracefully handling cancellation.</param>
private static async Task MessageLoopAsync(CancellationToken cancellationToken)
{
int retryCount = 0;
while (!cancellationToken.IsCancellationRequested)
{
// simulate customer
SensorNotification notification = await _customersSimulation.SimulateCustomerAsync(cancellationToken);
// prevent event from being sent if module has not yet been initialized properly (desired property)
if (!notification.IsInitialized)
{
Log("Sensor module not yet initialized properly. Skipping event publication.");
continue;
}
try
{
Log("Customer entered. Sending message ...");
string messageString = JsonConvert.SerializeObject(notification);
var message = new Message(Encoding.UTF8.GetBytes(messageString));
// send event
await _moduleClient.SendEventAsync("sensorOutput", message);
Log($"Message sent: {messageString}");
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
retryCount++;
if (retryCount == 10)
{
break;
}
}
}
}