private async Task Run(string deviceId)
{
var connectionString = ConfigurationManager.ConnectionStrings["TemperatureDb"].ConnectionString;
while (true)
{
using (TemperatureReadingContext context = new TemperatureReadingContext(connectionString))
{
try
{
var reading = context.Readings.Where(t => t.DeviceId == deviceId)
.OrderByDescending(t => t.EndTime).First();
_hubContext.Clients.Group(deviceId).pump(reading);
}
catch (Exception ex)
{
System.Diagnostics.Trace.TraceError(ex.Message);
if (ex.InnerException != null)
{
System.Diagnostics.Trace.TraceError(ex.InnerException.Message);
}
}
}
await Task.Delay(1000);
}
}
private async Task RunAsync(CancellationToken cancellationToken)
{
var temperatureDbConnectionString = CloudConfigurationManager.GetSetting("TemperatureDbConnectionString");
var notificationEndpoint = CloudConfigurationManager.GetSetting("NotificationUri");
var heater = new HeaterCommunication();
var temperatureSensor = new DeviceReliabilityServiceClient(DeviceReliabilityServiceClient.FailAction.Reliable);
while (true)
{
var correlationId = Guid.NewGuid().ToString("n");
var heaterStatus = heater.Query(correlationId);
if (heaterStatus == HeaterStatus.UNKNOWN)
{
Trace.TraceInformation("The Heater is in an unknown state. Looping to retry acquisition of device status");
continue;
}
using (TemperatureReadingContext temperatureDb = new TemperatureReadingContext(temperatureDbConnectionString))
{
//get the most recent entry
var tempReading = temperatureDb.Readings.OrderByDescending(t => t.StartTime).First();
// Call AzureML to determine whether the temperature reading is in an acceptable range
var reliable = await temperatureSensor.IsDeviceReliable(correlationId, tempReading.Temperature);
if (!reliable)
{
Trace.TraceInformation("The Temperature reading of {0} is outside the ML calculated cluster of accuracy. Looping to await a different reading.", tempReading.Temperature);
continue;
}
if (tempReading.Temperature >= 22)
{
if (heaterStatus == HeaterStatus.ON)
{
heater.TurnOff(correlationId);
NotifyWebUi(notificationEndpoint, false);
}
}
else if (tempReading.Temperature <= 20)
{
if (heaterStatus == HeaterStatus.OFF)
{
heater.TurnOn(correlationId);
NotifyWebUi(notificationEndpoint, true);
}
}
}
await Task.Delay(5000);//temperature is recorded at a freshness hertz of 60 seconds, check twice as frequently
}
}
public TemperatureReadingController(TemperatureReadingContext context)
{
_context = context;
}
