static async Task <int> MainAsync()
{
Console.WriteLine("SampleModule Main() started.");
var appSettings = ConfigurationManager.AppSettings;
if (!TimeSpan.TryParse(appSettings["MessageDelay"], out messageDelay))
{
messageDelay = TimeSpan.FromSeconds(5);
}
int messageCount;
if (!int.TryParse(Environment.GetEnvironmentVariable(MessageCountConfigKey), out messageCount))
{
if (!int.TryParse(appSettings[MessageCountConfigKey], out messageCount))
{
messageCount = -1;
}
}
var simulatorParameters = SimulatorParameters.Create();
ModuleClient moduleClient = await ModuleUtil.CreateModuleClientAsync(
TransportType.Amqp_Tcp_Only,
ModuleUtil.DefaultTimeoutErrorDetectionStrategy,
ModuleUtil.DefaultTransientRetryStrategy);
await moduleClient.OpenAsync();
await moduleClient.SetMethodHandlerAsync("reset", ResetMethod, null);
await moduleClient.SetMethodHandlerAsync("ping", PingMethod, null);
(CancellationTokenSource cts, ManualResetEventSlim completed, Option <object> handler) = ShutdownHandler.Init(TimeSpan.FromSeconds(5), null);
Twin currentTwinProperties = await moduleClient.GetTwinAsync();
Console.WriteLine("Initialized Twin State Received");
if (currentTwinProperties.Properties.Desired.Contains(SendIntervalConfigKey))
{
Console.WriteLine("SendInterval: " + currentTwinProperties.Properties.Desired[SendIntervalConfigKey]);
var desiredInterval = (int)currentTwinProperties.Properties.Desired[SendIntervalConfigKey];
messageDelay = TimeSpan.FromSeconds(desiredInterval);
}
if (currentTwinProperties.Properties.Desired.Contains(EventCountConfigKey))
{
Console.WriteLine("EventCount: " + currentTwinProperties.Properties.Desired[EventCountConfigKey]);
var desiredCount = (int)currentTwinProperties.Properties.Desired[EventCountConfigKey];
eventCount = desiredCount;
}
if (currentTwinProperties.Properties.Desired.Contains(SendDataConfigKey))
{
Console.WriteLine("SendData: " + currentTwinProperties.Properties.Desired[SendDataConfigKey]);
sendData = (bool)currentTwinProperties.Properties.Desired[SendDataConfigKey];
if (!sendData)
{
Console.WriteLine("Sending data disabled. Change twin configuration to start sending again.");
}
}
ModuleClient userContext = moduleClient;
await moduleClient.SetDesiredPropertyUpdateCallbackAsync(OnDesiredPropertiesUpdated, userContext);
await moduleClient.SetInputMessageHandlerAsync("control", ControlMessageHandle, userContext);
await SendEvents(moduleClient, messageCount, simulatorParameters, cts);
await cts.Token.WhenCanceled();
completed.Set();
handler.ForEach(h => GC.KeepAlive(h));
Console.WriteLine("SampleModule Main() finished.");
return(0);
}
/// <summary>
/// Module behavior:
/// Sends data periodically (with default frequency of 5 seconds).
/// Data trend:
/// - Machine Temperature regularly rises from 21C to 100C in regularly with jitter
/// - Machine Pressure correlates with Temperature 1 to 10psi
/// - Ambient temperature stable around 21C
/// - Humidity is stable with tiny jitter around 25%
/// Method for resetting the data stream
/// </summary>
static async Task SendEvents(
ModuleClient moduleClient,
int messageCount,
SimulatorParameters sim,
CancellationTokenSource cts)
{
int count = 1;
double currentTemp = sim.TempMin;
double normal = (sim.PressureMax - sim.PressureMin) / (sim.TempMax - sim.TempMin);
while (!cts.Token.IsCancellationRequested && (SendUnlimitedMessages(messageCount) || messageCount >= count))
{
if (Reset)
{
currentTemp = sim.TempMin;
Reset.Set(false);
}
if (currentTemp > sim.TempMax)
{
currentTemp += Rnd.NextDouble() - 0.5; // add value between [-0.5..0.5]
}
else
{
currentTemp += -0.25 + (Rnd.NextDouble() * 1.5); // add value between [-0.25..1.25] - average +0.5
}
if (sendData)
{
var events = new List <MessageEvent> ();
// Add Desired Number of Events into the Message
for (int i = 0; i < eventCount; i++)
{
events.Add(new MessageEvent {
DeviceId = Environment.GetEnvironmentVariable("DEVICE") ?? Environment.MachineName,
TimeStamp = DateTime.UtcNow,
Temperature = new SensorReading {
Value = currentTemp,
Units = "degC",
Status = 200
},
Pressure = new SensorReading {
Value = sim.PressureMin + ((currentTemp - sim.TempMin) * normal),
Units = "psig",
Status = 200
},
SuctionPressure = new SensorReading {
Value = sim.PressureMin + 4 + ((currentTemp - sim.TempMin) * normal),
Units = "psig",
Status = 200
},
DischargePressure = new SensorReading {
Value = sim.PressureMin + 1 + ((currentTemp - sim.TempMin) * normal),
Units = "psig",
Status = 200
},
Flow = new SensorReading {
Value = Rnd.Next(78, 82),
Units = "perc",
Status = 200
}
});
currentTemp += -0.25 + (Rnd.NextDouble() * 1.5);
}
var msgBody = new MessageBody {
Asset = Environment.GetEnvironmentVariable("ASSET") ?? "whidbey",
Source = Environment.MachineName,
Events = events
};
string dataBuffer = JsonConvert.SerializeObject(msgBody);
var eventMessage = new Message(Encoding.UTF8.GetBytes(dataBuffer));
eventMessage.Properties.Add("sequenceNumber", count.ToString());
eventMessage.Properties.Add("batchId", BatchId.ToString());
Console.WriteLine($"\t{DateTime.Now.ToLocalTime()}> Sending message: {count}, Body: [{dataBuffer}]");
await moduleClient.SendEventAsync("temperatureOutput", eventMessage);
count++;
}
await Task.Delay(messageDelay, cts.Token);
}
if (messageCount < count)
{
Console.WriteLine($"Done sending {messageCount} messages");
}
}
