public async Task SendEventsAsync(CancellationToken token, Func <object, Task> sendMessageAsync)
{
while (!token.IsCancellationRequested)
{
var random = new Random();
switch (_currentState)
{
case PresenceStateType.SensingForPresence:
_logger.LogInfo("Sensing for presence {0}", DeviceId);
// Is there someone in front of the vending machine?
var randomNumber = random.Next(100);
if (randomNumber < PROBABILITY_OF_PRESENCE)
{
// Detected a customer is standing in front of the machine
_logger.LogInfo("Presence Started {0}", DeviceId);
// How long will the customer be in front of the machine?
_durationOfPresence = random.Next(SENSING_PERIOD_IN_SECONDS, MAX_DURATION_OF_PRESENCE);
_startedPresence = DateTime.Now;
_currentState = PresenceStateType.PresenceDetected;
}
else
{
// No presence detected
// Send a non-sensing telemetry event
await SendPresenceTelemetry(false, sendMessageAsync);
await Task.Delay(TimeSpan.FromSeconds(SENSING_PERIOD_IN_SECONDS), token);
}
break;
case PresenceStateType.PresenceDetected:
_logger.LogInfo("Sending presence packet {0}", DeviceId);
// Send a presence telemetry event
await SendPresenceTelemetry(true, sendMessageAsync);
// Have we passed the durationOfPresence?
if (DateTime.Now > _startedPresence.AddMilliseconds(_durationOfPresence * 1000))
{
_logger.LogInfo("Presence Ended {0}", DeviceId);
_currentState = PresenceStateType.SensingForPresence;
}
else
{
await Task.Delay(TimeSpan.FromSeconds(SENSING_PERIOD_IN_SECONDS), token);
}
break;
}
}
}
public async Task SendEventsAsync(CancellationToken token, Func<object, Task> sendMessageAsync)
{
while (!token.IsCancellationRequested)
{
var random = new Random();
switch (_currentState)
{
case PresenceStateType.SensingForPresence:
_logger.LogInfo("Sensing for presence {0}", DeviceId);
// Is there someone in front of the vending machine?
var randomNumber = random.Next(100);
if (randomNumber < PROBABILITY_OF_PRESENCE)
{
// Detected a customer is standing in front of the machine
_logger.LogInfo("Presence Started {0}", DeviceId);
// How long will the customer be in front of the machine?
_durationOfPresence = random.Next(SENSING_PERIOD_IN_SECONDS, MAX_DURATION_OF_PRESENCE);
_startedPresence = DateTime.Now;
_currentState = PresenceStateType.PresenceDetected;
}
else
{
// No presence detected
// Send a non-sensing telemetry event
await SendPresenceTelemetry(false, sendMessageAsync);
await Task.Delay(TimeSpan.FromSeconds(SENSING_PERIOD_IN_SECONDS), token);
}
break;
case PresenceStateType.PresenceDetected:
_logger.LogInfo("Sending presence packet {0}", DeviceId);
// Send a presence telemetry event
await SendPresenceTelemetry(true, sendMessageAsync);
// Have we passed the durationOfPresence?
if (DateTime.Now > _startedPresence.AddMilliseconds(_durationOfPresence * 1000))
{
_logger.LogInfo("Presence Ended {0}", DeviceId);
_currentState = PresenceStateType.SensingForPresence;
}
else
{
await Task.Delay(TimeSpan.FromSeconds(SENSING_PERIOD_IN_SECONDS), token);
}
break;
}
}
}
