/// <summary>
/// Checks if a device polling session of the device is required.
/// </summary>
private bool CheckSessionIsRequired(DeviceLogic deviceLogic, DateTime utcNow)
{
PollingOptions pollingOptions = deviceLogic.PollingOptions;
bool timeIsSet = pollingOptions.Time > TimeSpan.Zero;
bool periodIsSet = pollingOptions.Period > TimeSpan.Zero;
if (timeIsSet || periodIsSet)
{
DateTime localNow = utcNow.ToLocalTime();
DateTime nowDate = localNow.Date;
TimeSpan nowTime = localNow.TimeOfDay;
DateTime lastSessionDate = deviceLogic.LastSessionTime.Date;
TimeSpan lastSessionTime = deviceLogic.LastSessionTime.TimeOfDay;
if (periodIsSet)
{
// periodic polling
double timeInSec = pollingOptions.Time.TotalSeconds;
double periodInSec = pollingOptions.Period.TotalSeconds;
int n = (int)((nowTime.TotalSeconds - timeInSec) / periodInSec) + 1;
return(pollingOptions.Time <= nowTime /*time to poll*/ &&
(lastSessionTime.TotalSeconds <= n * periodInSec + timeInSec ||
lastSessionTime > nowTime /*session was yesterday*/));
}
else if (timeIsSet)
{
// polling once a day at a specified time
return(pollingOptions.Time <= nowTime /*time to poll*/ &&
(lastSessionDate < nowDate || lastSessionTime < pollingOptions.Time /*after an extra poll*/));
}
}
// continuous cyclic polling
return(true);
}
public ClockPollingService(PollingOptions options, ClockServer server)
{
Options = options;
Server = server;
}
/// <summary>
/// Gets the default polling options for the device.
/// </summary>
public virtual PollingOptions GetPollingOptions()
{
return(PollingOptions.CreateDefault());
}
