protected override void Execute(NativeActivityContext context)
{
DateTime expTime = this.ExpirationTime.Get(context);
// DurableTimerExtension.Register takes a TimeSpan so we use this method to convert between
// an the expired DateTime and how long of a delay to register for the timer
TimeSpan delay = expTime - DateTime.Now;
// If the input DateTime is already past due, then there is no need to register a timer.
if (delay > TimeSpan.Zero)
{
// Get the timer extension. Since we are asking for a type of TimerExtension and not specifically DurableTimerExtension,
// this activity could potentially be reused with a custom TimerExtension.
TimerExtension timerExtension = context.GetExtension <TimerExtension>();
// The bookmark that will be resumed when the timer expires
Bookmark bookmark = context.CreateBookmark(new BookmarkCallback(OnTimerExpired));
Console.WriteLine("AbsoluteDelay: Registering timer to expire at {0}", expTime.ToString());
timerExtension.RegisterTimer(delay, bookmark);
}
else
{
Console.WriteLine("AbsoluteDelay: Requested expiry time is already past due, skipping timer registration");
}
}
public static TimerExtension GetTimerExtension(this ActivityContext context)
{
TimerExtension timerExtension = context.GetExtension <TimerExtension>();
if (timerExtension == null)
{
throw new ValidationException(nameof(TimerExtension) + " is not found.");
}
return(timerExtension);
}
// The TimerExtensions support cancellation, so if this activity is canceled, propagate that signal to the TimerExtension
protected override void Cancel(NativeActivityContext context)
{
base.Cancel(context);
TimerExtension timerExtension = context.GetExtension <TimerExtension>();
Bookmark bookmark = this.timerExpiredBookmark.Get(context);
if (bookmark != null)
{
timerExtension.CancelTimer(bookmark);
}
}
