private Task ScheduleNextAsync()
{
if (!_running)
{
return(Task.CompletedTask);
}
DateTimeOffset?next = _cronExpression.GetNextValidTimeAfter(DateTimeOffset.Now);
if (next.HasValue)
{
DateTime utc = next.Value.UtcDateTime;
DateTime now = DateTime.UtcNow;
TimeSpan span = utc - now;
if (!_running)
{
return(Task.CompletedTask);
}
_sub = _scheduler.Schedule(_action, span);
#if DEBUG
Console.WriteLine(span);
#endif
}
return(Task.CompletedTask);
}
/// <summary>
/// Schedule an action at a DateTime with an interval
/// </summary>
/// <param name="scheduler"></param>
/// <param name="action"></param>
/// <param name="when"></param>
/// <param name="interval"></param>
/// <returns></returns>
public static IDisposable Schedule(this IAsyncScheduler scheduler, Func <Task> action, DateTime when,
TimeSpan interval) =>
scheduler.Schedule(action, when - DateTime.Now, interval);
/// <summary> /// Schedule an action at a DateTime /// </summary> /// <param name="scheduler"></param> /// <param name="action"></param> /// <param name="when"></param> /// <returns></returns> public static IDisposable Schedule(this IAsyncScheduler scheduler, Func <Task> action, DateTime when) => scheduler.Schedule(action, when - DateTime.Now);
