private IScheduledTask ScheduleInternal(TimeSpan initialDelay, TimeSpan period,
Func <CancellationToken, Task> action, Func <IFailureContext, CancellationToken, Task> onException,
TimeSpan maxBackoffPeriod)
{
SchedulerAssertions.Assert(initialDelay, period, action, onException, maxBackoffPeriod);
var cancellationTokenSource = new CancellationTokenSource();
var cancellationToken = cancellationTokenSource.Token;
var task = Task.Run(async() =>
{
using (cancellationTokenSource)
{
var failureContext = new FailureContext(period, maxBackoffPeriod, () => Now);
if (initialDelay > TimeSpan.Zero)
{
await Task.Delay(initialDelay, cancellationToken);
await CallAction(action, onException, cancellationToken, failureContext);
}
while (!cancellationToken.IsCancellationRequested)
{
await Task.Delay(failureContext.CurrentPeriod, cancellationToken);
await CallAction(action, onException, cancellationToken, failureContext);
}
}
}, cancellationToken);
return(new ScheduledTask(task, cancellationTokenSource));
}
private IScheduledTask ScheduleInternal(TimeSpan initialDelay, TimeSpan period,
Func <CancellationToken, Task> action, Func <IFailureContext, CancellationToken, Task> onException,
TimeSpan maxBackoffPeriod)
{
SchedulerAssertions.Assert(initialDelay, period, action, onException, maxBackoffPeriod);
var t = new TestScheduledTask(Now.Add(initialDelay), period, action, onException,
maxBackoffPeriod, () => Now);
_timers.TryAdd(t, null);
return(t);
}