public async Task RunAsync(CancellationToken cancellationToken)
{
_externalCancellationToken = cancellationToken;
_externalCancellationToken.Register(() => _localCancellationTokenSource.Cancel());
List <Guid> lowestIds = new List <Guid>();
while (!cancellationToken.IsCancellationRequested)
{
var lowestNextTimeToRun = GetScheduledTasksToRunAndHowLongToWait(lowestIds);
var timeToWait = lowestNextTimeToRun.Subtract(_cronDateTimeService.GetNow());
var continueExecution = await Task.Delay((int)Math.Min(int.MaxValue, timeToWait.TotalMilliseconds), _localCancellationTokenSource.Token).ContinueWith(task =>
{
if (cancellationToken.IsCancellationRequested)
{
return(false);
}
return(true);
});
if (!continueExecution)
{
return;
}
var startTime = _cronDateTimeService.GetNow();
foreach (var scheduledTask in _scheduledTasks.Where(m => lowestIds.Contains(m.Id)))
{
if (_localCancellationTokenSource.IsCancellationRequested)
{
break;
}
try
{
if (scheduledTask.Action is object)
{
scheduledTask.Action.Invoke(_localCancellationTokenSource.Token);
}
if (scheduledTask.ActionTask is object)
{
await scheduledTask.ActionTask.Invoke(_localCancellationTokenSource.Token);
}
}
catch (Exception e)
{
_logger.LogError(e, "Failed to execute action");
}
}
if (_cronDateTimeService.GetNow() - startTime > MINUTE)
{
_logger.LogWarning("Execution took more than one minute");
}
}
}
public DateTime?GetNextTimeToRun()
{
var now = _cronDateTimeService.GetNow();
return(PrivateGetNextTimeToRun(now));
}