private void RescheduleRecurringTask(RunningTask runningTask)
{
// Note: it's important to start possible recurring tasks outside the loop
var scheduledTask = runningTask.ScheduledTask;
if (scheduledTask.Recurring.HasValue)
{
// Note: we might have overridden the interval in the clone, so we need to clone it first
var newScheduledTask = scheduledTask.Clone();
var startDate = _timeService.CurrentDateTime;
if (newScheduledTask.Recurring.HasValue)
{
// Use new recurring value
startDate = startDate.Add(newScheduledTask.Recurring.Value);
}
else
{
// Use old recurring value
startDate = startDate.Add(scheduledTask.Recurring.Value);
}
Log.Debug($"Task {scheduledTask} is a recurring task, rescheduling a copy at '{startDate}'");
newScheduledTask.Start = startDate;
AddScheduledTask(newScheduledTask);
}
}
private void OnRunningTaskCompleted(Task task)
{
RunningTask runningTask = null;
CancellationTokenSource cancellationTokenSource = null;
var cancellationToken = default(CancellationToken);
var exception = task.Exception;
var stringBuilder = new StringBuilder();
stringBuilder.AppendLine($"Task completed, searching for existing running task");
stringBuilder.AppendLine($" * Canceled: {task.IsCanceled}");
stringBuilder.AppendLine($" * Completed: {task.IsCompleted}");
stringBuilder.AppendLine($" * Faulted: {task.IsFaulted}");
stringBuilder.AppendLine($" * Exception: {exception}");
Log.Debug(stringBuilder.ToString());
lock (_lock)
{
for (var i = 0; i < _runningTasks.Count; i++)
{
var possibleRunningTask = _runningTasks[i];
if (ReferenceEquals(possibleRunningTask.Task, task))
{
runningTask = possibleRunningTask.RunningTask;
_runningTasks.RemoveAt(i);
cancellationTokenSource = possibleRunningTask.RunningTask.CancellationTokenSource;
cancellationToken = cancellationTokenSource.Token;
cancellationTokenSource.Dispose();
break;
}
}
}
if (runningTask is not null)
{
Log.Debug($"Found task '{runningTask}' for the completed task");
if (runningTask.ScheduledTask.ScheduleRecurringTaskAfterTaskExecutionHasCompleted)
{
RescheduleRecurringTask(runningTask);
}
if (!task.IsCanceled && !cancellationTokenSource.IsCancellationRequested &&
!_cancelledTokenSources.Contains(cancellationToken))
{
TaskCompleted?.Invoke(this, new TaskEventArgs(runningTask));
}
}
}
private bool StartTask(IScheduledTask scheduledTask)
{
lock (_lock)
{
if (!IsEnabled)
{
return(false);
}
Log.Debug("Starting task {0}", scheduledTask);
var runningTask = new RunningTask(scheduledTask, _timeService.CurrentDateTime);
#pragma warning disable 4014
// Note: don't await, we are a scheduler.
var task = TaskShim.Run(async() => await scheduledTask.InvokeAsync(), runningTask.CancellationTokenSource.Token);
task.ContinueWith(OnRunningTaskCompleted);
#pragma warning restore 4014
Log.Debug("Started task {0}", scheduledTask);
var completed = task.IsCompleted;
if (completed)
{
// Shortcut mode
TaskStarted.SafeInvoke(this, new TaskEventArgs(runningTask));
OnRunningTaskCompleted(task);
}
else
{
_runningTasks.Add(new RunningTaskInfo(task, runningTask));
TaskStarted.SafeInvoke(this, new TaskEventArgs(runningTask));
}
}
// Note: it's important to start possible recurring tasks outside the loop
if (scheduledTask.Recurring.HasValue)
{
var startDate = _timeService.CurrentDateTime.Add(scheduledTask.Recurring.Value);
Log.Debug("Task {0} is a recurring task, rescheduling a copy at '{1}'", scheduledTask, startDate);
var newScheduledTask = (IScheduledTask)scheduledTask.Clone();
newScheduledTask.Start = startDate;
AddScheduledTask(newScheduledTask);
}
return(true);
}
public static bool IsExpired(this RunningTask runningTask, ITimeService timeService)
{
Argument.IsNotNull(() => runningTask);
Argument.IsNotNull(() => timeService);
var duration = timeService.CurrentDateTime - runningTask.Started;
if (duration > runningTask.ScheduledTask.MaximumDuration)
{
return(true);
}
return(false);
}
private void StartTask(IScheduledTask scheduledTask)
{
Task task = null;
RunningTask runningTask = null;
lock (_lock)
{
if (!IsEnabled)
{
return;
}
Log.Debug($"Starting task {scheduledTask}");
runningTask = new RunningTask(scheduledTask, _timeService.CurrentDateTime);
#pragma warning disable 4014
// Note: don't await, we are a scheduler
task = TaskShim.Run(async() => await scheduledTask.InvokeAsync(), runningTask.CancellationTokenSource.Token);
task.ContinueWith(OnRunningTaskCompleted);
#pragma warning restore 4014
Log.Debug($"Started task {scheduledTask}");
}
if (!scheduledTask.ScheduleRecurringTaskAfterTaskExecutionHasCompleted)
{
// Schedule immediately, even though task is still running
RescheduleRecurringTask(runningTask);
}
var completed = task.IsCompleted;
if (completed)
{
// Shortcut mode
TaskStarted?.Invoke(this, new TaskEventArgs(runningTask));
OnRunningTaskCompleted(task);
}
else
{
_runningTasks.Add(new RunningTaskInfo(task, runningTask));
TaskStarted?.Invoke(this, new TaskEventArgs(runningTask));
}
}
private void TerminateTask(RunningTask runningTask)
{
Log.Debug($"Terminating task {runningTask}");
lock (_lock)
{
for (var i = 0; i < _runningTasks.Count; i++)
{
if (ReferenceEquals(_runningTasks[i].RunningTask, runningTask))
{
_cancelledTokenSources.Add(runningTask.CancellationTokenSource.Token);
runningTask.CancellationTokenSource.Cancel();
TaskCanceled?.Invoke(this, new TaskEventArgs(runningTask));
return;
}
}
}
}
public TaskEventArgs(RunningTask runningTask)
{
Argument.IsNotNull(() => runningTask);
RunningTask = runningTask;
}
public RunningTaskInfo(Task task, RunningTask runningTask)
{
Task = task;
RunningTask = runningTask;
}
public RunningTaskInfo(Task task, RunningTask runningTask)
{
Task = task;
RunningTask = runningTask;
}
private void TerminateTask(RunningTask runningTask)
{
Log.Debug("Terminating task {0}", runningTask);
lock (_lock)
{
for (int i = 0; i < _runningTasks.Count; i++)
{
if (ReferenceEquals(_runningTasks[i].RunningTask, runningTask))
{
_cancelledTokenSources.Add(runningTask.CancellationTokenSource.Token);
runningTask.CancellationTokenSource.Cancel();
TaskCanceled.SafeInvoke(this, new TaskEventArgs(runningTask));
return;
}
}
}
}
private bool StartTask(IScheduledTask scheduledTask)
{
lock (_lock)
{
if (!IsEnabled)
{
return false;
}
Log.Debug("Starting task {0}", scheduledTask);
var runningTask = new RunningTask(scheduledTask, _timeService.CurrentDateTime);
#pragma warning disable 4014
// Note: don't await, we are a scheduler.
var task = TaskShim.Run(async () => await scheduledTask.InvokeAsync(), runningTask.CancellationTokenSource.Token);
task.ContinueWith(OnRunningTaskCompleted);
#pragma warning restore 4014
Log.Debug("Started task {0}", scheduledTask);
var completed = task.IsCompleted;
if (completed)
{
// Shortcut mode
TaskStarted.SafeInvoke(this, new TaskEventArgs(runningTask));
OnRunningTaskCompleted(task);
}
else
{
_runningTasks.Add(new RunningTaskInfo(task, runningTask));
TaskStarted.SafeInvoke(this, new TaskEventArgs(runningTask));
}
}
// Note: it's important to start possible recurring tasks outside the loop
if (scheduledTask.Recurring.HasValue)
{
var startDate = _timeService.CurrentDateTime.Add(scheduledTask.Recurring.Value);
Log.Debug("Task {0} is a recurring task, rescheduling a copy at '{1}'", scheduledTask, startDate);
var newScheduledTask = (IScheduledTask)scheduledTask.Clone();
newScheduledTask.Start = startDate;
AddScheduledTask(newScheduledTask);
}
return true;
}
