public void AddTask(string taskName, TimeSpan initialInterval, Func <Task <TimeSpan> > tick)
{
TimeSchedulerTask task = new TimeSchedulerTask(taskName, initialInterval, tick);
if (currentTasks.ContainsKey(task.TaskName))
{
currentTasks.Remove(task.TaskName);
}
currentTasks.Add(task.TaskName, task);
}
//
// This is the main method in our thread - it looks to see which timers
// should be fired waiting a short while between each one....
///
///
private void TimeSchedulerRunner()
{
LogMessage("Scheduler thread is running");
bool workDone = false;
while (timerRunning_)
{
try
{
if (workDone == false)
{
Task.Delay(TimeSpan.FromSeconds(2)).Wait(); // We wait two seconds....
}
else
{
workDone = false;
}
long nowInSeconds = DateTime.UtcNow.Ticks / TimeSpan.TicksPerSecond;
TimeSchedulerTask task = GetNextTask();
if (task != null)
{
LogMessage("Checking time on task " + task.TaskName + " taskStartTime=" + task.TaskStartTime + " now=" + nowInSeconds);
if (task.TaskStartTime <= nowInSeconds)
{
workDone = true;
LogMessage("About to execute task " + task.TaskName);
currentTasks.Remove(task.TaskName); // Remove task from list - we are about to execute it...
// Ok....we should be running this task now...
Task <TimeSpan> func = task.InvokeFunction.Invoke();
if (func != null)
{
func.Wait();
if (func.IsFaulted)
{
LogMessage("Task " + task.TaskName + " faulted=" + func.Exception.Message + " stack=" + func.Exception.StackTrace);
}
//
// Now we need to re-schedule it....
//
if (!func.Result.Equals(STOP_TIMER))
{
task.SetNextStartTime(func.Result);
LogMessage("Rescheduling task " + task.TaskName + " for " + task.TaskStartTime);
currentTasks.Add(task.TaskName, task); // Put back onto queue for next time....
}
}
else
{
LogMessage("task " + task.TaskName + " returned null - will not be re-scheduled");
}
}
}
}
catch (Exception e)
{
LogMessage("Runner has errored - " + e.Message);
LogMessage("Stack=" + e.StackTrace);
if (e.InnerException != null)
{
LogMessage("InnerException=" + e.InnerException.StackTrace);
}
}
}
}