private void Execute()
{
// get a manager for the scheduler
YetaWFManager.MakeInitialThreadInstance(null);
// TODO: Scheduler logging should not start during startup processing. This timer postpones it (but is not a good solution)
// Because initialization is called during application startup, we'll wait before we
// check for any scheduler items that may be due (just so app start isn't all too slow).
try {
Thread.Sleep(defaultStartupTimeSpan);
} catch (ThreadInterruptedException) {
// thread was interrupted because there is work to be done
}
SchedulerLog = new SchedulerLogging();
SchedulerLog.Init();
SchedulerLog.LimitTo(YetaWFManager.Manager);
YetaWFManager.Syncify(async() => { // there is no point in running the scheduler async
await Logging.RegisterLoggingAsync(SchedulerLog);
});
Logging.AddTraceLog("Scheduler task started");
// mark all scheduled items that are supposed to be run at application startup
try {
YetaWFManager.Syncify(async() => { // there is no point in running the scheduler async
await RunStartupItemsAsync();
});
} catch (Exception exc) {
Logging.AddErrorLog("An error occurred running startup items", exc);
}
for (;;)
{
TimeSpan delayTime = defaultTimeSpanNoTask;
if (SchedulerSupport.Enabled)
{
try {
YetaWFManager.Syncify(async() => { // there is no point in running the scheduler async
delayTime = await RunItemsAsync();
});
} catch (Exception exc) {
delayTime = defaultTimeSpanError;
Logging.AddErrorLog("An error occurred in the scheduling loop.", exc);
}
if (delayTime < new TimeSpan(0, 0, 5))// at a few seconds
{
delayTime = new TimeSpan(0, 0, 5);
}
else if (delayTime > new TimeSpan(1, 0, 0, 0)) // max. 1 day
{
delayTime = new TimeSpan(1, 0, 0, 0);
}
}
try {
schedulingThreadRunning = false;
Logging.AddLog($"Waiting {delayTime}");
Thread.Sleep(delayTime);
} catch (ThreadInterruptedException) {
// thread was interrupted because there is work to be done
} catch (ThreadAbortException) { }
finally {
schedulingThreadRunning = true;
}
}
// This never really ends so we don't need to unregister logging
//log.Shutdown();
//Logging.UnregisterLogging(log);
}