private void RemoveFromInfos(JobRunInfo info)
{
if (info != null && _infos != null)
{
lock (_infos)
{
if (_infos.Contains(info))
{
_infos.Remove(info);
}
}
}
}
private void LaunchNextJob(CancellationToken ct, bool runNow)
{
if (Configuration.RunState == JobRunState.Automatic || runNow)
{
var info = new JobRunInfo(new Task <bool>(() => Execute(ct), ct));
info.StartTime = runNow ? DateTime.UtcNow : CalculateNextStartTime();
if (_infos != null)
{
lock (_infos)
{
_infos.Add(info);
}
}
Task.Run(() => Run(ct, info)); //does not block here on purpose
_logger.Log(string.Format("Job \"{0}\" has been setup to run.", Configuration.Name));
}
}
private async Task RunTask(JobRunInfo info)
{
if (info != null && info.Task != null)
{
var watch = new Stopwatch();
watch.Start();
bool rc = false;
try
{
info.Task.Start();
Status = JobStatus.Running;
info.IsRunning = true;
rc = await info.Task;
}
catch (OperationCanceledException)
{
_logger.Log(string.Format("Job \"{0}\" canceled.", Configuration.Name), LogMessageSeverity.Warning);
}
catch (Exception ex)
{
_logger.Log(string.Format("Job \"{0}\" failed! Error - {1}.", Configuration.Name, ex.Message), LogMessageSeverity.Error);
}
watch.Stop();
info.CompletedSuccessfully = rc;
info.RunDuration = watch.Elapsed;
info.IsRunning = false;
Status = rc ? JobStatus.Success : JobStatus.Error;
string message = rc ? "completed successfully" : "failed to complete successfully";
_logger.Log(string.Format("Job \"{0}\" {1}, run time = {2:hh\\:mm\\:ss}", Configuration.Name, message, watch.Elapsed), rc ? LogMessageSeverity.Information : LogMessageSeverity.Error);
}
}
//a self relaunching scheduler
private async Task Run(CancellationToken ct, JobRunInfo info)
{
if (info != null)
{
if (Status != JobStatus.Misconfigured)
{
try
{
_logger.Log(string.Format(string.Format("Job \"{0}\" scheduled to start \"{1}\"", Configuration.Name, info.StartTime.ToLocalTime())));
WaitTillDoneOrThrow(ct, info.StartTime); //wait till it's time, while checking for cancel token
_logger.Log(string.Format(string.Format("Job \"{0}\" starting at \"{1}\"", Configuration.Name, DateTime.UtcNow.ToLocalTime())));
bool willRun = !HasRunningTask() || Configuration.AllowSimultaneousExecutions;
if (!willRun && Configuration.RunImmediatelyIfRunTimeMissed)
{
_logger.Log(string.Format("Job \"{0}\" missed scheduled execution window, will run immediately after currently executing job.", Configuration.Name), LogMessageSeverity.Warning);
Task <bool>[] tasks = null;
if (_infos != null)
{
lock (_infos)
{
tasks = _infos.Where(j => j.IsRunning).Select(j => j.Task).ToArray();
}
}
if (tasks != null)
{
if (tasks.Count() > 0)
{
Task.WaitAll(tasks); //blocks till all the tasks are done
}
}
willRun = true;
}
LaunchNextJob(ct, false); //launch the next job no matter what
if (willRun)
{
await RunTask(info); //actually run it!
}
else
{
_logger.Log(string.Format("Job \"{0}\" missed scheduled execution window.", Configuration.Name), LogMessageSeverity.Warning);
}
}
catch (OperationCanceledException)
{
_logger.Log(string.Format("The scheduled job, \"{0}\", has been canceled prior to execution.", Configuration.Name), LogMessageSeverity.Warning);
}
catch (Exception ex)
{
_logger.Log(string.Format("The scheduled job, \"{0}\", has encountered an error prior to execution - {1}.", Configuration.Name, ex.Message), LogMessageSeverity.Error);
}
}
else
{
_logger.Log(string.Format("Job \"{0}\" cannot run because it is misconfigured...", Configuration.Name), LogMessageSeverity.Error);
}
RemoveFromInfos(info); //need to remove here no matter what, success, failure, cancel, exception, missed window, etc
}
}