public static void StartRunningProcesses()
{
if (running)
{
throw new InvalidOperationException("ProcessLogic is running");
}
using (ExecutionContext.SuppressFlow())
Task.Factory.StartNew(() =>
{
var database = Schema.Current.Table(typeof(ProcessEntity)).Name.Schema?.Database;
SystemEventLogLogic.Log("Start ProcessRunner");
ExceptionEntity?exception = null;
using (AuthLogic.Disable())
{
try
{
running = true;
(from p in Database.Query <ProcessEntity>()
where p.IsMine() && (p.State == ProcessState.Executing || p.State == ProcessState.Suspending || p.State == ProcessState.Suspended) ||
p.IsShared() && p.State == ProcessState.Suspended
select p).SetAsQueued();
CancelNewProcesses = new CancellationTokenSource();
autoResetEvent.Set();
timerNextExecution = new Timer(ob => WakeUp("TimerNextExecution", null), // main timer
null,
Timeout.Infinite,
Timeout.Infinite);
if (!CacheLogic.WithSqlDependency)
{
timerPeriodic = new Timer(ob => WakeUp("TimerPeriodic", null), null, PoolingPeriodMilliseconds, PoolingPeriodMilliseconds);
}
while (autoResetEvent.WaitOne())
{
if (CancelNewProcesses.IsCancellationRequested)
{
return;
}
using (HeavyProfiler.Log("PWL", () => "Process Runner"))
{
(from p in Database.Query <ProcessEntity>()
where p.State == ProcessState.Planned && p.PlannedDate <= Clock.Now
select p).SetAsQueued();
var list = Database.Query <ProcessEntity>()
.Where(p => p.IsMine() || p.IsShared())
.Where(p => p.State == ProcessState.Planned)
.Select(p => p.PlannedDate)
.ToListWakeup("Planned dependency");
SetNextPannedExecution(list.Min());
lock (executing)
{
int remaining = MaxDegreeOfParallelism - executing.Count;
if (remaining > 0)
{
retry:
var queued = Database.Query <ProcessEntity>()
.Where(p => p.State == ProcessState.Queued)
.Where(p => p.IsMine() || p.IsShared())
.Select(a => new { Process = a.ToLite(), a.QueuedDate, a.MachineName })
.ToListWakeup("Planned dependency");
var afordable = queued
.OrderByDescending(p => p.MachineName == Environment.MachineName)
.OrderBy(a => a.QueuedDate)
.Take(remaining).ToList();
var taken = afordable.Where(p => p.MachineName == ProcessEntity.None).Select(a => a.Process).ToList();
if (taken.Any())
{
using (var tr = Transaction.ForceNew())
{
Database.Query <ProcessEntity>()
.Where(p => taken.Contains(p.ToLite()) && p.MachineName == ProcessEntity.None)
.UnsafeUpdate()
.Set(p => p.MachineName, p => Environment.MachineName)
.Set(p => p.ApplicationName, p => Schema.Current.ApplicationName)
.Execute();
tr.Commit();
}
goto retry;
}
foreach (var pair in afordable)
{
ProcessEntity pro = pair.Process !.RetrieveAndRemember();
IProcessAlgorithm algorithm = ProcessLogic.GetProcessAlgorithm(pro.Algorithm);
ExecutingProcess executingProcess = new ExecutingProcess(algorithm, pro);
executing.Add(pro.ToLite(), executingProcess);
executingProcess.TakeForThisMachine();
using (ExecutionContext.SuppressFlow())
Task.Run(() =>
{
try
{
executingProcess.Execute();
}
catch (Exception ex)
{
try
{
ex.LogException(edn =>
{
edn.ControllerName = "ProcessWorker";
edn.ActionName = executingProcess.CurrentProcess.ToLite().Key();
});
}
catch { }
}
finally
{
lock (executing)
{
executing.Remove(pro.ToLite());
WakeUp("Process ended", null);
}
}
});
}
var suspending = Database.Query <ProcessEntity>()
.Where(p => p.State == ProcessState.Suspending)
.Where(p => p.IsMine())
.Select(a => a.ToLite())
.ToListWakeup("Suspending dependency");
foreach (var s in suspending)
{
ExecutingProcess execProc = executing.GetOrThrow(s);
if (execProc.CurrentProcess.State != ProcessState.Finished)
{
execProc.CurrentProcess = s.RetrieveAndRemember();
execProc.CancelationSource.Cancel();
}
}
}
}
}
}
}
catch (ThreadAbortException)
{
//Ignore
}
catch (Exception e)
{
try
{
exception = e.LogException(edn =>
{
edn.ControllerName = "ProcessWorker";
edn.ActionName = "MainLoop";
});
}
catch { }
}
finally
{
lock (executing)
executing.Clear();
SystemEventLogLogic.Log("Stop ProcessRunner", exception);
running = false;
}
}
}, TaskCreationOptions.LongRunning);
}