public static TaskParameter Periodic(string name, int startSec, int periodSec, Action<TaskServer, string> proc)
{
var param = new TaskParameter();
param.Name = name;
param.StartSec = startSec;
param.PeriodSec = periodSec;
param.ReleaseCount = -1;
param.Proc = proc;
return param;
}
// thread safe
public void RegisterTask(TaskParameter taskParam)
{
Log.Trace.TraceEvent(TraceEventType.Information, 0,
"[{0}] Register task ({1}sec, T={2}, count={3})",
taskParam.Name, taskParam.StartSec, taskParam.PeriodSec, taskParam.ReleaseCount);
// to be released from release thread
Action taskProc = () =>
{
// get semaphore and do Proc()
bool enter = taskSema.Wait(0);
if (!enter)
{
// Max count tasks are running, give up
Log.Trace.TraceEvent(TraceEventType.Warning, 0, "[{0}] Task count full, give up", taskParam.Name);
return;
}
try
{
Log.Trace.TraceEvent(TraceEventType.Information, 0, "[{0}] Start", taskParam.Name);
taskParam.Proc(this, taskParam.Name);
Log.Trace.TraceEvent(TraceEventType.Information, 0, "[{0}] Completed successfully", taskParam.Name);
}
catch (OperationCanceledException)
{
Log.Trace.TraceEvent(TraceEventType.Information, 0, "[{0}] Task cancelled", taskParam.Name);
}
catch (Exception e)
{
Log.Trace.TraceEvent(TraceEventType.Information, 0, "[{0}] Exception", taskParam.Name);
Log.Trace.TraceData(TraceEventType.Error, 0, e);
}
finally
{
taskSema.Release();
}
};
// release thread, which releases releaseProc
Task.Run(() =>
{
try
{
// delay, using CencelToken
Task.Delay(taskParam.StartSec * 1000).Wait(CancelToken);
int count = 0;
while (taskParam.ReleaseCount < 0 || count < taskParam.ReleaseCount)
{
// release task
Task.Run(taskProc);
// delay, using CencelToken
Task.Delay(taskParam.PeriodSec * 1000).Wait(CancelToken);
if (taskParam.ReleaseCount >= 0)
{
count++;
}
}
}
catch (OperationCanceledException)
{
Log.Trace.TraceEvent(TraceEventType.Information, 0, "[{0}-release-thread] Task cancelled", taskParam.Name);
}
catch (Exception e)
{
Log.Trace.TraceEvent(TraceEventType.Information, 0, "[{0}-release-thread] Exception", taskParam.Name);
Log.Trace.TraceData(TraceEventType.Error, 0, e);
}
});
}