/// <summary>
/// Stops the specified workers.
/// </summary>
/// <param name="workers">The workers.</param>
public void Stop(List <IWorker> workers)
{
Guard.NotNull(() => workers, workers);
_waitForEventOrCancel.Set();
_waitForEventOrCancel.Cancel();
if (workers.Count == 0)
{
return;
}
//wait for workers to stop
WaitForDelegate.Wait(() => workers.Any(r => r.Running), _configuration.TimeToWaitForWorkersToStop);
if (workers.Any(r => r.Running))
{
workers.AsParallel().ForAll(w => w.AttemptToTerminate());
}
var alCancel = workers.Where(worker => worker.Running).ToList();
//attempt to cancel workers if any are still running
if (alCancel.Count > 0)
{
_cancelWorkSource.CancellationTokenSource.Cancel();
WaitForDelegate.Wait(() => alCancel.Any(r => r.Running), _configuration.TimeToWaitForWorkersToCancel);
if (alCancel.Any(r => r.Running))
{
alCancel.AsParallel().ForAll(w => w.AttemptToTerminate());
}
}
//force kill workers that are still running by aborting the thread, or waiting until work has completed
var alForceTerminate = workers.Where(worker => worker.Running).ToList();
if (alForceTerminate.Count > 0)
{
alForceTerminate.AsParallel().ForAll(w => w.TryForceTerminate());
}
//dispose workers - they are created by a factory, and must be disposed of
foreach (var worker in workers)
{
try
{
worker.Dispose();
}
catch (Exception e)
{
_log.ErrorException("An error has occurred while disposing of a worker", e, null);
}
}
}
/// <inheritdoc />
public void ResumeWorkers()
{
_workerPause.Set();
}