public void Cancel(ICanExecute jobToCancel)
{
var watch = System.Diagnostics.Stopwatch.StartNew();
var waitTasks = new List<Task>();
lock (executingTasks)
{
foreach (var execInstance in this.executingTasks)
{
if (execInstance.Instance == jobToCancel)
{
waitTasks.Add(execInstance.Task);
execInstance.CancelSource.Cancel();
}
}
}
try
{
Task.WaitAll(waitTasks.ToArray());
}
catch
{
}
watch.Stop();
Console.WriteLine("Waited {1:N1}ms for job {0} to stop from cancel", jobToCancel.Name, watch.Elapsed.TotalMilliseconds);
}
public CancellationTokenSource Execute(ICanExecute value)
{
CleanupCompletedTasks();
CancellationTokenSource cancelSource;
Task task;
if (!value.IsMultiInstance)
{
lock (singleInstanceTasks)
{
if (singleInstanceTasks.ContainsKey(value))
{
// Already running
Console.WriteLine("Single instance already running, skipping");
return null;
}
cancelSource = Execute(cancelToken =>
{
value.Execute(cancelToken);
RemoveExecutingTask(value);
}, value.Name, out task);
singleInstanceTasks.Add(value, task);
}
}
else
{
cancelSource = Execute(cancelToken =>
{
value.Execute(cancelToken);
RemoveExecutingTask(value);
}, value.Name, out task);
}
lock (executingTasks)
{
executingTasks.Add(new ExecuteInstance
{
CancelSource = cancelSource,
Instance = value,
Task = task
});
}
return cancelSource;
}
private void RemoveExecutingTask(ICanExecute value)
{
lock (executingTasks)
{
foreach (var execInstance in this.executingTasks.ToList())
{
if (execInstance.Instance == value)
{
this.executingTasks.Remove(execInstance);
}
}
}
}