public static void QueueUserWorkItemAndCancelIt()
{
ThreadLogger.Log("main start");
var cts = new CancellationTokenSource();
var token = cts.Token;
System.Threading.ThreadPool.QueueUserWorkItem(x => IntensiveOperationsService.CancellableLoop(token));
Thread.Sleep(3000);
cts.Cancel();
ThreadLogger.Log("main end");
}
public static void CancellationTokenWithCallback()
{
ThreadLogger.Log("main start");
var cts = new CancellationTokenSource();
var token = cts.Token;
token.Register(() => ThreadLogger.Log("token has been cancelled"));
System.Threading.ThreadPool.QueueUserWorkItem(x => IntensiveOperationsService.CancellableLoop(token));
Thread.Sleep(3000);
cts.Cancel();
ThreadLogger.Log("main end");
}
public static void LinkedCancellationTokens()
{
ThreadLogger.Log("main start");
var cts1 = new CancellationTokenSource();
cts1.Token.Register(() => ThreadLogger.Log("cts1 cancelled"));
var cts2 = new CancellationTokenSource();
cts2.Token.Register(() => ThreadLogger.Log("cts2 cancelled"));
var cts = CancellationTokenSource.CreateLinkedTokenSource(cts1.Token, cts2.Token);
cts.Token.Register(() => ThreadLogger.Log("linked cts cancelled"));
System.Threading.ThreadPool.QueueUserWorkItem(x => IntensiveOperationsService.CancellableLoop(cts.Token));
Thread.Sleep(3000);
cts2.Cancel();
ThreadLogger.Log("main end");
}
public static void CancellationTokenCallbackThrowingExceptionsWithAggregation()
{
ThreadLogger.Log("main start");
var cts = new CancellationTokenSource();
var token = cts.Token;
token.Register(() => throw new Exception("foo"));
token.Register(() => throw new Exception("bar"));
System.Threading.ThreadPool.QueueUserWorkItem(x => IntensiveOperationsService.CancellableLoop(token));
Thread.Sleep(3000);
try
{
cts.Cancel(false);
}
catch (AggregateException ex)
{
ThreadLogger.Log($"main exception: {ex.GetType()} - {ex.InnerExceptions.Select(e => e.Message).Aggregate((a, b) => a + ", " + b)}");
}
ThreadLogger.Log("main end");
}