public void RunTask()
{
Console.WriteLine();
Console.WriteLine("Output RunTask");
Task <Int32[]> parent = new Task <Int32[]>(() =>
{
var cts = new CancellationTokenSource();
var results = new Int32[3];
new Task(() => results[0] = ThreadTest.Sum(cts.Token, 10000), TaskCreationOptions.AttachedToParent).Start();
new Task(() => results[1] = ThreadTest.Sum(cts.Token, 20000), TaskCreationOptions.AttachedToParent).Start();
new Task(() => results[2] = ThreadTest.Sum(cts.Token, 30000), TaskCreationOptions.AttachedToParent).Start();
return(results);
});
var cwt = parent.ContinueWith(parentTast => Array.ForEach(parentTast.Result, Console.WriteLine));
parent.Start();
}
public void TestFactory()
{
Task parent = new Task(() =>
{
var cts = new CancellationTokenSource();
var taskFactory = new TaskFactory <Int32>(cts.Token, TaskCreationOptions.AttachedToParent,
TaskContinuationOptions.ExecuteSynchronously, TaskScheduler.Default);
var childTasks = new[]
{
taskFactory.StartNew(() => ThreadTest.Sum(cts.Token, 1150)),
taskFactory.StartNew(() => ThreadTest.Sum(cts.Token, 3000)),
taskFactory.StartNew(() => ThreadTest.Sum(cts.Token, 5000))
};
for (int task = 0; task < childTasks.Length; task++)
{
childTasks[task].ContinueWith(t => cts.Cancel(), TaskContinuationOptions.OnlyOnFaulted);
}
taskFactory.ContinueWhenAll(childTasks,
completedTasks => completedTasks.Where(t =>
!t.IsFaulted && !t.IsCanceled).Max(t => t.Result), CancellationToken.None)
.ContinueWith(t => Console.WriteLine("The maximum is : {0} -", t.Result),
TaskContinuationOptions.ExecuteSynchronously);
});
parent.ContinueWith(p =>
{
StringBuilder sb = new StringBuilder();
sb.Append("The following exception occurred:" + Environment.NewLine);
foreach (var e in p.Exception.Flatten().InnerExceptions)
{
sb.AppendLine(" " + e.GetType().ToString());
}
Console.WriteLine(sb.ToString());
}, TaskContinuationOptions.OnlyOnFaulted);
parent.Start();
}