public void TestExceptions3()
{
TaskExceptionHandler.SetExceptionHandler(task => Console.WriteLine($"[UnhandledException] {task.Exception?.GetBaseException().Message}"));
for (var i = 0; i < 5; i++)
{
Exceptions(i);
}
void Exceptions(int idx)
{
switch (idx)
{
case 0:
AsTask.ToMainContext(() => throw new ApplicationException("ToMainContext"));
break;
case 1:
AsTask.ToBackgroundContext(() => throw new ApplicationException("ToBackgroundContext"));
break;
case 2:
AsTask.ToContext(_contextTests2Id, () => throw new ApplicationException("ToContext"));
break;
case 3:
AsTask.ToStaticThreadPool(() => throw new ApplicationException("ToStaticThreadPool"));
break;
case 4:
AsTask.ToDynamicThreadPool(() => throw new ApplicationException("ToDynamicThreadPool"));
break;
}
}
}
private static async Task Main()
{
WriteLine("Assign an exception handler.");
TaskExceptionHandler.SetExceptionHandler(task =>
{
Error.WriteLine(task.Exception != null
? $"[ExceptionHandler] {task.Exception.GetBaseException().Message}"
: $"[ExceptionHandler] Unhandled exception in task {task}");
});
WriteLine("We get or create a synchronization context and switch to it.");
await AsTask.Initialize();
WriteLine($"Print to the console information about the current context: {AsTask.WhereAmI()}");
WriteLine("Switch to the background context.");
await AsTask.ToBackgroundContext();
WriteLine($"Now we get information about the context of the background context: {AsTask.WhereAmI()}");
WriteLine("Back switch to the main context.");
await AsTask.ToMainContext();
WriteLine("We call the asynchronous methods, which performs the heavy work...");
var tasks = new List <Task <long> >();
for (var i = 1; i <= 10; i++)
{
tasks.Add(FindPrimeNumberAsync(20000 * i));
}
WriteLine("Asynchronously waiting for the execution of tasks.");
_ = Task.WhenAll(tasks).ContinueWith(async task =>
{
await AsTask.ToMainContext();
WriteLine("This is the result of our calculations:");
foreach (var val in task.Result)
{
WriteLine(val);
}
Shutdown();
}).ExceptionHandler();
if (AsTask.IsMainContext())
{
WriteLine("hmm, we're still in the main context!:)");
}
WriteLine("The life cycle of a console application runs on the main context.");
var scheduler = AsTask.GetStaticTaskScheduler();
while (!_isShutdown)
{
WriteLine($"Count running tasks: {scheduler.CountExecutableTasks}; Count tasks in queue: {scheduler.CountTasksInQueue}");
await Task.Delay(1000); // Each iteration waits asynchronously for 1000 ms
}
WriteLine("Shutdown...");
for (var i = 5; i > 0; i--)
{
WriteLine($"Shutdown through {i}s");
await Task.Delay(1000);
}
}
