/// <summary>
/// 异步操作的Subject
/// </summary>
public static void AsyncSubjectConvertTask()
{
//var tcs = new TaskCompletionSource<bool>();
//var task = tcs.Task;
var sbj = new AsyncSubject <string>();
sbj.SubscribeConsole();
var task = PrimeGenerator.GenerateAsync(5);
task.ContinueWith(t =>
{
switch (t.Status)
{
case TaskStatus.RanToCompletion:
sbj.OnNext(string.Join(",", t.Result));
sbj.OnCompleted();
break;
case TaskStatus.Canceled:
sbj.OnError(t.Exception.InnerException);
break;
case TaskStatus.Faulted:
sbj.OnError(new TaskCanceledException(t));
break;
}
}, TaskContinuationOptions.ExecuteSynchronously);
//tcs.SetResult(true);
}
/// <summary>
/// 一个典型的错误使用 Subject 的方式，就是用来合并两个 Observable，合并应该用 Merge
/// 使用 Subject 前先思考一下，有没有重新造轮子了
/// </summary>
public static void ClassicMisuse()
{
var sbj = new Subject <string>();
sbj.SubscribeConsole();
Observable.Timer(TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1)).Select(x => $"IEnumerable {x}").Subscribe(sbj); // 这个 Observable 没有机会完成，因为另一个 Observable 先完成了，所以整个Subject 就完成了
PrimeGenerator.GenerateAsync(5).ToObservable().SelectMany(x => x.Select(y => $"Task {y}")).Subscribe(sbj);
}