Task <T> Execute(Task <T> task, Func <T, Task <T> > continuationTask, ExecuteOptions options)
{
if (task.IsCompleted && options.HasFlag(ExecuteOptions.RunSynchronously))
{
if (task.IsFaulted)
{
return(TaskUtil.Faulted <T>(task.Exception.InnerExceptions));
}
if (task.IsCanceled || _cancellationToken.IsCancellationRequested)
{
return(TaskUtil.Canceled <T>());
}
if (task.Status == TaskStatus.RanToCompletion)
{
try
{
return(continuationTask(task.Result));
}
catch (Exception ex)
{
return(TaskUtil.Faulted <T>(ex));
}
}
}
return(ExecuteAsync(task, continuationTask, options));
}
public TaskComposer(T payload, CancellationToken cancellationToken = default(CancellationToken))
{
_payload = payload;
_cancellationToken = cancellationToken;
_task = cancellationToken.IsCancellationRequested
? TaskUtil.Canceled <T>()
: TaskUtil.Completed(payload);
}