/// <summary> /// Wraps the non-generic <see cref="T:System.Threading.Tasks.Task" /> into a generic <see cref="T:System.Threading.Tasks.Task" />. /// </summary> /// <param name="taskAction">The task to wrap.</param> /// <returns>A <see cref="T:System.Threading.Tasks.Task" /> that wraps the non-generic <see cref="T:System.Threading.Tasks.Task" />.</returns> private static Task <bool> StartAsGenericTask(Func <Task> taskAction) { Task task = taskAction(); if (task == null) { throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, Resources.TaskCannotBeNull, new object[] { "taskAction" }), "taskAction"); } if (task.Status == TaskStatus.RanToCompletion) { return(AsyncExecution.GetCachedTask()); } if (task.Status == TaskStatus.Created) { throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, Resources.TaskMustBeScheduled, new object[] { "taskAction" }), "taskAction"); } TaskCompletionSource <bool> tcs = new TaskCompletionSource <bool>(); task.ContinueWith(delegate(Task t) { if (t.IsFaulted) { tcs.TrySetException(t.Exception.InnerExceptions); return; } if (t.IsCanceled) { tcs.TrySetCanceled(); return; } tcs.TrySetResult(true); }, TaskContinuationOptions.ExecuteSynchronously); return(tcs.Task); }
public AsyncExecution(Func <Task> taskAction, ShouldRetry shouldRetry, Func <Exception, bool> isTransient, Action <int, Exception, TimeSpan> onRetrying, bool fastFirstRetry, CancellationToken cancellationToken) : base(() => AsyncExecution.StartAsGenericTask(taskAction), shouldRetry, isTransient, onRetrying, fastFirstRetry, cancellationToken) { }