internal static Task <object> GetApproachingEndTask(this IVpaid vpaid, CancellationToken cancellationToken) { return(TaskHelpers.FromEvent <object>(eh => vpaid.AdVideoThirdQuartile += eh, eh => vpaid.AdVideoThirdQuartile -= eh, cancellationToken)); }
internal static Task <object> GetStoppedTask(this IVpaid vpaid, CancellationToken cancellationToken) { return(TaskHelpers.FromEvent <object>(eh => vpaid.AdStopped += eh, eh => vpaid.AdStopped -= eh, cancellationToken)); }
internal static Task <Exception> GetErrorTask(this IVpaid vpaid, CancellationToken cancellationToken) { return(TaskHelpers.FromEvent <VpaidMessageEventArgs>(eh => vpaid.AdError += eh, eh => vpaid.AdError -= eh, cancellationToken).ContinueWith(t => new Exception(t.Result.Message), TaskContinuationOptions.OnlyOnRanToCompletion)); }
internal static Task <EventArgs> GetLoadedTask(this IVpaid vpaid, CancellationToken cancellationToken) { return(TaskHelpers.FromEvent(eh => vpaid.AdLoaded += eh, eh => vpaid.AdLoaded -= eh, cancellationToken)); }
/// <summary> /// Note: This method is re-entrant safe but not thread safe. /// </summary> /// <param name="adDocument">The ad document to execute.</param> /// <param name="adSource">The original ad source that the ad document came from.</param> /// <param name="startTimeout">The timeout for the ad</param> /// <param name="cancellationToken">A cancellation token to cancel the ad.</param> /// <param name="progress">Reports progress of the ad.</param> /// <returns>Two tasks that indicate when the ad is finished and another for when the ad is done with its linear portion</returns> PlayAdAsyncResult PlayAdAsync(AdDocumentPayload adDocument, IAdSource adSource, TimeSpan?startTimeout, CancellationToken cancellationToken, IProgress <AdStatus> progress) { // primary task wll hold a task that finishes when the ad document finishes or a non-linear ad starts. var primaryTask = new TaskCompletionSource <object>(); // secondary task will hold a task that finishes when the entire ad document finishes. var secondaryTask = TaskHelpers.Create <Task>(async() => { LoadException loadException = null; // keep around to re-throw in case we can't recover using (var timeoutTokenSource = new CancellationTokenSource()) { if (startTimeout.HasValue) { timeoutTokenSource.CancelAfter(startTimeout.Value); } var timeoutToken = timeoutTokenSource.Token; using (var mainCancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, timeoutToken)) { var mainCancellationToken = mainCancellationTokenSource.Token; // NOTE: mainCancellationToken is reset to just the initial token once we have successfully started an ad. progress.Report(AdStatus.Opening); try { try { bool podPlayed = false; // throw an exception if no ad ever played // a task to hold the currently playing ad Task activeAdTask = null; foreach (var adPod in adDocument.AdPods) { try { bool adPlayed = false; // throw an exception if no ad ever played // model expects ads to be in the correct order. foreach (var defaultAd in adPod.Ads) { try { var adCandidates = new List <Ad>(); adCandidates.Add(defaultAd); adCandidates.AddRange(defaultAd.FallbackAds); foreach (var ad in adCandidates) { try // **** try ad **** { // group the creatives by sequence number. Always put the group without sequence number at the back of the piority list in compliance with VAST spec. foreach (var creativeSet in ad.Creatives.GroupBy(c => c.Sequence).OrderBy(cs => cs.Key.GetValueOrDefault(int.MaxValue)).Select(cs => cs.ToList())) { var newAdUnit = await LoadAdUnitAsync(creativeSet, ad, adSource, mainCancellationToken); // if there is an ad playing, wait for it to finish before proceeding. if (activeAdTask.IsRunning()) { await activeAdTask; mainCancellationToken.ThrowIfCancellationRequested(); // we can safely assume this is not a timeout and only check the token passed as a param } if (!newAdUnit.Player.AdLinear) { // if the next ad is nonlinear, we've successfully finished the primary task. primaryTask.TrySetResult(null); } LoadAdUnit(newAdUnit, creativeSet); adPlayed = true; loadException = null; // if there was a load error, we recovered, reset. progress.Report(AdStatus.Loaded); activeAd = newAdUnit; VpaidController.AddAd(activeAd); try { await StartAdUnitAsync(newAdUnit, ad, mainCancellationToken); // we successfully started an ad, create a new cancellation token that is not linked to timeout mainCancellationToken = cancellationToken; progress.Report(AdStatus.Playing); // returns when task is over or approaching end activeAdTask = await PlayAdUnitAsync(newAdUnit, mainCancellationToken); if (activeAdTask != null) { activeAdTask = activeAdTask.ContinueWith((Task t) => { progress.Report(AdStatus.Complete); activeAd = null; }, TaskScheduler.FromCurrentSynchronizationContext()); } else { progress.Report(AdStatus.Complete); activeAd = null; } } catch { CleanupAd(activeAd); progress.Report(AdStatus.Complete); activeAd = null; throw; } } break; // we successfully played an ad, break out of loop. } // **** end try ad **** catch (LoadException) { if (ad == adCandidates.Last()) { throw; // ignore if it's not the last ad in order to go to next fallback ad } } } } catch (LoadException) { if (defaultAd == adPod.Ads.Last()) { throw; // ignore if it's not the last ad in the pod } } } if (!adPlayed) { throw new LoadException(new Exception("No ads found.")); } podPlayed = true; break; // we should only play one adPod per the VAST spec } catch (LoadException ex) { // keep around to re-throw in case we can't successfully load an ad loadException = ex; // move to the next adpod, ignore for now. We'll log this later if it's relevant } } // always wait for the playing ad to complete before returning if (activeAdTask.IsRunning()) { await activeAdTask; } if (!podPlayed) { VpaidController.TrackErrorUrl(adDocument.Error, Microsoft.Media.Advertising.VpaidController.Error_NoAd); throw new LoadException(new Exception("No ads found.")); } } catch (OperationCanceledException) { if (timeoutToken.IsCancellationRequested) { throw new TimeoutException(); } else { throw; } } catch (Exception ex) { throw new PlayException(ex); } if (loadException != null) { throw loadException; } } catch (Exception ex) { LogError(adSource, ex); primaryTask.TrySetException(ex); throw; } finally { progress.Report(AdStatus.Unloaded); } primaryTask.TrySetResult(null); } } }); return(new PlayAdAsyncResult(primaryTask.Task, secondaryTask)); }