public static async Task <VideoFileInfo> TranscodeVideo(
[ActivityTrigger] VideoFileInfo inputVideo,
//[HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
ILogger log)
{
log.LogInformation($"Transcoding {inputVideo.Location} to {inputVideo.BitRate}");
await Task.Delay(5000);
var transCodedLocation = $"{Path.GetFileNameWithoutExtension(inputVideo.Location)} -" +
$"{inputVideo.BitRate}kbps.mp4";
return(new VideoFileInfo
{
Location = transCodedLocation,
BitRate = inputVideo.BitRate
});
}
public static async Task <object> RunOrchestrator(
[OrchestrationTrigger] IDurableOrchestrationContext ctx,
ILogger log)
{
var videoLocation = ctx.GetInput <string>();
if (!ctx.IsReplaying)
{
log.LogInformation("About to call transcode video activity");
}
var bitRates = new[] { 100, 2000, 3000, 4000 };
var transCodeTasks = new List <Task <VideoFileInfo> > ();
foreach (var bitRate in bitRates)
{
var info = new VideoFileInfo()
{
BitRate = bitRate, Location = videoLocation
};
var task = ctx.CallActivityAsync <VideoFileInfo>("A_TranscodeVideo", info);
transCodeTasks.Add(task);
}
var transcodeResults = await Task.WhenAll(transCodeTasks);
var transcodedLocation = transcodeResults.FirstOrDefault().Location;
//var retriedLocation = await ctx.CallActivityWithRetryAsync<string>("Jake",
// new RetryOptions(TimeSpan.FromSeconds(4), 3),
// videoLocation);
if (!ctx.IsReplaying)
{
log.LogInformation("About to call extract thumbnail");
}
var thumbnailLocation = await
ctx.CallActivityAsync <string>("A_ExtractThumbnail", transcodedLocation);
if (!ctx.IsReplaying)
{
log.LogInformation("About to call prepend intro");
}
var withIntroLocation = await
ctx.CallActivityAsync <string>("A_PrependIntro", transcodedLocation);
// Timing Out waiting for an even
using (var cts = new CancellationTokenSource())
{
var timeout = ctx.CurrentUtcDateTime.AddDays(1);
var timeoutTask = ctx.CreateTimer(timeout, cts.Token);
var approvalTask = ctx.WaitForExternalEvent <string>("EventName");
var theWinner = await Task.WhenAny(timeoutTask, approvalTask);
if (theWinner == approvalTask)
{
var approved = approvalTask.Result;
cts.Cancel();
}
else
{
var approved = "Timed Out";
}
}
return(new
{
Transcoded = transcodedLocation,
Thumbnail = thumbnailLocation,
WithIntro = withIntroLocation
});
}