sellinghwa.blogg.se - Openedge download

Private void HandleWebClientDownloadCompleted(object sender, AsyncCompletedEventArgs e) _currentDownloadRequestor.Tell(new DownloadProgressed(_currentUri, e.ProgressPercentage)) Private void HandleWebClientDownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)

We just handle the two callbacks (progress and success).Ī naive approach - that actually works - is the following: private void StartDownload()Ĭlient.DownloadProgressChanged += HandleWebClientDownloadProgressChanged Ĭlient.DownloadFileCompleted += HandleWebClientDownloadCompleted Ĭlient.DownloadFileAsync(_currentUri, _currentTargetPath) Getting progress reporting to work then seemed quite hard. The problem with the PipeTo approach is that our async process gives feedback when it's not done yet too. For an example of using Task inside Actors, check out this example: Akka.NET PipeTo Sample. WebClient.DownloadFileTaskAsync: use the Task Parallell Library.WebClient.DownloadFileAsync: uses callbacks.

There are several ways to make the WebClient do asynchornous downloads: The output of this application should now be: Starting test for Uri ''. TestActor.Tell(new TestActor.StartTest()) Var testActor = system.ActorOf(testProps) Var testProps = Props.Create(() => new TestActor(actor, new Uri(""))) Var props = Props.Create(() => new FileDownloadActor()) Var system = ActorSystem.Create("downloader") We'll define one incoming message RequestDownload and three outgoing messages DownloadStarted, DownloadCompleted and DownloadProgressed: public class FileDownloadActor : ReceiveActor

Report start, end and progress in the form of a Message to the requestorįirst, we create an Actor called FileDownloadActor public class FileDownloadActor : ReceiveActor.

Accept multiple download requests (executed sequentially).

To put it in practice, we'll try to make an Actor that has one simple task: to download something from a URL. Since the only state you change is internal and the code inside a single actor is synchronous, you will be fine. At the same time the code you write in Actors runs sequentially, so you never have to worry about locks of some sort. This allows Akka.NET to run your code in parallell. They have an internal state, but do not share state with other Actors, or anything else. There can be many instances of a certain Actor. Actors communicate by sending and receiving immutable messages. Actor ModelĮach "actor" in the system has a clear responsibility. I'll go through all details but might skim over some of the basics of Akka.NET. It will download files and report its progress to other Actors. In this post, I walk through the creation of a single Actor for Akka.NET.