title: Akka Actors: Need an example to understand some basics
body: <p>I'm tinkering with Akka and need some advice how to implement something specific i have in mind. I want to have an actor which i can send a <code>DownloadFile(URI, File)</code> message and downloads it. Since this can be paralleled, I don't want to download file after file but have a limit of concurrent downloads.</p>
  
  <p>Whats the intended way to model something like this with Akka? Other things that come to mind are: What happens if one of the "worker" actor dies for some reason? How to retry the download? Etc. etc.</p>
  
  <p>I know this is a very huge question but i hope someone takes the time to answer it! Thank you!</p>