In the previous chapter, we looked at all sorts of ways to make and send notifications. It’s an invaluable tool for large applications and more so for applications that need to perform tasks in the background.
Think of the web sites you use regularly, sites like YouTube, Facebook, Twitter, and Google. You know what they have in common (apart from a lot of money)? They all need to do boring work outside of the request/response cycle.
YouTube transforms videos from one format to many different formats. ...
