What is non blocking and blocking future in Scala?

Question

I am using play framework , i read that Play handles every request in non blocking way. So what is the difference between Blocking & Non Blocking Future in Scala?

Also please provide information about Future & Await.Result() method Thanks !!!

Answer 1

If Await.Result() is called at any point before the Future has completed, the Future becomes blocking. If you instead use onComplete, onSuccess, onFailure, map, or flatMap (and some other methods), you are registering a callback function that will occur when the Future returns. Thus, the Future is non-blocking. Use non-blocking Futures with callbacks whenever possible.