Convert CompletableFuture (Java 8) to Future (Scala)

Question

I want to change the return type of the method below to Future[Unit]

def send(data: Array[Byte]): CompletableFuture[Void] = {   val f:CompletableFuture[Void] = client.send(data)   f } 

I'm using Scala 2.12.1. Is there any convenient way to convert from Java 8 CompletableFuture to Scala's Future?

Answer 1

Yes, it's called scala-java8-compat, and here's the method you're looking for.

Answer 2

Though 2.12 was mentioned by asker (in 2017), now we have 2.13 and the conversion has become easier:

Starting Scala 2.13, the standard library includes scala.jdk.FutureConverters which provides Java to Scala CompletableFuture/Future implicit conversions:

import scala.jdk.FutureConverters._  val scalaFuture = javaFuture.asScala 

Convert a Java Future to a Scala Future