Comment by LeanderK

does anybody know some http client libraries that have scalable, performant asynchronous support (including transparent handling of various issues, like too many requests pending etc.). A big plus would be if it would implement the CompletableFuture-interface (idk what it was called). Ideally with an easy, fluent api. I started with using unirest (http://unirest.io/java.html), but it behaved poorly under load (also no CompletableFuture-interface implementation).