listenablefuture-handler

(defn listenablefuture-handler
  [lf on-success-func on-fail-func]
  (Futures/addCallback
    lf
    (reify FutureCallback
      (onSuccess [_ res]
        (on-success-func res))
      (onFailure [_ e]
        (on-fail-func e))))
  lf)

(listenablefuture-handler (Futures/immediateFuture "666")
            (fn [res] (println "Got results: " res))
            (fn [e] (println "Got error: " e)))

(listenablefuture-handler (Futures/immediateFailedFuture (new java.lang.RuntimeException))
            (fn [res] (println "Got results: " res))
            (fn [e] (println "Got error: " e)))