Ok, here is some more code:
The line (-> in Player. .play) nil)) in the first function is what I'm
trying to wrap in a future. The first two functions are basically what is
used when trying to play a sound. The other 3 is the "main loop" part of my
program. I don't think anything else is relevant.
(defn play-mp3 [name]
(with-open [in (jio/input-stream (str audiodir name ".mp3"))]
(-> in Player. .play) nil))
(defn play
([words-map] (play words-map "1"))
([words-map n] (let [mp3-n (min (Integer/parseInt n) (:mp3s @last-info))]
(if (and @last-word (pos? mp3-n))
(play-mp3 (str @last-word mp3-n))
{:output "play what?"}))))
(def cmds (let [cmds ["add" "delete" "random" "show" "help" "play"]
cmds (zipmap cmds (map #(ns-resolve 'dictionary.core
(symbol %)) cmds))]
(conj cmds ["key" pron-key] ["lookup" lookup-cmd])))
(defn handle [cmd]
(let [[cmd & args] (str/split cmd #"\s+")
matching (starts-with-in cmd cmds)]
(when (= 1 (count matching))
(let [{:keys [output new-words-map]}
(apply (val (first matching)) @words-atom args)]
(if output (println output))
(if new-words-map (reset! words-atom new-words-map))))
(if (and (or (.startsWith "exit" cmd) (.startsWith "quit" cmd)) (pos?
(count cmd)))
false
true)))
(defn -main [& args]
(def words-atom (atom (load-words)))
(loop []
(print "> ") (flush)
(let [cmd (read-line)]
(println)
(when (handle cmd)
(println)
(store-words @words-atom)
(recur))))
(shutdown-agents))
On Monday, December 31, 2012 12:12:09 AM UTC+1, Moritz Ulrich wrote:
>
> Laziness might be your problem, but that wouldn't explain (println
> "called") working without a deref.
>
> Can you show a bit more code around this call to `future'?
>
> On Sun, Dec 30, 2012 at 8:31 AM, Oskar Kvist
> <[email protected]<javascript:>>
> wrote:
> > Hi!
> >
> > I'm trying to play a sound in my application, using
> > http://www.javazoom.net/javalayer/documents.html that lib. Anyway, I
> tried
> > playing the sound in a future, so the main thread would not block while
> > playing, like so: (future (-> in Player. .play)). But if I don't deref
> the
> > future, the sound does not play. If I do deref it, the sound plays, but
> I
> > have to wait for it, which is what I wanted to avoid. If I do (future
> (do
> > (println "called") (-> in Player. .play))), without a deref, it prints
> > "called" but does still not play the sound. If I do (future (do (-> in
> > Player. .play) (println "called"))), without a deref, it neither prints
> nor
> > plays. What could be wrong?
> >
> > I'm using clojure 1.4.0 and `lein trampoline run -m ns/main` to run my
> > program.
> >
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