clojure.core/future-done?

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Type: function Added: Clojure 1.1 Examples: 3 Runnable: 1

([f])

Returns true if future f is done

Examples

by BertrandDechoux on 2012-06-09 . May have evaluation errors. ▶

(def f (future (Thread/sleep 5000) (inc 0))) (future-done? f) false (Thread/sleep 5000) nil (future-done? f) true

by BertrandDechoux on 2012-06-09 . May have evaluation errors. ▶

;; beware of cancellation !!! (def f (future (Thread/sleep 5000) (inc 0))) #'user/f (future-cancel f) true (future-cancelled? f) true (future-done? f) true @f java.util.concurrent.CancellationException (NO_SOURCE_FILE:0)

by sundaramss on 2022-11-18 ▶

;; removed unhelpful example

Note by pauldoo

Future "done" returns true even for abnormal termination like being cancelled or throwing an exception.

http://download.oracle.com/javase/6/docs/api/java/util/concurrent/Future.html#isDone()

See also

• clojure.core/future (1)
• clojure.core/future-cancel (0)
• clojure.core/future?
• clojure.core/future-cancelled? (0)

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