Clojure中的未来承诺挂在我身上 [英] Future promises in Clojure hangs on me

问题描述

当我运行下面的代码它基本上是如何打算，除非它挂在未来完成后。我缺少什么 - 某种关闭代理/线程调用？

When I run the following code it basically works how I intend it to, except that it hangs after the future is finished. What am I missing - some kind of "close agents/threads" call? How should I do this?

(def name-to-greet (promise))

(future
    (println "Hello," @name-to-greet))

(print "What is your name? ")
(flush)
(deliver name-to-greet (read-line))

推荐答案

Futures使用代理线程池，它使用非守护线程，这意味着Clojure不会关闭，直到你调用（shutdown-agents）。 imho，this is bogus（see 我在这里的评论）和我提出的建议，Rich说他会考虑后1.2关于这一点。

Futures use the agent thread pool, which uses non-daemon threads, which means Clojure won't shut down till you call (shutdown-agents). imho, this is bogus (see my comments here) and I've made suggestions that Rich said he would consider post-1.2 around this.

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