在Clojure中以定期的时间间隔执行代码 [英] Executing code at regularly timed intervals in Clojure

问题描述

在Clojure中，定期执行代码的最佳方法是什么？我目前使用java.util.concurrent.ScheduledExecutorService，但那是Java - 是有一个Clojure方法调度代码以定期间隔运行，延迟后，可以取消？所有Clojure代码示例我看到使用Thread / sleep，这也似乎太Java了。

What's the best way to make code run at regular intervals in Clojure ? I'm currently using java.util.concurrent.ScheduledExecutorService, but that's Java - is there a Clojure way of scheduling code to run at regular intervals, after a delay, cancellably ? All the Clojure code examples I've seen use Thread/sleep, which also seems too Java.

推荐答案

Overtone 的源代码，特别是在特定时间安排活动的代码。

这是一个音乐合成系统，所以你必须希望他们有定时代码的权利!!

It's a music synthesis system so you have to hope they have the timing code right!!

他们有帮助地将时间代码分离成一个单独的项目（ overtone / at-at ），以便您可以轻松地导入它，如果你想要的。这为底层Java库提供了一个很好的Clojure包装器（即 ScheduledThreadPoolExecutor < a>和朋友）。语法如下：

Also they have helpfully separated the timing code out into a separate project (overtone/at-at) so that you can easily import it if you want. This provides a nice Clojure wrapper to the underlying Java libraries (i.e. ScheduledThreadPoolExecutor and friends). The syntax is like this:

;; run some-function every 500ms
(every 500 some-function)

在特定时间的活动：

;; run some-other-function 10 seconds from now
(at (+ 10000 (now)) some-other-function)

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