Clojure：当在go块或线程中执行代码时，记录到控制台 [英] Clojure: log to console when code is being executed in a go block or thread

问题描述

有许多go块一次，所有写入控制台，文本可以得到混乱/混合，当它到达控制台。如何避免这种情况，因此，当在go块内发出时，跟踪输出在控制台中正确显示？

With many go blocks going at once, all writing to the console, the text can get jumbled/intermingled when it arrives at the console. How to avoid this, so trace output forms as correctly in the console as intended when it was emitted from within the go block?

推荐答案

这个答案使用 core.async 本身。下面的讲座：

This answer uses core.async itself. The following from a talk:

;;;;; Logging Handler ;;;;;

(def log-chan (chan))

(thread
 (loop []
   (when-let [v (<!! log-chan)]
     (println v)
     (recur)))
 (println "Log Closed"))


(close! log-chan)

(defn log [msg]
  (>!! log-chan msg))

(log "foo")

从这里

Talk是由Timothy Balridge和是这里

Talk was by Timothy Balridge and is here

我有 atom 用于打开和关闭调试。对于显示的消息，使用方式如下：

I have an atom for turning debugging on and off. To be precise about the messages that are displayed the usage is like this:

(u/log @debug (str "Asked " info-ele ", and got back: " some-return))

：

At the other end like this:

(defn log [debug msg] 
  (when debug (>!! log-chan msg)))

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