Setting $stdout per-thread

Setting $stdout per-thread via @zite

drbrain | Wed, 16 Aug 2006 18:58:00 GMT Posted in Hacking , Ruby cdfh on #ruby-lang asked how to redirect $stdout per-thread and I came up with this solution, redirect via a thread-local variable: ## # Allows $stdout to be set via Thread.current[:stdout] per thread. module ThreadOut ## # Writes to Thread.current[:stdout] instead of STDOUT if the thread local is # set. def self.write(stuff) if Thread.current[:stdout] then Thread.current[:stdout].write stuff else STDOUT.write stuff end end end $stdout = ThreadOut Simple test: require 'stringio' require 'threadout' s = StringIO.new Thread.start do Thread.current[:stdout] = s puts 'redirected to StringIO' end.join Thread.start do puts 'no redirection' end.join puts s.string Output: no redirection redirected to StringIO

Full article: http://blog.segment7.net/2006/08/16/setting-stdout-per-th...