redis pub sub test

sub.rb

require "rubygems"
require "redis"

puts <<-EOS
To play with this example use redis-cli from another terminal, like this:
  $ redis-cli publish test msg
EOS

redis = Redis.connect

trap(:INT) { puts; exit }

redis.subscribe(:test) do |on|
  on.message do |channel, message|
    puts "##{channel}: #{message}" 
    #必须建立一个新连接，否则必报错。
    #lib/redis/connection.rb:86:in `format_error_reply': -
    #ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context (RuntimeError)
    redis2 = Redis.connect 
    puts redis2.get 'dyw'
  end
end