/usr/share/doc/ruby-redis/examples/pubsub.rb is in ruby-redis 3.2.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | require "redis"
puts <<-EOS
To play with this example use redis-cli from another terminal, like this:
$ redis-cli publish one hello
Finally force the example to exit sending the 'exit' message with:
$ redis-cli publish two exit
EOS
redis = Redis.new
trap(:INT) { puts; exit }
begin
redis.subscribe(:one, :two) do |on|
on.subscribe do |channel, subscriptions|
puts "Subscribed to ##{channel} (#{subscriptions} subscriptions)"
end
on.message do |channel, message|
puts "##{channel}: #{message}"
redis.unsubscribe if message == "exit"
end
on.unsubscribe do |channel, subscriptions|
puts "Unsubscribed from ##{channel} (#{subscriptions} subscriptions)"
end
end
rescue Redis::BaseConnectionError => error
puts "#{error}, retrying in 1s"
sleep 1
retry
end
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