Ruby IO Writing & Slurping

hello.md

Writing a file using IO

producer will write a single line of string to file every 1s

require 'securerandom'

fd = IO.sysopen("/tmp/lala.log", "w+")
writer = IO.new(fd)
writer.sync = true
i = 1
while true do
  writer.puts "#{i} - #{SecureRandom.uuid}"
  sleep 1
  i += 1
end
writer.close

Slurping a file using IO

subscriber will read a file every 3s

fd = IO.sysopen("/tmp/lala.log")
reader = IO.new(fd)
while (row = reader.gets) != nil do
  data = row.chomp
  puts ">>> #{data}"
  if reader.eof?
    puts "--------"
    sleep 3
  end
end
reader.close