naive.rb

def operation(iteration)
  puts "[INFO #{Time.now}] Start operation, iteration #{iteration}. Part " \
    "one: Eg. we might long poll for messages here"

  sleep(5)

  puts "[INFO #{Time.now}] Operation part two. Eg. we might process " \
    "messages here."

  sleep(1)

  puts "[INFO #{Time.now}] Operation part three. Eg. we might acknowledge " \
    "the message as processed here."

  sleep(1)

  puts "[INFO #{Time.now}] Operation, iteration #{iteration}, complete."
end

# Only runs if the file is the entry point for execution,
# but not if loaded as a library
if $0 == __FILE__
  puts "[INFO #{Time.now}] #--- Starting Worker Program ---#"

  iteration = 0

  # Main loop
  while true
    operation(iteration)
    iteration += 1
  end
end