Sneakers gem handler error and timeout pseudo code

gistfile1.rb

# if message doesn't contain max retry info then
#   publish to delay (dead-letter) queue with first step
# elsif message contains retry info that's not max then
#   update retry step and publish to delay dead-letter queue
# else
#   send to error (dead-letter) queue

gistfile2.rb

# ripped off code from https://github.com/ooyala/retries/blob/master/lib/retries.rb
# at this point, I don't think this will work with dead-letter queues because you can't change the TTL on-the-fly (it's
# a per queue setting)
def get_delay_seconds()
  if @sleep_enabled
    # The sleep time is an exponentially-increasing function of base_delay_seconds. But, it never exceeds
    # max_delay_seconds.
    delay_seconds = [@base_delay_seconds * (2 ** (attempts - 1)), @max_delay_seconds].min
    # Randomize to a random value in the range delay_seconds/2 .. delay_seconds
    delay_seconds = delay_seconds * (0.5 * (1 + rand()))
    # But never sleep less than base_delay_seconds
    delay_seconds = [@base_delay_seconds, delay_seconds].max
    # convert to milliseconds
    delay_seconds * 1000
  end
  0.0
end