再送する時などに使用する Exponential Backoff の Ruby 実装です

exponential_backoff_with_full_jitter.rb

# gem install retryable

require 'retryable'

# see: https://aws.typepad.com/sajp/2015/03/backoff.html
#   ↑の full jitter back-off algorithm です
def with_retry
  base = 1.0
  cap = 12.0
  Retryable.retryable(tries: 5, sleep: ->(n) { rand(base..([cap, base * (2 ** n)].min)) }) { yield }
end

# response = with_retry { @api.post_xxx }
# puts response.body
# => { result: true }