Class: RateThrottleClient::ExponentialBackoff

Inherits:
Base
  • Object
show all
Defined in:
lib/rate_throttle_client/clients/exponential_backoff.rb

Overview

Actual exponential backoff class with some extra jazz so it reports when sleep goes back to zero

Essentially it doesn’t throttle at all until it hits a 429 then it exponentially throttles every repeatedly limited request. When it hits a successful request it stops rate throttling again.

Instance Attribute Summary

Attributes inherited from Base

#log, #min_sleep, #multiplier, #sleep_for

Instance Method Summary collapse

Methods inherited from Base

#initialize, #jitter

Constructor Details

This class inherits a constructor from RateThrottleClient::Base

Instance Method Details

#call(&block) ⇒ Object 



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# File 'lib/rate_throttle_client/clients/exponential_backoff.rb', line 9

def call(&block)
  sleep_for = @min_sleep

  while (req = yield) && req.status == 429
    @log.call(Info.new(sleep_for: sleep_for, request: req))
    sleep(sleep_for + jitter(sleep_for))

    sleep_for *= @multiplier
  end

  # This no-op is needed to record that we've come out of a
  # retry state for the Demo class.
  sleep(0)

  req
end