Method: Deliver::UploadMetadata#retry_if_nil

Defined in:
deliver/lib/deliver/upload_metadata.rb

#retry_if_nil(message) ⇒ Object

Retries a block of code if the return value is nil, with an exponential backoff.



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# File 'deliver/lib/deliver/upload_metadata.rb', line 455

def retry_if_nil(message)
  tries = options[:version_check_wait_retry_limit]
  wait_time = 10
  loop do
    tries -= 1

    value = yield
    return value if value

    # Calculate sleep time to be the lesser of the exponential backoff or 5 minutes.
    # This prevents problems with CI's console output timeouts (of usually 10 minutes), and also
    # speeds up the retry time for the user, as waiting longer than 5 minutes is a too long wait for a retry.
    sleep_time = [wait_time * 2, 5 * 60].min
    UI.message("#{message}... Retrying after #{sleep_time} seconds (remaining: #{tries})")
    Kernel.sleep(sleep_time)

    return nil if tries.zero?

    wait_time *= 2 # Double the wait time for the next iteration
  end
end