worker method that freezes

calculate#calculate!.rb

def calculate!
  self.with_lock do
    Octopus.using(:replica) do
      self.class::CALCULATION_METHODS.each { |method| send(method) }
    end

    self.updated_at = self.calculated_at = Time.now
    self.is_calculated = true
    self.save!(touch: false)
  end

rescue ActiveRecord::StatementInvalid => e
  if e.message.downcase.include?('deadlock')
    raise CalculationDeadLock, e.message
  else
    raise
  end
end