require 'request_store'

module Marlowe

  # Marlowe::Formatter is a subclass of +ActiveSupport::Logger::Formatter+
  # that adds a correlation id string to a rails log.
  class Formatter < ActiveSupport::Logger::Formatter

    # Overrides the formatter return to add the correlation id.
    def call(severity, timestamp, progname, msg)
      "[#{RequestStore.store[:correlation_id]}] #{super}"
    end
  end
end