strawman.rb

class Foo
  
  def logger
    if Application.production?
      $logfile
    elsif Application.development?
      $stdout
    end
  end

  def important_activity
    do_important_thing or logger.puts('Warning: important thing was unsuccessful.')
  rescue StandardError => e
    logger.puts("Exception: important thing raised an exception. Error: #{e.message}")
    raise if $reraise_exceptions
  end
end