class Redis::Client

def call_pipeline(pipeline)
  commands = pipeline.commands
  return [] if commands.empty?
  with_reconnect pipeline.with_reconnect? do
    begin
      pipeline.finish(call_pipelined(commands)).tap do
        self.db = pipeline.db if pipeline.db
      end
    rescue ConnectionError => e
      return nil if pipeline.shutdown?
      # Assume the pipeline was sent in one piece, but execution of
      # SHUTDOWN caused none of the replies for commands that were executed
      # prior to it from coming back around.
      raise e
    end
  end
end