You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: temporary_redis.rb
    path of file: ./repos/discourse/lib
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class TemporaryRedis
  REDIS_TEMP_DIR = "/tmp/discourse_temp_redis"
  REDIS_LOG_PATH = "#{REDIS_TEMP_DIR}/redis.log"
  REDIS_PID_PATH = "#{REDIS_TEMP_DIR}/redis.pid"

  attr_reader :instance

  def initialize
    set_redis_server_bin
  end

  def port
    @port ||= find_free_port(11_000..11_900)
  end

  def start
   
    
  def start
    return if @started
    FileUtils.rm_rf(REDIS_TEMP_DIR)
    Dir.mkdir(REDIS_TEMP_DIR)
    FileUtils.touch(REDIS_LOG_PATH)

    puts "Starting redis on port: #{port}"
    @thread =
      Thread.new do
        system(
          @redis_server_bin,
          "--port",
          port.to_s,
          "--pidfile",
          REDIS_PID_PATH,
          "--logfile",
          REDIS_LOG_PATH,
          "--databases",
          "1",
          "--save",
          '""',
          "--appendonly",
          "no",
          "--daemonize",
          "no",
          "--maxclients",
          "100",
          "--dir",
          REDIS_TEMP_DIR,
        )
      end

    puts "Waiting for redis server to start..."
    success = false
    instance = nil
    config = { port: port, host: "127.0.0.1", db: 0 }
    start = Time.now
    while !success
      begin
        instance = DiscourseRedis.new(config, namespace: true)
        success = instance.ping == "PONG"
      rescue Redis::CannotConnectError
      ensure
        if !success && (Time.now - start) >= 5
          STDERR.puts "ERROR: Could not connect to redis in 5 seconds."
          self.remove
          exit(1)
        elsif !success
          sleep 0.1
        end