Resque\Redis::instance PHP Method

    public static function instance()
    {
        if (!static::$instance) {
            static::$instance = new static(static::$config);
        }
        return static::$instance;
    }

 protected function execute(InputInterface $input, OutputInterface $output)
 {
     $dialog = $this->getHelperSet()->get('dialog');
     if ($input->getOption('force') || $dialog->askConfirmation($output, 'Continuing will clear all php-resque data from Redis. Are you sure? ', false)) {
         $output->write('Clearing Redis php-resque data... ');
         $redis = Resque\Redis::instance();
         $keys = $redis->keys('*');
         foreach ($keys as $key) {
             $redis->del($key);
         }
         $output->writeln('<pop>Done.</pop>');
     }
 }