node-redisでよく使うやつだけ

redis.js

var Redis = require('redis');

function redisConnect() {
  var client = Redis.createClient(),
      redis = {
        end: function() {
          client.end();
          for (let prop in redis) {
            delete redis[prop];
          }
        }
      };
  ['hset', 'hgetall', 'hget', 'hdel'].map(method => {
    redis[method] = () => {
      var args = Array.prototype.slice.call(arguments);
      return new Promise((resolve, reject) => {
        args.push((error, result) => {
          return (!error) ? resolve(result) : reject(error);
        });
        try {
          client[method].apply(client, args);
        } catch(e) {
          reject(e);
        }
      });
    }
  });
  return redis;
}

var redis = redisConnect();
redis.hgetall('hoge').then(result => {
  console.log(result);
  redis.end();
}).catch(error => {
  console.log(error);
  redis.end();
}}