package com.trq.springbootjedis.Service.Impl;

import com.trq.springbootjedis.Service.UserService;
import com.trq.springbootjedis.Util.JedisUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import redis.clients.jedis.Jedis;

@Service
public class UserServiceImpl implements UserService {
    private Logger logger = LoggerFactory.getLogger(UserServiceImpl.class);

    @Autowired
    private JedisUtil jedisUtil;

    @Override
    public String getString(String key) {
        // 获取Jedis对象
        Jedis jedis = jedisUtil.getJedis();

        String val = null;

        // 判断key是否存在于Redis
        if(jedis.exists(key)) {

            val = jedis.get(key);
           logger.info(key + "是在Redis中查询到的，值为" + val);
        } else {

            val = "test";   // 模拟从MySQL中查询到的数据
            logger.info(key + "是在MySQL中查询到的，值为" + val);
            jedis.set(key, val);
            logger.info(key + "存入Redis中，值为" + val);
        }

        // 关闭jedis
        jedisUtil.close(jedis);

        return val;
    }
}