package com.zeekling.redis;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

/**
 * @author zeekling [lingzhaohui@zeekling.cn]
 * @version 1.0
 * @apiNote redis 连接池
 * @since 2020-06-21
 */
public class RedisPool {

    //Redis服务器IP
    private static final String ADDR = "127.0.0.1";
    //Redis的端口号
    private static final Integer PORT = 6379;
    //访问密码
    private static final String AUTH = null;

    //可用连接实例的最大数目，默认为8；
    //如果赋值为-1，则表示不限制，如果pool已经分配了maxActive个jedis实例，则此时pool的状态为exhausted(耗尽)
    private static final Integer MAX_TOTAL = 1024;
    //控制一个pool最多有多少个状态为idle(空闲)的jedis实例，默认值是8
    private static final Integer MAX_IDLE = 200;
    //等待可用连接的最大时间，单位是毫秒，默认值为-1，表示永不超时。
    //如果超过等待时间，则直接抛出JedisConnectionException
    private static final Integer MAX_WAIT_MILLIS = 10000;
    private static final Integer TIMEOUT = 10000;
    //在borrow(用)一个jedis实例时，是否提前进行validate(验证)操作；
    //如果为true，则得到的jedis实例均是可用的
    private static final Boolean TEST_ON_BORROW = true;
    private  static JedisPool jedisPool = null;

    static {
        JedisPoolConfig config = new JedisPoolConfig();
        config.setMaxTotal(MAX_TOTAL);
        config.setMaxIdle(MAX_IDLE);
        config.setMaxWaitMillis(MAX_WAIT_MILLIS);
        config.setTestOnBorrow(TEST_ON_BORROW);
        jedisPool = new JedisPool(config,ADDR,PORT,TIMEOUT,AUTH);
    }

    /**
     * 获取Jedis实例
     * @return jedis实例
     */
    public synchronized static Jedis getJedis(){
        try {
            if(jedisPool != null){
                return jedisPool.getResource();
            }else{
                return null;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

}