Redis雪崩问题怎么解决-

package com.zhaoyang.controller;

import com.zhaoyang.domain.Person;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.cache.CacheManager;

import org.springframework.cache.annotation.Cacheable;

import org.springframework.data.redis.core.RedisTemplate;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RestController;

//注意：RedisConfig2注销不启动

//使用多级缓存架构，通过增加一层代理层来解决。

@RestController

public class RC3 {

????@Autowired

????private RedisTemplate<String, Object> redisTemplate;

????@Autowired

????private CacheManager ehCacheManager;

????@GetMapping("/person3/{id}")

????@Cacheable(value="userCache", key="#id")

????public Person getUserById(@PathVariable String id){

????????id = "Cache::" + id;

//先从Ehcache缓存中获取

????????Person person = (Person) ehCacheManager.getCache("userCache").get(id);

????????if(person == null){

//再从Redis缓存中获取

????????????person = (Person) redisTemplate.opsForValue().get(id);

????????????if(person != null){

????????????????ehCacheManager.getCache("userCache").put(id, person);

????????????}

????????}

????????return person;

????}

}