Redis拓展 - 实现定时消息通知

1. Redis实现定时消息通知

简单定时任务通知: 利用redis的keyspace notifications(即:键过期后事件通知机制)

• 开启方法
  • 修改server.conf文件，找到notify-keyspace-events , 修改为“Ex”
  • 使用cli命令: redis-cli config set notify-keyspace-events Ex

• redis 配置参考

---

2. 例子

创建springboot项目

1. 修改pom.xml 和 yml

• pom.xml

    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.6.9 
         
    
    cn.lazyfennec
    redisdemo
    0.0.1-SNAPSHOT
    redisdemo
    Demo project for Spring Boot
    
        1.8
    
    
        
            org.springframework.boot
            spring-boot-starter-data-redis
        

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.projectlombok
            lombok
            true
        

        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
                
                    
                        
                            org.projectlombok
                            lombok
                        
                    
                
            
        
    

• application.yml

spring:
  redis:
    database: 0
    host: 192.168.1.7
    port: 6379
    jedis:
      pool:
        max-active: 8
        max-idle: 8
        min-idle: 0
        max-wait: 1

2. 创建RedisConfig

package cn.lazyfennec.redisdemo.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

/**
 * @Author: Neco
 * @Description:
 * @Date: create in 2022/9/20 23:19
 */
@Configuration
@EnableCaching
public class RedisConfig {

    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        // 设置序列化
        Jackson2JsonRedisSerializer