Redis过期回调

       没学过redis,被要求做一个文件上传10秒超时的需求，一开始以为难的很，当了解了redis的回调机制，真的很简单！！！！

package cn.cge.main.config;

import cn.cge.track.entity.TrackProcessEnum;
import cn.cge.track.service.TrackService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.listener.KeyExpirationEventMessageListener;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;

@Component
public class RedisKeyExpirationListener extends KeyExpirationEventMessageListener {
    private final static Logger logger = LoggerFactory.getLogger(RedisKeyExpirationListener.class);

    public RedisKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
        super(listenerContainer);
    }

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private TrackService trackService;

    @Override
    public void onMessage(Message message, byte[] pattern) {
        try {
            String expiredKey = message.toString();//获取所有key
            //以下是你想执行的代码逻辑
            if(expiredKey.endsWith("_upload！！！")){
                System.out.print("我想输出这句话")
            }
        }catch (Exception e){
            e.printStackTrace();
        }

    }
}

package cn.cge.main.config;

/**
* 这一段直接复制，写死的
**/
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;

@Configuration
public class RedisListenerConfig {
    @Bean
    RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory) {
 
        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        return container;
    }
}

下面是自己写的代码：

String uploadKey = "这是自定义的key_upload!!!";
//插入缓存
redisTemplate.opsForValue().set(uploadKey,"这是值！")；
//设置缓存过期时间为10秒
redisTemplate。expire(uploadkey,10,TimeUnit.SECOUNDS);

//当缓存过期，就会自动执行第一段代码块中的逻辑代码，因为key结尾是_upload!!!,其他的不影响！