1、修改Redis配置
把 # notify-keyspace-events Ex 前面的注释去掉,然后重启redis
2、pom文件添加
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
3、添加redis监听
package com.example.demo.redis;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.connection.MessageListener;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
@Component
public class RedisMessageListener implements MessageListener {
@Autowired
private RedisTemplate<String, String> redisTemplate;
@Override
//key 过期时调用
public void onMessage(Message message, byte[] pattern) {
System.out.println("onPMessage pattern " + pattern + " " + " " + message);
String channel = new String(message.getChannel());
String str = (String) redisTemplate.getValueSerializer().deserialize(message.getBody());
System.out.println(str);
}
}
4、配置redis监听key过期事件
package com.example.demo.redis;
import com.example.demo.DemoApplication;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.listener.ChannelTopic;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.data.redis.listener.adapter.MessageListenerAdapter;
@Configuration
//value 是启动类
@Import( value = DemoApplication.class )
public class PubsubConfiguration {
@Autowired
private RedisMessageListener redisMessageListener;
@Bean
public ChannelTopic expiredTopic() {
return new ChannelTopic("__keyevent@0__:expired");
}
@Bean
public RedisMessageListenerContainer redisMessageListenerContainer(
@Autowired RedisConnectionFactory redisConnectionFactory) {
RedisMessageListenerContainer redisMessageListenerContainer = new RedisMessageListenerContainer();
redisMessageListenerContainer.setConnectionFactory(redisConnectionFactory);
redisMessageListenerContainer.addMessageListener(redisMessageListener, expiredTopic());
return redisMessageListenerContainer;
}
}
4、经测试添加key=11,当其过期时,打印效果如下
onPMessage pattern [B@20d980fd 11
11