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SpringConfig文件,配置listenerContainer,redisKeyExpirationListener两个bean
package com.yj.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.listener.KeyExpirationEventMessageListener;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import com.yj.listener.RedisKeyExpirationListener;
@Configuration
@ComponentScan("com.yj")
public class SpringConfig {
@Bean
RedisMessageListenerContainer listenerContainer(RedisConnectionFactory connectionFactory) {
RedisMessageListenerContainer listenerContainer = new RedisMessageListenerContainer();
listenerContainer.setConnectionFactory(connectionFactory);
return listenerContainer;
}
@Bean
KeyExpirationEventMessageListener redisKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
return new RedisKeyExpirationListener(listenerContainer);
}
}
RedisKeyExpirationListener文继承KeyExpirationEventMessageListener,重写onMessage回调方法
package com.yj.listener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.redis.connection.Message;
import org.springframework.data.redis.listener.KeyExpirationEventMessageListener;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
public class RedisKeyExpirationListener extends KeyExpirationEventMessageListener {
private static final Logger logger = LoggerFactory.getLogger(RedisKeyExpirationListener.class);
public RedisKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
super(listenerContainer);
}
@Override
public void onMessage(Message message, byte[] pattern) {
String redisKey = message.toString();
logger.info("即将要失效的Key:" + redisKey);
}
}
我们往redis中插入一条expire为10秒的数据,则当key失效时,会触发监听,打印出
2018-11-09 15:04:08.209 INFO 10360 --- [enerContainer-2] c.y.listener.RedisKeyExpirationListener : 即将要失效的Key:test