redis实现定时任务 | 掘金

1、redis 开启key过期通知

修改redis server 配置文件，开启keyt过期听通知配置

notify-keyspace-events Ex

2、 key过期Listener

/** * 监听所有db的过期事件__keyevent@*__:expired" */@Component
public class RedisKeyExpirationListener extends KeyExpirationEventMessageListener {@Autowiredprivate IUserInfoService userInfoService;public RedisKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {       super(listenerContainer);}

/** * 针对redis数据失效事件，进行数据处理 */ @Override public void onMessage(Message message, byte[] pattern) {     //用户做自己的业务处理即可,注意message.toString()可以获取失效的key     String expiredKey = message.toString();     if (expiredKey.startsWith(Constants.USER_LEVEL)) {         //如果是user_level开头的key，进行处理         //将用户等级更新为原有等级         String[] keyParms = expiredKey.split("_");         try {                userInfoService.updateUserInfoData(Integer.parseInt(keyParms[2]));         } catch (Exception e) {                e.printStackTrace();         }    }}

3.监听配置类

/** * redis监听配置类 */@Configurationpublic class RedisListenerConfig {     @Bean     RedisMessageListenerContainer container(RedisConnectionFactory redisConnectionFactory) {        RedisMessageListenerContainer container = new RedisMessageListenerContainer();        container.setConnectionFactory(redisConnectionFactory);        //container.addMessageListener(new RedisExpiredListener(), new PatternTopic("__keyevent@0__:expired"));       return container;     }}