java 监听redis事件

第一步：利用RDM等redis连接工具查看相应事件，然后去网上搜索 一下，会有redis各种事件的说明，选择契合业务的事件；

 

 

 

 第二步：创建监听处理类；

 1 package com.lechuang.auth.advice;
 2 
 3 import com.lechuang.common.core.entity.LeChuangAuthUser;
 4 import com.lechuang.common.core.entity.system.SystemUser;
 5 import com.lechuang.common.core.utils.LeChuangUtil;
 6 import com.lechuang.common.redis.service.RedisDBService;
 7 import com.lechuang.common.redis.service.RedisService;
 8 import lombok.RequiredArgsConstructor;
 9 import lombok.extern.slf4j.Slf4j;
10 import org.springframework.beans.factory.annotation.Autowired;
11 import org.springframework.data.redis.connection.Message;
12 import org.springframework.data.redis.connection.MessageListener;
13 import org.springframework.scheduling.annotation.Async;
14 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
15 import org.springframework.security.core.userdetails.User;
16 import org.springframework.security.oauth2.common.DefaultOAuth2AccessToken;
17 import org.springframework.security.oauth2.provider.OAuth2Authentication;
18 import org.springframework.security.oauth2.provider.token.TokenStore;
19 import org.springframework.stereotype.Service;
20 import org.springframework.util.ObjectUtils;
21 
22 import javax.annotation.Resource;
23 import java.lang.reflect.Field;
24 import java.util.LinkedHashMap;
25 
26 /**
27  * 功能描述：Redis监听
28  * 作者：唐泽齐
29  */
30 @Slf4j
31 @Service
32 @RequiredArgsConstructor
33 public class LiveRedisKeysExpireListener implements MessageListener {
34 
35     @Autowired
36     private RedisDBService redisDBService;
37     @Resource
38     private TokenStore tokenStore;
39 
40     @Override
41     public void onMessage(Message message, byte[] pattern) {
42         Object o = redisDBService.getAndSet(9, "renewUser:" + message.toString(), null);
43         if(!ObjectUtils.isEmpty(o)) {
44             log.info("处理用户缓存信息更新："+message.toString());
45             renewToken(o,message.toString());
46         } else {
47             redisDBService.del(9,"renewUser:" + message.toString());
48         }
49     }
50 
51     @Async
52     void renewToken(Object o,String tokenKey) {
53         try {
54             SystemUser user = (SystemUser) o;
55             OAuth2Authentication authentication = tokenStore.readAuthentication(tokenKey);
56             UsernamePasswordAuthenticationToken token = (UsernamePasswordAuthenticationToken) authentication.getUserAuthentication();
57             LinkedHashMap details = (LinkedHashMap) token.getDetails();
58             LinkedHashMap principal = (LinkedHashMap) details.get("principal");
59 
60             LeChuangAuthUser authUser = (LeChuangAuthUser) token.getPrincipal();
61 
62             //更新username
63             Field username = User.class.getDeclaredField("username");
64             username.setAccessible(true);
65             username.set(authUser,user.getUsername());
66             //更新 avatar
67             authUser.setAvatar(user.getAvatar());
68             //将新凭证 写入 token
69             DefaultOAuth2AccessToken oauthtoken = new DefaultOAuth2AccessToken(tokenKey);
70             oauthtoken.setTokenType("Bearer");
71             tokenStore.storeAccessToken(oauthtoken, authentication);
72             redisDBService.del(9,"renewUser:"+tokenKey);
73         } catch (Exception e) {
74             e.printStackTrace();
75         }
76     }
77 
78 }

第三步：将监听处理类加入项目环境配置中，伴随项目启动；

 1 package com.lechuang.auth.advice;
 2 
 3 import org.springframework.context.annotation.Bean;
 4 import org.springframework.context.annotation.Configuration;
 5 import org.springframework.data.redis.connection.RedisConnectionFactory;
 6 import org.springframework.data.redis.listener.PatternTopic;
 7 import org.springframework.data.redis.listener.RedisMessageListenerContainer;
 8 
 9 import javax.annotation.Resource;
10 
11 /**
12  * 功能描述：Redis监听配置
13  * 作者：唐泽齐
14  */
15 @Configuration
16 public class RedisListenerConfig {
17 
18     @Resource
19     private LiveRedisKeysExpireListener liveRedisKeysExpireListener;
20 
21     @Bean
22     RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory) {
23         RedisMessageListenerContainer container = new RedisMessageListenerContainer();
24         container.setConnectionFactory(connectionFactory);
25         container.addMessageListener(liveRedisKeysExpireListener, new PatternTopic("__keyevent@9__:expire"));
26         return container;
27     }
28 
29 }

 

posted on 2021-11-02 16:08  instr  阅读(2600)  评论(0)  编辑  收藏  举报

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