spring-boot - 如何隔离spring boot app redis和spring boot session global redis

Question

据我所知，spring boot 和 spring session 为我们提供了一站式自动配置，但是当我的应用程序使用 session redis 和应用程序缓存 redis 时，不是同一个 redis 服务器；怎么设置呢，非常感谢您的回复!

Answer 1

事实上，默认情况下，spring-session 和 spring-cache 实际上都由 spring-boot 配置了一个名为 connectionFactory 的 RedisConnectionFactory bean。有两种方法可以做到这一点。

1. 使 spring-session 使用不同的 connectionFactory bean 实例，并让 spring-cache 使用默认的 connectionFactory。下面是一个示例解决方案:

   @Configuration
   public class RedisHttpSessionConfig {
   
       @Bean
       StringRedisSerializer stringRedisSerializer() {
           return new StringRedisSerializer();
       }
   
       @Bean
       RedisConnectionFactory redisHttpSessionConnectionFactory() {
           RedisConnectionFactory redisHttpSessionConnectionFactory = null;
           // ... add your codes here
           return redisHttpSessionConnectionFactory;
       }
   
       @Bean
       public RedisTemplate<Object, Object> sessionRedisTemplate(
               RedisConnectionFactory redisHttpSessionConnectionFactory) {
           RedisTemplate<Object, Object> template = new RedisTemplate<Object, Object>();
           template.setKeySerializer(new StringRedisSerializer());
           template.setHashKeySerializer(new StringRedisSerializer());
           template.setValueSerializer(new GenericJackson2JsonRedisSerializer());
           template.setDefaultSerializer(GenericJackson2JsonRedisSerializer());
           template.setConnectionFactory(redisHttpSessionConnectionFactory);
           return template;
       }
   }
   

2. 让 spring-cache 使用不同的 connectionFactory bean 实例，让 spring-session 使用默认的 connectionFactory。下面是一个示例解决方案:

   @Configuration
   public class RedisCacheConfig {
   
       @Bean
       StringRedisSerializer stringRedisSerializer() {
           return new StringRedisSerializer();
       }
   
       @Bean
       RedisConnectionFactory redisCacheConnectionFactory() {
            RedisConnectionFactory redisCacheConnectionFactory = null;
            // ... add your codes here
            return redisCacheConnectionFactory;
       }
   
       @Bean
       RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisCacheConnectionFactory) {
           RedisTemplate<Object, Object> redisTemplate = new RedisTemplate();
           redisTemplate.setConnectionFactory(redisCacheConnectionFactory);
           redisTemplate.setKeySerializer(this.stringRedisSerializer());
           redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
           return redisTemplate;
       }
   
       @Bean(name = "stringRedisTemplate")
       public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisCacheConnectionFactory) throws UnknownHostException {
           StringRedisTemplate stringRedisTemplate = new StringRedisTemplate();
           stringRedisTemplate.setConnectionFactory(redisCacheConnectionFactory);
           stringRedisTemplate.setKeySerializer(this.stringRedisSerializer());
           stringRedisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
           return stringRedisTemplate;
       }
   
       @Bean
       CacheManager cacheManager(RedisTemplate redisTemplate) {
           RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
           cacheManager.setDefaultExpiration(600l);
           cacheManager.setUsePrefix(true);
           return cacheManager;
       }
   }