如何隔离spring boot app redis和spring boot session全局redis答案

【问题标题】：How to isolate spring boot app redis and spring boot session global redis如何隔离spring boot app redis和spring boot session全局redis
【发布时间】：2018-06-06 12:33:52
【问题描述】：

据我所知，spring boot 和 spring session 为我们提供了一站式的自动配置，但是当我的应用程序使用 session redis 和 app cache redis 时，redis 服务器不一样；怎么配置，非常感谢您的回复！

【问题讨论】：

标签： spring-boot redis spring-session

【解决方案1】：

确实，默认情况下，spring-session 和 spring-cache 实际上都是由 spring-boot 配置的，带有一个名为 connectionFactory 的 RedisConnectionFactory bean。有两种方法可以做到这一点。

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;
    }
}

使spring-cache 使用不同的connectionFactory bean 实例，并让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;
    }
}

【讨论】：

【解决方案2】：

标记默认的 RedisConnectionFactory @Primary

    @Bean
    @Primary
    public RedisConnectionFactory redisConnectionFactory(RedisProperties properties) {
        return redisConnectionFactory(redisProperties);
    }

并标记会话RedisConnectionFactory @SpringSessionRedisConnectionFactory

    @Bean
    @SpringSessionRedisConnectionFactory
    public RedisConnectionFactory springSessionRedisConnectionFactory() {
        return redisConnectionFactory(...);
    }

redisConnectionFactory() 配置 RedisConnectionFactory。例如：

private static RedisConnectionFactory redisConnectionFactory(RedisProperties redisProperties, boolean afterPropertiesSet) {
        RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration();
        redisStandaloneConfiguration.setHostName(redisProperties.getHost());
        redisStandaloneConfiguration.setPassword(RedisPassword.of(redisProperties.getPassword()));
        redisStandaloneConfiguration.setDatabase(redisProperties.getDatabase());
        redisStandaloneConfiguration.setPort(redisProperties.getPort());

        GenericObjectPoolConfig genericObjectPoolConfig = new GenericObjectPoolConfig();
        genericObjectPoolConfig.setMaxIdle(redisProperties.getLettuce().getPool().getMaxIdle());
        genericObjectPoolConfig.setMinIdle(redisProperties.getLettuce().getPool().getMinIdle());
        genericObjectPoolConfig.setMaxTotal(redisProperties.getLettuce().getPool().getMaxActive());
        genericObjectPoolConfig.setMaxWaitMillis(redisProperties.getLettuce().getPool().getMaxWait().toMillis());
        genericObjectPoolConfig.setTestOnBorrow(true);
        genericObjectPoolConfig.setTestOnReturn(true);

        LettuceConnectionFactory lettuceConnectionFactory = new LettuceConnectionFactory(redisStandaloneConfiguration,
                LettucePoolingClientConfiguration.builder().commandTimeout(redisProperties.getTimeout()).poolConfig(genericObjectPoolConfig).build());
        if (afterPropertiesSet) {
            lettuceConnectionFactory.afterPropertiesSet();
        }
        return lettuceConnectionFactory;
    }

【讨论】：