Spring系列之 集成 Redis

一、SpringBoot 集成Redis 做缓存

1.1、 添加依赖

<!-- redis依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
//线程池
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
    <version>2.6.1</version>
</dependency>

1.2、配置文件（哨兵）

spring:
  redis:
    database: 0
    sentinel:
      master: 'mymaster'
      nodes:
        - "redis://127.0.0.1:26383"
        - "redis://127.0.0.1:26382"
        - "redis://127.0.0.1:26381"
#      password
    lettuce:
      pool:
        # 连接池最大连接数 默认8 ，负数表示没有限制
        max-active: 8
        # 连接池最大阻塞等待时间（使用负值表示没有限制） 默认-1
        max-wait: -1
        # 连接池中的最大空闲连接 默认8
        max-idle: 8
        # 连接池中的最小空闲连接 默认0
        min-idle: 0
    redisson: 
      file: classpath:redisson.yml

1.3、 Redis 缓存配置

@Slf4j
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {
     private RedisSerializer serializer(){
        Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        // 将类型序列化到属性json字符串中
//        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);
        objectMapper.activateDefaultTyping(objectMapper.getPolymorphicTypeValidator(), ObjectMapper.DefaultTyping.NON_FINAL);
        // 对于找不到匹配属性的时候忽略报错
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        // 不包含任何属性的bean也不报错
        objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        serializer.setObjectMapper(objectMapper);
        return serializer;
    }
    /**
     * 如使用注解的话需要配置cacheManager
     *
     * @return
     */
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        //覆盖默认的序列化
        RedisSerializer serializer = serializer();
        //默认配置
        RedisCacheConfiguration defaultCacheConfig = RedisCacheConfiguration
                .defaultCacheConfig()
                //设置默认超过期时间是7天
                .entryTtl(Duration.ofDays(7))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(serializer));
        return RedisCacheManager.builder(redisConnectionFactory)
                .cacheDefaults(defaultCacheConfig)
                .build();
    }
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        //覆盖默认的序列化
        RedisSerializer serializer = serializer();
        StringRedisSerializer stringRedisSerializer = StringRedisSerializer.UTF_8;
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        redisTemplate.setKeySerializer(stringRedisSerializer);
        redisTemplate.setHashKeySerializer(stringRedisSerializer);
        redisTemplate.setHashValueSerializer(serializer);
        redisTemplate.setValueSerializer(serializer);
        redisTemplate.setDefaultSerializer(serializer);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
    @Bean
    @Override
    public CacheErrorHandler errorHandler() {
        // 异常处理，当Redis发生异常时，打印日志，但是程序正常走
        log.info("初始化 -> [{}]", "Redis CacheErrorHandler");
        CacheErrorHandler cacheErrorHandler = new CacheErrorHandler() {
            @Override
            public void handleCacheGetError(RuntimeException e, Cache cache, Object key) {
                log.error("Redis occur handleCacheGetError：key -> [{}]", key, e);
            }
            @Override
            public void handleCachePutError(RuntimeException e, Cache cache, Object key, Object value) {
                log.error("Redis occur handleCachePutError：key -> [{}]；value -> [{}]", key, value, e);
            }
            @Override
            public void handleCacheEvictError(RuntimeException e, Cache cache, Object key) {
                log.error("Redis occur handleCacheEvictError：key -> [{}]", key, e);
            }
            @Override
            public void handleCacheClearError(RuntimeException e, Cache cache) {
                log.error("Redis occur handleCacheClearError：", e);
            }
        };
        return cacheErrorHandler;
    }
}

二、Spring 集成 Redisson

2.1、添加依赖

        <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson-spring-boot-starter</artifactId>
            <version>3.16.6</version>
        </dependency>

2.2、redisson 配置

• application.yml ```yaml spring: redis: redisson:

  file: classpath:redisson.yml

- redisson.yml （哨兵模式）
```yaml
sentinelServersConfig:
  #空闲链接超时
  idleConnectionTimeout: 10000
  #连接超时
  connectTimeout: 10000
  # 超时
  timeout: 3000
  # 重试次数
  retryAttempts: 3
  # 重试间隔
  retryInterval: 1500
  # 失败重连间隔
  failedSlaveReconnectionInterval: 3000
  # 失败检查
  failedSlaveCheckInterval: 60000
  # 密码
  password: null
  subscriptionsPerConnection: 5
  clientName: null
  # 负载均衡
  loadBalancer: !<org.redisson.connection.balancer.RoundRobinLoadBalancer> {}
  subscriptionConnectionMinimumIdleSize: 1
  subscriptionConnectionPoolSize: 50
  slaveConnectionMinimumIdleSize: 24
  slaveConnectionPoolSize: 64
  masterConnectionMinimumIdleSize: 24
  masterConnectionPoolSize: 64
  readMode: "SLAVE"
  subscriptionMode: "SLAVE"
  sentinelAddresses:
    - "redis://127.0.0.1:26383"
    - "redis://127.0.0.1:26382"
    - "redis://127.0.0.1:26381"
  masterName: "mymaster"
  database: 0
threads: 16
nettyThreads: 32
codec: !<org.redisson.codec.JsonJacksonCodec> {}
transportMode: "NIO"

三、参考

1. https://docs.spring.io/spring-data/redis/docs/2.2.0.RELEASE/reference/html/#reference
2. https://github.com/h-dj/Spring-Learning.git