spring-boot-2 redis-cache序列化配置注意点
spring-boot-2 redis-cache序列化配置注意点
spring-boot中@CacheXXX系列注解的使得缓存应用十分便利，但是其默认序列化格式为二进制，在配合redis使用时不能直观的观察缓存的数据，所以通常会手动将序列化方式改为json。
这样的序列化配置在网上很多，无非就是CachaManager的配置。
如：
@Bean
public RedisCacheManager cacheManager(RedisConnectionFactory connectionFactory) {
RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(connectionFactory);
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
RedisSerializationContext.SerializationPair然后神奇的配置出现了：
RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
redisCacheConfiguration .entryTtl(Duration.ofSeconds(300))
.serializeValuesWith(pair);这样先获取redisCacheConfiguration在设置，就会发现redis中的类型为二进制，ttl也没有生效：
然而只需要将配置的方式改为链式配置：
RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofSeconds(300))
.serializeValuesWith(pair);于是：
分析原因
实际上是犯了经验主义的错误，习惯性的设置（配置）属性，而RedisCacheConfiguration的配置并不是在源对象上作设置的， 看源码：
public RedisCacheConfiguration serializeValuesWith(SerializationPair valueSerializationPair) {
Assert.notNull(valueSerializationPair, "ValueSerializationPair must not be null!");
return new RedisCacheConfiguration(ttl, cacheNullValues, usePrefix, keyPrefix, keySerializationPair,
valueSerializationPair, conversionService);
}没错，设置序列化后返回的是新的RedisCacheConfiguration。
所以……
知道原因后就没有什么好说的了，在此也只是记录，望自己以后引以为戒。
以下列出demo源码：
pom
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-data-redisartifactId>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>RELEASEversion>
<scope>compilescope>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>config
@EnableCaching
@Configuration
public class RedisCacheConfig extends CachingConfigurerSupport {
@Bean
public RedisCacheConfiguration redisCacheConfiguration() {
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
RedisSerializationContext.SerializationPairservice
@Service
public class RedisAnnotationCacheService {
@CachePut(value = "CacheModel", key = "#version + '-' + #key + '-' + #value")
public CacheModel save(String version, String key, String value) {
return new CacheModel(version, key, value);
}
}test
public class RedisAnnotationCacheServiceTest extends RedisDemoApplicationTests {
@Autowired
RedisAnnotationCacheService service;
@Test
public void save() {
service.save("v1.1.1", "AndroidInfo", "百度app");
}
}