记录一些 Redis 缓存及 ObjectMapper 的配置。
Object Mapper
首先提供一个全局的 JsonMapper 作为 jackson 的 ObjectMapper，用于序列化和反序列化。
顺便解决 jsr310 相关的日期序列化问题。
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| import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.json.JsonMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class JacksonConfig {
@Bean
public ObjectMapper jsonMapper() {
return JsonMapper
.builder()
.findAndAddModules()
.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false)
.build();
}
}
|
Redis Cache Manager
RedisCacheManager 配置，使用 jsonMapper 作为序列化器，我们需要设置 DefaultTyping 以支持反序列化。
根据文档，此处我们选择 NON_FINAL_AND_ENUMS，EVERYTHING 已经弃用且不建议使用。
更多信息可以参考：
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| import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.databind.ObjectMapper;
import jakarta.annotation.Resource;
import lombok.RequiredArgsConstructor;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext.SerializationPair;
import org.springframework.data.redis.serializer.RedisSerializer;
@EnableCaching
@Configuration
@RequiredArgsConstructor
public class CacheConfig {
@Resource(name = "jsonMapper")
private final ObjectMapper jsonMapper;
@Bean
public RedisCacheManager cacheManger(RedisConnectionFactory redisConnectionFactory) {
RedisSerializer<Object> serializer = new GenericJackson2JsonRedisSerializer(
jsonMapper
.copy()
.activateDefaultTyping(
jsonMapper.getPolymorphicTypeValidator(),
ObjectMapper.DefaultTyping.NON_FINAL_AND_ENUMS,
JsonTypeInfo.As.PROPERTY
)
);
return RedisCacheManager
.builder(redisConnectionFactory)
.cacheDefaults(
RedisCacheConfiguration
.defaultCacheConfig()
.computePrefixWith(name -> name + ":")
.disableCachingNullValues()
.serializeValuesWith(SerializationPair.fromSerializer(serializer))
)
.build();
}
}
|