Spring Data Entity UUID 在 MongoDB 中存储为旧版 UUID

Question

我正在将一些数据转储到我的 MongoDb 中并在途中生成一个 UUID。在集合中，此 UUID 字段存储为 LUUID（旧版 UUID - 类型 3），我不知道如何避免这种情况，因为我希望格式为标准 UUID（类型 4）。

实体：

@Document(collection = "sms")
public class SmsEntity {
    ...
    private UUID ubmMessageSid;  // <- this field gets stored as LUUID
    ...

    public static class Builder {
    ...
        private UUID ubmMessageSid;
    ...

        public Builder ubmMessageSid(UUID ubmMessageSid) {
            this.ubmMessageSid = ubmMessageSid;
            return this;
        }

        public SmsEntity build() {return new SmsEntity(this);}
    }
}

回购协议：

@Repository
public interface SmsRepository extends CrudRepository<SmsEntity, String> {
}

存储该实体的服务：

...
var ubmId = UUID.randomUUID();
var smsEntity = SmsEntity.builder()
    .ubmMessageSid(ubmId)
    ...
    .build();
repository.save(smsEntity);

我需要注释或配置什么才能将 UUID 存储为 Binary/type4？

Answer 1

在 Spring Boot 2 中，对于 Spring MongoDB 3.x，您可以使用自动配置属性进行设置：

# Options: unspecified, standard, c_sharp_legacy, java_legacy, python_legacy
spring.data.mongodb.uuid-representation=standard

Answer 2

您可以在 Mongo 配置中设置 UUID 编解码器。这将使用类型 4 编解码器保留您的 UUID。您需要执行此操作的代码如下：

CodecRegistries.fromRegistries(CodecRegistries.fromCodecs(new UuidCodec(UuidRepresentation.STANDARD)),
                        MongoClient.getDefaultCodecRegistry());
        return new MongoClient(new ServerAddress(address, port), MongoClientOptions.builder().codecRegistry(codecRegistry).build());

这是完整的类，以防万一：

import com.mongodb.MongoClient;
import com.mongodb.MongoClientOptions;
import com.mongodb.ServerAddress;
import org.bson.UuidRepresentation;
import org.bson.codecs.UuidCodec;
import org.bson.codecs.configuration.CodecRegistries;
import org.bson.codecs.configuration.CodecRegistry;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.config.AbstractMongoConfiguration;
import org.springframework.data.mongodb.core.mapping.event.ValidatingMongoEventListener;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;

@Configuration
@EnableAutoConfiguration
@EnableMongoRepositories(basePackages = "com.yourpackage.repositories")
public class MongoConfig extends AbstractMongoConfiguration {
    @Value("${mongo.database}")
    String database;
    @Value("${mongo.address}")
    String address;
    @Value("${mongo.port}")
    Integer port;

    @Override
    protected String getDatabaseName() {
        return database;
    }

    @Override
    public MongoClient mongoClient() {
        CodecRegistry codecRegistry =
                CodecRegistries.fromRegistries(CodecRegistries.fromCodecs(new UuidCodec(UuidRepresentation.STANDARD)),
                        MongoClient.getDefaultCodecRegistry());
        return new MongoClient(new ServerAddress(address, port), MongoClientOptions.builder().codecRegistry(codecRegistry).build());
    }

    @Bean
    public LocalValidatorFactoryBean localValidatorFactoryBean() {
        return new LocalValidatorFactoryBean();
    }

    @Bean
    public ValidatingMongoEventListener validatingMongoEventListener() {
        return new ValidatingMongoEventListener(localValidatorFactoryBean());
    }
}

注意：随着新的 Spring Boot 版本 2.2.0.RELEASEAbstractMongoConfiguration被弃用，它不再起作用了。我为此发表了一篇文章，也许这是一个错误，或者也许有人知道答案：Spring Boot Standard UUID codec not work with AbstractMongoClientConfiguration