Redis - CrudRepository 保存中的关键 HASH 和 SET 和 ZSET 是如何相关的？

Question

我是 Redis 新手，使用 Spring Boot + Spring Data Redis 示例开发代码。当我保存记录时，我看到 KEYS 被创建并从这些键中使用 4 are HASH、1 ZSET 和 all others are SET。

我没有在 Spring 文档中看到，每个 KEY 的含义都被保存了。 .

127.0.0.1:6379> KEYS *
 1) "persons:c5cfd49d-6688-4b83-a9b7-be55dd1c36ad"
 2) "persons:firstname:bran"
 3) "persons:39e14dae-fa23-4935-948f-1922d668d1c2"
 4) "persons:f0b6dd26-8922-4a36-bd2a-792a17dddff7"
 5) "persons:address.city:Achalpur"
 6) "persons:e493385a-64ae-42be-8398-51757153d273:idx"
 7) "persons:053cdfea-e430-4e1c-acbd-ac40050b10cd:idx"
 8) "persons:firstname:rickon"
 9) "persons:e493385a-64ae-42be-8398-51757153d273"
10) "persons:address.country:India"
11) "persons:e7fc3ebe-9b48-48a8-a5f4-33a0e21f782f:idx"
12) "persons:firstname:sansa"
13) "persons:address:location"
14) "persons:firstname:robb"
15) "persons:firstname:jon"
16) "persons:lastname:snow"
17) "persons:e7fc3ebe-9b48-48a8-a5f4-33a0e21f782f"
18) "persons:c5cfd49d-6688-4b83-a9b7-be55dd1c36ad:idx"
19) "persons:lastname:stark"
20) "persons:f0b6dd26-8922-4a36-bd2a-792a17dddff7:idx"
21) "persons:053cdfea-e430-4e1c-acbd-ac40050b10cd"
22) "persons:39e14dae-fa23-4935-948f-1922d668d1c2:idx"
23) "persons:firstname:arya"
24) "persons:83cd4f58-c272-4d81-9023-8c66c8ac34b0:idx"
25) "persons:83cd4f58-c272-4d81-9023-8c66c8ac34b0"
26) "persons:address.city:Nagpur"
27) "persons:firstname:eddard"
28) "persons"

Person.java

@Data
@EqualsAndHashCode(exclude = { "children" })
@NoArgsConstructor
@AllArgsConstructor
@Builder
@RedisHash("persons")
public class Person {

    private @Id String id;
    private @Indexed String firstname;
    private @Indexed String lastname;

    private Gender gender;
    private Address address;

    private @Reference List<Person> children;
}

地址.java

@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
@EqualsAndHashCode
public class Address {

    private @Indexed String city;
    private @Indexed String country;
    private @GeoIndexed Point location;
}

性别.java

public enum Gender {
    FEMALE, MALE
}

RedisExampleBootApplication.java

@SpringBootApplication
public class RedisExampleBootApplication implements CommandLineRunner{

    @Autowired PersonRepository repository;

    public static void main(String[] args) {
        SpringApplication.run(RedisExampleBootApplication.class, args);
    }

    @Override
    public void run(String... args) throws Exception {  
        Address address1 = Address.builder().city("the north").country("winterfell").location(new Point(52.9541053, -1.2401016)).build();
        Address address2 = Address.builder().city("Casterlystein").country("Westerland").location(new Point(51.5287352, -0.3817819)).build();

        Person eddard = Person.builder().firstname("eddard").lastname("stark").gender(Gender.MALE).address(address1).build();
        Person robb = Person.builder().firstname("robb").lastname("stark").gender(Gender.MALE).address(address2).build();
        Person sansa = Person.builder().firstname("sansa").lastname("stark").gender(Gender.FEMALE).address(address1).build();
        Person arya = Person.builder().firstname("arya").lastname("stark").gender(Gender.FEMALE).address(address2).build();
        Person bran = Person.builder().firstname("bran").lastname("stark").gender(Gender.MALE).address(address1).build();
        Person rickon = Person.builder().firstname("rickon").lastname("stark").gender(Gender.MALE).address(address2).build();
        Person jon = Person.builder().firstname("jon").lastname("snow").gender(Gender.MALE).address(address1).build();

        repository.save(eddard);
        repository.save(robb);
        repository.save(sansa);
        repository.save(arya);
        repository.save(bran);
        repository.save(rickon);
        repository.save(jon);

        List<Person> starks = repository.findByLastname(eddard.getLastname());
        System.out.println("Person ="+starks.size());
    }
}

Answer 1

在回答之前，您介意分享一下您的 RedisTemplate 实现代码吗？ （或者这是由 @RedisHash 注释生成的？）我自己是 Spring-Data-Redis 的新手，不知道 @RedisHash 注释并想查看它。

无论如何，基本上这里发生的是 Spring-Data-Redis 存储库将 Person 对象插入到 Redis 原生支持的不同数据结构中以用于不同目的。

Redis 支持不同的数据结构，例如：

1. 哈希 Redis 创建一个字符串字段和字符串值的映射来表示您的整个 Person 对象。 如果您执行HGETALL persons:{your person id}，它将显示与您的人员对象关联的所有不同字段和值

   HASH holding property values for id "c5cfd49d-6688-4b83-a9b7-be55dd1c36ad" in keyspace "persons"

2. 设置 Redis 根据实体的字段插入基本的原始字符串和索引实体。因此，您的 Redis 数据库中有很多 SET 操作。你可以在你的数据集中看到firstName和lastName的索引

   SET holding all ids known in the keyspace "persons"

3. ZSet 这是Sorted Sets数据结构的Redis操作。这是一个有序的字符串集合。 来自 Redis 文档

   In short with sorted sets you can do a lot of tasks with great performance that are really hard to model in other kind of databases.

似乎 Spring Data 会自动将位置数据作为排序集插入以优化 CRUD 操作。

您可以在这里阅读更多内容：

https://github.com/spring-projects/spring-data-examples/blob/master/redis/repositories/README.md

https://redis.io/topics/data-types