Spring Data Rest 和自定义存储库 [英] Spring Data Rest and custom repositories

问题描述

是否可以使用自定义(spring 数据)存储库导出 REST 资源?

Is it possible to export REST resources with custom (spring data) repositories?

它是如何工作的?

我找不到任何例子.我也没有发现任何声称这是不可能的.

I cannot find any example. I also have not found any claim that it is impossible.

推荐答案

我们使用了这两种方法，目前都运行良好:

We used these two methods and both work fine so far:

• 实现自定义控制器以利用您的自定义服务层
• 实现自定义存储库工厂(例如从 RepositoryFactoryBeanSupport 扩展)，构建您自己的 PersistentEntityInformation 并手动处理自定义数据存储类型的 CRUD 操作.

• Implement custom controllers to utilize your custom service layer
• Implement a custom repository factory (e.g. extending from RepositoryFactoryBeanSupport), build your own PersistentEntityInformation and take care of CRUD ops manually for your custom data storage type.

更新:查看文档的这一章:向所有存储库添加自定义行为.这个想法是使用 @EnableJpaRepositories(repositoryBaseClass = MyRepositoryImpl.class) 用您自己的实现替换默认的特定于存储的实现.

UPDATE: Look into this chapter of the documentation: Adding custom behavior to all repositories. The idea is to replace the default storage-specific implementation with your own using @EnableJpaRepositories(repositoryBaseClass = MyRepositoryImpl.class).

如果您想构建自定义存储 SPI，那就是另一回事了.您可以使用 spring-data-keyvalue 并实现您自己的 您为 @EnableMapRepositories 指定的 KeyValueOperations bean.查看 spring-data-redis 源代码作为该实现的示例.这是最简单的解决方案.

If you want to build a custom storage SPI that's a different story. You can use a spring-data-keyvalue and implement your own KeyValueOperations bean that you specify for @EnableMapRepositories. Look into spring-data-redis source as an example of that implementation. That's the easiest solution.

从头开始为自己的存储库构建完整的 SPI 需要更多代码.我们遵循了 spring-data-elasticsearch 的来源.您可能需要实施:

Building a complete SPI for own repositories from scratch needs more code. We followed sources from spring-data-elasticsearch. You might need to implement:

• 元数据: CustomEntityInformation、CustomEntityMappingContext、CustomPersistentEntity、CustomPersistentProperty.
• 集成: @EnableCustomRepositories、CustomRepositoriesRegistrar、CustomRepositoryConfigurationExtension、CustomRepositoryFactory、<代码>CustomRepositoryFactoryBean.
• 实现: CustomRepository(基础接口)，CustomRepositoryImpl(默认实现).

• Metadata: CustomEntityInformation, CustomEntityMappingContext, CustomPersistentEntity, CustomPersistentProperty.
• Integration: @EnableCustomRepositories, CustomRepositoriesRegistrar, CustomRepositoryConfigurationExtension, CustomRepositoryFactory, CustomRepositoryFactoryBean.
• Implementation: CustomRepository (Base interface), CustomRepositoryImpl (Default implementation).

而且还需要一些额外的代码来支持spring-data-rest，比如搜索资源不会自动暴露，所以我们手动构建搜索资源.然后你可能想在顶部添加查询支持，等等.

And still needs some extra code for spring-data-rest support, for example, search resources are not exposed automatically, so we build search resources manually. Then you might want to add queries support on top, etc.

总而言之，答案是肯定的，可以通过实现自己的存储 SPI 来实现，但并不容易.应首先寻找其他解决方案，包括:

Summarizing, the answer is yes, possible by implementing own storage SPI, but not easy. Should first look for other solutions including:

• 预测
• 资源处理器
• 自定义控制器
• 其他 spring data rest定制 可能性

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