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Spring Data JDBC: Beyond the Obvious
This document discusses the features and functionalities of Spring Data JDBC, including user-defined IDs, JSON/custome conversions, bidirectional relationships, caching, and eager loading references. It highlights the challenges associated with these features and clarifies that the information presented is for informational purposes only, with no commitment from VMware for delivery. Additional resources for further reading are provided, along with a disclaimer regarding the development status of the features mentioned.
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- 1. Confidential │ ©2021VMware, Inc. Spring Data JDBC Beyond the Obvious Jens Schauder (he/him) Spring Data Year 2 of the Pandemic
- 2. Confidential │ ©2021VMware, Inc. 2 This presentation may contain product features or functionality that are currently under development. This overview of new technology represents no commitment from VMware to deliver these features in any generally available product. Features are subject to change, and must not be included in contracts, purchase orders, or sales agreements of any kind. Technical feasibility and market demand will affect final delivery. Pricing and packaging for any new features/functionality/technology discussed or presented, have not been determined. The information in this presentation is for informational purposes only and may not be incorporated into any contract. There is no commitment or obligation to deliver any items presented herein. Disclaimer
- 3. Confidential │ ©2021VMware, Inc. Spring Data JDBC
- 4. Confidential │ ©2021VMware, Inc. 4 Spring Data
- 5. Confidential │ ©2021VMware, Inc. 5 Relational Databases
- 6. Confidential │ ©2021VMware, Inc. 6 Strong Aggregates
- 7. Confidential │ ©2021VMware, Inc. Challenges
- 8. Confidential │ ©2021VMware, Inc. 8 User Defined IDs
- 9. Confidential │ ©2021VMware, Inc. 9 User Defined IDs Use • JdbcAggregateTemplate.insert • Or a BeforeSaveCallback
- 10. Confidential │ ©2021VMware, Inc. 10 JSON / Custom Conversions
- 11. Confidential │ ©2021VMware, Inc. 11 JSON / Custom Conversions • Use a custom type • Register custom converters • Don’t forget @ReadingConverter / @WritingConverter
- 12. Confidential │ ©2021VMware, Inc. 12 Bidirectional Relationships
- 13. Confidential │ ©2021VMware, Inc. 13 Bidirectional Relationships (internal) Set the backreference whenever adding an inner entity.
- 14. Confidential │ ©2021VMware, Inc. 14 Bidirectional Relationships (external) Use a custom query on the repository.
- 15. Confidential │ ©2021VMware, Inc. 15 Caching
- 16. Confidential │ ©2021VMware, Inc. 16 Caching Use Springs existing caching abstraction on the repository.
- 17. Confidential │ ©2021VMware, Inc. 17 Eager Loading References
- 18. Confidential │ ©2021VMware, Inc. 18 Eager Loading References Create an entity defining the required combination of aggregates (or their pieces) Use a dedicated repository or custom queries to load it. You may want to “persist” the query as a database view.
- 19. Confidential │ ©2021VMware, Inc. 19 Resources Source: https://github.com/schauder/talk-beyond SD JDBC: https://github.com/spring-projects/spring-data-jdbc Required Reading:https://spring.io/blog/2018/09/24/spring-data- jdbc-references-and-aggregates SO: https://stackoverflow.com/questions/tagged/spring-data-jdbc Twitter: https://twitter.com/jensschauder
- 20. Confidential │ ©2021VMware, Inc. 20 Questions?