Spring Data JDBC: Beyond the Obvious
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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.
Spring Data JDBC: Beyond the Obvious
- 1. Confidential │ ©2021 VMware, Inc. Spring Data JDBC Beyond the Obvious Jens Schauder (he/him) Spring Data Year 2 of the Pandemic
- 2. Confidential │ ©2021 VMware, 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 │ ©2021 VMware, Inc. Spring Data JDBC
- 4. Confidential │ ©2021 VMware, Inc. 4 Spring Data
- 5. Confidential │ ©2021 VMware, Inc. 5 Relational Databases
- 6. Confidential │ ©2021 VMware, Inc. 6 Strong Aggregates
- 7. Confidential │ ©2021 VMware, Inc. Challenges
- 8. Confidential │ ©2021 VMware, Inc. 8 User Defined IDs
- 9. Confidential │ ©2021 VMware, Inc. 9 User Defined IDs Use • JdbcAggregateTemplate.insert • Or a BeforeSaveCallback
- 10. Confidential │ ©2021 VMware, Inc. 10 JSON / Custom Conversions
- 11. Confidential │ ©2021 VMware, Inc. 11 JSON / Custom Conversions • Use a custom type • Register custom converters • Don’t forget @ReadingConverter / @WritingConverter
- 12. Confidential │ ©2021 VMware, Inc. 12 Bidirectional Relationships
- 13. Confidential │ ©2021 VMware, Inc. 13 Bidirectional Relationships (internal) Set the backreference whenever adding an inner entity.
- 14. Confidential │ ©2021 VMware, Inc. 14 Bidirectional Relationships (external) Use a custom query on the repository.
- 15. Confidential │ ©2021 VMware, Inc. 15 Caching
- 16. Confidential │ ©2021 VMware, Inc. 16 Caching Use Springs existing caching abstraction on the repository.
- 17. Confidential │ ©2021 VMware, Inc. 17 Eager Loading References
- 18. Confidential │ ©2021 VMware, 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 │ ©2021 VMware, 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 │ ©2021 VMware, Inc. 20 Questions?