A relational database is still an industry standard for data persistence, while Hibernate is Java-framework #1 for building a persistence layer of our apps. Its features like Persistence Context, Dirty Checking, Lazy Loading, Action Queue, and Flush bring so much power... And so much complexity. There is literally no way to make Hibernate a simple lightweight framework. No worries, if you don't want to deal with complexity. There is always a choice. Spring Data JDBC is a super-simple framework that perfectly fits into your Spring application and brings you almost no magic. It's simple, predictable, and straightforward. And it's your new option for building a persistence layer.

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Hibernate vs. Spring Data JDBC
Taras Boychuk

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Thank you 🤗

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Let’s have fun 😀

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🙋Taras Boychuk ⛰
👨💻
👨🏫
📚
🇺🇦

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💁

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• Brief ORM overview
• Hibernate coding session
• Spring Data JDBC coding session
• Conclusion
Agenda

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Spring Data JDBCvs.
2001 2018

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ORM

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enterprise app

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Spring Boot
Spring Data JPA

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Let’s check out the code 💻

15. You should always know the
session boundaries 🏁

16. • 1-level cache
• Lazy loading
• Dirty checking
• Orphan removal
Application
⛔
⛔
⛔
⛔
Session
✅
✅
✅
✅

17. Event
Listener
Action
Action
Queue

18. 😱

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Session
Persistence
Context
Action Queue
Entities states SQL queries

20. Event
Updates Persistence Context
Creates an Action (SQL)
🔥
Event

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Action Queue
flush()
DB
🤔

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1. OrphanRemovalAction
2. EntityInsertAction or EntityIdentityInsertAction
3. EntityUpdateAction
4. CollectionRemoveAction
5. CollectionUpdateAction
6. CollectionRecreateAction
7. EntityDeleteAction
😲
Action Queue Order

23. Entity
Snapshot
copy
Object[]
Dirty checking

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Persistence
Context
Lazy Loading
Dirty Checking
Cascade
Operations
Orphan
Removal
Action Queue
Flush

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You couldn't imagine Hibernate complexity
if you didn't dive into it 😔

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There is always a choice – Spring Data JDBC

27. Spring Data JDBC
🤷
simple & lightweight alternative to JPA
Session
Lazy Loading
Dirty Checking

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Let’s check out the code 💻

29. Spring Data JDBC
• based on the idea of Aggregate Root (Domain Drive Design)
• supports Spring Data CRUD repository
• supports @Query (native)
• straightforward
• fast

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Which one will you choose?

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34. Spring Data JDBC

35. Confidential
35
z

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2003

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Spring Data JDBC

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Tools don't make a difference,
but people do

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See you