Spring Data Repositories - A Deep Dive

Transcript

1. Spring Data Repositories A Deep Dive Oliver Gierke

2. Oliver Gierke SpringSource Spring Data modules Core / JPA /

   Mongo ogierke@vmware.com www.olivergierke.de olivergierke

3. Hands on

4. Sample code https://github.com/olivergierke/ repositories-deepdive

5. Step 0 Initial project setup

6. Summary Use kickstart projects to ease setup

7. Step 1 Basic JPA infrastructure setup

8. "Persistence technology of choice is JPA. e application uses JavaConfig

   and sample data contained in data.sql.

9. Summary Easy setup through JavaConfig XML-less JPA configuration

10. Step 2 Quickstart

11. "e implementation of the persistence layer will be based on

    the Spring Data repositories abstraction. Customers can be saved, looked up by their id, email address.

12. Summary Interface-based programming model No implementation required Queries derived from

    method names

13. Step 3 Extended CRUD methods

14. " Customers can be deleted and obtained all at once.

15. Summary Switched to CrudRepository Exposed CRUD methods Broad API exposed

16. Step 4 Pagination

17. "Customers can be accessed page by page.

18. Summary Switched to PagingAndSortingRepository Exposed CRUD methods and paging ones

    Broad API exposed

19. Step 5 Re-declaring existing CRUD methods

20. "CustomerRepository.findAll() should rather return a List. e transaction timeout for

    save(…) should be customized to 10 seconds.

21. Summary Re-declare methods to customize Return types Annotation config (Tx,

    Locking)

22. Step 6 Introducing a read-only repository base interface

23. "Products shall be accessible in read-only mode only.

24. Summary Craft custom base interface Return types Annotation config (Tx,

    Locking)

25. Step 7 Using manually defined queries

26. "As a user, I want to look up products by

    their custom attributes.

27. Summary @Query annotation JPA named queries Spring Data named queries

28. Step 8 Flexible predicate execution

29. "As a user, I want to search for customers by

    firstname, lastname, email address and any combination of them

30. Summary Querydsl - type safe queries for Java QuerydslPredicateExecutor

31. Side track: Repository proxies

32. Proxy mechanism Using Spring's JDK proxy support Bootstrap through Factory

    Spring FactroyBean / CDI XML namespace / @EnableRepositories

33. Proxy mechanism Query interface CRUD implementation class QueryDslPredicateExecutor Custom implementation

    extension

34. Step 9 Custom implementations for repositories

35. "As an admin user, I'd like to delete all products

    beyond a given price.

36. Summary Provide custom implementation Base class support (Querydsl)

37. Stuff on top Spring MVC integration Spring Data REST Spring

    Roo

38. Up and beyond

39. Supported modules JPA MongoDB Neo4j Gemfire

40. Community implementations Spring Data Solr Couchbase Elasticsearch FuzzyDB

41. Summary

42. Interface-based programming model

43. Start simple, get more sophisticated

44. Declarative query execution

45. Flexible predicate execution

46. Custom implementation

47. CDI integration

48. Spring Data Modern Data Access For Enterprise Java NoSQL JPA

    JDBC Redis Big Data Hadoop HBase MongoDB Neo4j REST exporter Roo Hive Pig Querydsl Repositories Gemfire Splunk Free JPA chapter - http://bit.ly/sd-book-chapter

49. Spring Data Book http://bit.ly/sd-book

50. Questions?

51. Thank you!

52. Code https://github.com/olivergierke/ repositories-deepdive https://github.com/olivergierke/ spring-restbucks