Spring Data Repositories - A Deep Dive

Slides of my talk at BedCon 2013 in Berlin, Germany.

Transcript

1. Spring Data Repositories A Deep Dive Oliver Gierke
2. Oliver Gierke Spring Data engineer Core / JPA / Mongo JPA Expert Group 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 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
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