What's new in Spring Data?

Slides of the talk, Christoph Strobl, Thomas Darimont and me held at SpringOne2GX 2014 in Dallas, TX. Introducting the latest features of the Spring Data umbrella project. @springcentral

Transcript

1. © 2014 SpringOne 2GX. All rights reserved. Do not distribute without permission. What’s new in Spring Data? Oliver Gierke - Thomas Darimont - Christoph Strobl
2. Agenda Overview Repositories Store modules Q&A
3. Release train
4. ! • Release coordination effort make sure modules are compatible • Reduce different versions into a single canonical name to refer to Release train 03/2013 Arora 09/2013 Babbage 02/2014 Codd 05/2014 Dijkstra 09/2014 Evans
5. Spring Data Modules Core Neo4j Gemfire JPA Solr Elasticsearch REST Cassandra Couchbase Redis MongoDB Community
 modules Core
 modules
6. Module setup - Codd Core Neo4j Gemfire JPA Solr Elasticsearch REST Cassandra Couchbase Redis MongoDB Community
 modules Core
 modules
7. Module setup - Dijkstra / Evans Core Neo4j Gemfire JPA Solr Elasticsearch REST Cassandra Couchbase Redis MongoDB Community
 modules Core
 modules
8. Evans GA! Hooray! \o/
10. Spring Data Evans - Major themes • Upgrade to Spring 4.0 • Support for top/first keywords in derived queries • Support for MongoDB 2.6 features like text search • SpEL support for Spring Data JPA (Spring Security integration) • Redis Sentinel support • ALPS and excerpt projections for Spring Data REST • Improved multi-store configuration • Asciidoctor for reference documentation
11. Spring Data
 Repositories Pragmatic data access APIs
12. Multi-store
 configuration We know what you were thinking!
13. Improved multi-store configuration ! • Triggered if multiple Spring Data modules are detected • Modules only register for interfaces that a assigned to the store • Annotations on domain types (@Entity, @Document) • Store specific repository base interface (not recommended)
14. Debug output … DEBUG … - Multiple Spring Data modules found, entering strict repository configuration mode! ! … DEBUG … - Spring Data JPA - Could not safely identify store assignment for repository candidate interface ….OrderRepository. ! … DEBUG … - Spring Data JPA - Registering repository:
 Interface: ….CustomerRepository Factory: ….JpaRepositoryFactoryBean
15. Query methods
16. Slices Paging without the overhead
17. Slices ! • Pagination • Additional query to calculate the total number of elements ! • Slices • Reads one more element than necessary to find out about presence of next slice (optional) • Store-specific optimization
18. (Optional) support No more NullPointerExceptions with Java 8 or Guava
19. Default methods
20. Slices and Optional example interface SampleRepository implements Repository<User, Long> { Slice<User> findByLastname(String lastname, Pageable page); ! Optional<User> findByEmailAddress(EmailAddress email); ! Optional<User> findByLastname(String lastname); ! default Optional<Customer> findByLastname(Customer c) { return findByLastname(c == null ? null : c.lastname); } }
21. Limiting result sets You’r only interested in the top ones anyway, right?
22. Limiting result sets ! • Previous options • Use Pageable/Page to dynamically restrict results • Additional keywords to statically restrict results interface SampleRepository implements Repository<User, Long> { List<User> findTop10ByNameLike(String name, Sort sort); }
23. Derived
 delete queries
24. Demo
25. Miscellaneous
26. CDI improvements Eager instantiation and custom implementations
27. Common
 geo-spatial types
28. NullsFirst /
 NullsLast
29. Store module
 improvements
30. JPA Java Persistence API 2.1 support
31. JPA Improvements ! • JPA 2.1 support • Execution of stored procedures • Support for entity graph definitions ! • Integration with Spring Security • Out of the box support coming with Spring Security 4.1
32. Demo
33. MongoDB
34. Aggregation go on with system variables
35. Aggregation Framework ! • System Variables • $$ROOT • $$CURRENT Aggregation aggregation = Aggregation.newAggregation( group(„foo"). push(Aggregation.ROOT).as("users"));
36. Query Modifiers Alter query behavior
37. Query Modifiers • Define output and behavior of query • $comment • $maxTimeMS • … interface SampleRepository implements Repository<User, Long> { @Meta(comment=“s2gx2014”) List<User> findByFirstname(String firstname); }
38. Full $text search Simple - Powerful - Easy
39. Text Search ! • Supported since MongoDB 2.6 • Multiple stemmers • Different languages interface SampleRepository implements Repository<User, Long> { List<User> findAllBy(TextCriteria criteria); }
40. Redis
41. SCAN The non-blocking alternative
42. SCAN Support • Non-blocking alternative • KEYS • SMEMBERS Cursor<String> keys = redisConnection.scan(); ! while(cursor.hasNext()) { cursor.next(); }
43. Sentinel Monitoring & failover for your cluster
44. Sentinel Support ! • Monitoring and failover • Currently only available using Jedis @Bean public RedisSentinelConfiguration sentinelConfig() { return new RedisSentinelConfiguration().master("mymaster") .sentinel("localhost", 26379) .sentinel("localhost", 26380); }
45. Sentinel support Redis
46. Sentinel support Redis Redis Redis
47. Sentinel support Redis Redis Redis Sentinel Sentinel Sentinel
48. Sentinel support Redis Redis Redis Sentinel Sentinel Sentinel
49. Sentinel support Redis Redis Redis Sentinel Sentinel Sentinel
50. Sentinel support Redis Redis Redis Sentinel Sentinel Sentinel
51. Sentinel support Redis Redis Redis Sentinel Sentinel Sentinel
52. Sentinel support Redis Redis Redis Sentinel Sentinel Sentinel
53. Sentinel support Redis Redis Redis Sentinel Sentinel Sentinel
54. Solr
55. Deep pagination Go deep at top speed
56. Deep pagination ! • Performance boost when going deep • Uses cursor Cursor<User> cursor = template.queryForCursor(q, User.class); ! while(cursor.hasNext()) { User user = cursor.next(); }
57. Schema Support Client side schema management
58. Schema Support ! • Usage of Schema Solr REST API • Add new fields to existing schema. @Configuration @EnableSolrRepositories(schemaCreationSupport = true) class SolrConfiguration { ! }
59. Spring Data REST
60. Spring Data REST • Implements common patterns on top of repositories • Collection / item resources • Association resources • Search resources • Leverages hypermedia and internet standards • URI Templates (RFC 6570) • application/hal+json • text/uri-list (RFC 2483) • profile link relation (RFC 6906)
61. ALPS support & excerpt projections ! • Application Level Profile Semantics • Spring Data REST exposes resources describing the service ! • Interface-based programming model to define custom projections • Configuration to define excerpt projections
62. Demo
63. Related talks
64. Spring Data Related Talks • Cassandra / Couchbase - Tue, 4:30 pm • Cassandra, Couchbase and Spring Data in the Enterprise • Spring Data BOF - Tue, 9:00 pm • REST - Wed, 8:30 am • Spring Data REST - Data Meets Hypermedia • Neo4j - Wed, 10:30 am • Artistic Spring Data Neo4j 3.0 with Spring Boot and Van Goch • GORM - Wed, 12:45 pm • Advanced GORM – Beyond Relational
65. Sample code https://github.com/SpringOne2GX-2014/whats-new-in-spring-data
66. Questions?