Reactive Spring Data Mark Paluch @mp911de Christoph Strobl @stroblchristoph 1

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Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Spring Data Modules 3 JPA

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Spring Data Modules 4 JPA

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ image: Fire at the Bamber Family Home (FAL v.1.3 License)

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ image: Fire at the Bamber Family Home (FAL v.1.3 License)

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ image: Fire at the Bamber Family Home (FAL v.1.3 License)

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ image: Fire at the Bamber Family Home (FAL v.1.3 License)

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ image: Fire at the Bamber Family Home (FAL v.1.3 License)

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Today’s data access • Keep resources busy • Connection contention • Usually synchronous/blocking • Multiple requests • Asynchronous isn’t always a good answer X

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive data access • Asynchronous • Non Blocking • Event Driven • Data as stream 11

Publisher Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ image: Fire at the Bamber Family Home (FAL v.1.3 License) Subscriber Backpressure Stream / Flow Subscribe

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ What it takes… Project Reactor 3.1 Spring Framework 5.0 Spring Data 2.0 A reactive (asynchronous, ideally non-blocking) driver Optional: Spring Boot 2.0 (Milestone) 13

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ What about JDBC/JPA? JDBC is a blocking API JPA is a blocking API Sorry, no reactive JPA support 14

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Spring Data Reactive Template API Reactive Repository support Reduced feature set 15

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Imperative Template API 16 T insert(T objectToSave) void insertAll(Collection<…> objects) List find(Query query, Class type)

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Template API 17 Mono insert(T objectToSave) Mono insert(Mono objects) Flux find(Query query, Class type)

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Repository API 18 interface ReactivePersonRepository extends ReactiveCrudRepository {
 
 Flux findByLastname(String lastname);
 
 @Query("{ 'firstname': ?0 }")
 Mono customQuery(String firstname); Flux findByLastname(Mono lastname); }

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Repository API 19 interface ReactivePersonRepository extends ReactiveCrudRepository {
 
 Flux findByLastname(String lastname);
 
 @Query("{ 'firstname': ?0 }")
 Mono customQuery(String firstname); Flux findByLastname(Mono lastname); }

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Repository API 20 interface ReactivePersonRepository extends ReactiveCrudRepository {
 
 Flux findByLastname(String lastname);
 
 @Query("{ 'firstname': ?0 }")
 Mono customQuery(String firstname); Flux findByLastname(Mono lastname); }

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Repository API 21 interface ReactivePersonRepository extends ReactiveCrudRepository {
 
 Flux findByLastname(String lastname);
 
 @Query("{ 'firstname': ?0 }")
 Mono customQuery(String firstname); Flux findByLastname(Mono lastname); }

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Repository API 22 interface ReactivePersonRepository extends RxJava2CrudRepository {
 
 Flowable findByLastname(String lastname);
 
 @Query("{ 'firstname': ?0 }")
 Maybe customQuery(String firstname); Single findByLastname(Mono lastname); }

Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ Reactive Repository API 23 interface ReactivePersonRepository extends RxJava2CrudRepository {
 
 Flowable findByLastname(String lastname);
 
 @Query("{ 'firstname': ?0 }")
 Maybe customQuery(String firstname); Single findByLastname(Mono lastname); }

Learn More. Stay Connected. Spring Data Examples – Repository @ Github WebFlux Example – Repository @ Github 24 #springone @s1p

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