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Reactive Spring Data
Mark Paluch @mp911de
Christoph Strobl @stroblchristoph
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Spring Data Modules
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JPA

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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/
Reactive Spring Data Modules
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JPA

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Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
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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/
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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/
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/

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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/
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/
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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/
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/
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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/
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/
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9.
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/
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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/
Reactive data access
• Asynchronous
• Non Blocking
• Event Driven
• Data as stream
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Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Publisher
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Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
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Subscriber
Backpressure
Stream / Flow
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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)
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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
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Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
Reactive Spring Data
Reactive Template API
Reactive Repository support
Reduced feature set
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Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
Imperative Template API
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<T> T insert(T objectToSave)
void insertAll(Collection<…> objects)
<T> List<T> find(Query query, Class<T> type)

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Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
Reactive Template API
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<T> Mono<T> insert(T objectToSave)
<T> Mono<T> insert(Mono<T> objects)
<T> Flux<T> find(Query query, Class<T> type)

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Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
Reactive Repository API
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interface ReactivePersonRepository extends
ReactiveCrudRepository<Person, String> {
Flux<Person> findByLastname(String lastname);
@Query("{ 'firstname': ?0 }")
Mono<Person> customQuery(String firstname);
Flux<Person> findByLastname(Mono<String> lastname);
}

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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/
Reactive Repository API
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interface ReactivePersonRepository extends
ReactiveCrudRepository<Person, String> {
Flux<Person> findByLastname(String lastname);
@Query("{ 'firstname': ?0 }")
Mono<Person> customQuery(String firstname);
Flux<Person> findByLastname(Mono<String> lastname);
}

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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/
Reactive Repository API
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interface ReactivePersonRepository extends
ReactiveCrudRepository<Person, String> {
Flux<Person> findByLastname(String lastname);
@Query("{ 'firstname': ?0 }")
Mono<Person> customQuery(String firstname);
Flux<Person> findByLastname(Mono<String> lastname);
}

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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/
Reactive Repository API
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interface ReactivePersonRepository extends
ReactiveCrudRepository<Person, String> {
Flux<Person> findByLastname(String lastname);
@Query("{ 'firstname': ?0 }")
Mono<Person> customQuery(String firstname);
Flux<Person> findByLastname(Mono<String> lastname);
}

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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/
Reactive Repository API
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interface ReactivePersonRepository extends
RxJava2CrudRepository<Person, String> {
Flowable<Person> findByLastname(String lastname);
@Query("{ 'firstname': ?0 }")
Maybe<Person> customQuery(String firstname);
Single<Person> findByLastname(Mono<String> lastname);
}

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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/
Reactive Repository API
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interface ReactivePersonRepository extends
RxJava2CrudRepository<Person, String> {
Flowable<Person> findByLastname(String lastname);
@Query("{ 'firstname': ?0 }")
Maybe<Person> customQuery(String firstname);
Single<Person> findByLastname(Mono<String> lastname);
}

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

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Disclaimer

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Attribution-NonCommercial license: http://creativecommons.org/licenses/by -nc/3.0/
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