Reactive Spring Data

Slides to the SpringOne Platform 2017 talk.

Links:

* Spring Data Examples: https://github.com/spring-projects/spring-data-examples
* WebFlux Example: https://github.com/mp911de/reactive-spring/tree/redis-message-container

Transcript

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

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3. 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
   

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4. 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
   

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5. 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)
   

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6. 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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7. 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)
   

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8. 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)
   

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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/
   image: Fire at the Bamber Family Home (FAL v.1.3 License)
   

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10. 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)
    

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11. 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
    

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12. 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
    

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13. 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
    

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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/
    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
    

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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/
    What about JDBC/JPA?
    JDBC is a blocking API
    JPA is a blocking API
    Sorry, no reactive JPA support
    14
    

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16. 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
    

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17. 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)
    

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18. 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)
    

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19. 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);
    }
    

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20. 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);
    }
    

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21. 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);
    }
    

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22. 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);
    }
    

    View Slide

23. 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);
    }
    

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24. 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);
    }
    

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

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26. Disclaimer
    

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27. 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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    26
    

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