Going reactive with Spring Data

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1. Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
   
   Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
   Going reactive with Spring Data
   Mark Paluch, Pivotal Software, Inc.
   @mp911de
   

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2. Unless otherwise indicated, these slides are © 2013-2016 Pivotal Software, Inc. and licensed under a
   
   Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
   @mp911de
   github.com/mp911de
   paluch.biz
   Mark Paluch
   

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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/
   Accessing Data today
   3
   Request Data access
   Remote data
   service
   

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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/
   Accessing Data today
   3
   Request Data access
   Remote data
   service
   

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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/
   Accessing Data today
   3
   Request Data access
   Remote data
   service
   I/O Wait
   

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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/
   Accessing Data today
   3
   Request Data access
   Remote data
   service
   I/O Wait
   

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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/
   Accessing Data today
   3
   Request Data access
   Remote data
   service
   I/O Wait
   This one is
   waiting
   

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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/
   Accessing Data today
   3
   Request Data access
   Remote data
   service
   I/O Wait
   This one is
   waiting
   

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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/
   Accessing Data today
   4
   Request Data access
   Remote data
   service
   

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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/
    Accessing Data today
    4
    Request Data access
    Remote data
    service
    Bulk fetch
    

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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/
    Accessing Data today
    4
    Request Data access
    Remote data
    service
    Multiple
    calls
    Bulk fetch
    

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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/
    Accessing Data today
    4
    Request Data access
    Remote data
    service
    Multiple
    calls
    Bulk fetch
    

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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/
    Accessing Data today
    4
    Request Data access
    Remote data
    service
    Multiple
    calls
    Bulk fetch
    

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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/
    Asynchronous data access
    5
    Request Data access
    
    
    

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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/
    Asynchronous data access
    5
    Request Data access
    
    
    

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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/
    Asynchronous data access
    5
    Request Data access
    
    
    

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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/
    Asynchronous data access
    5
    Request Data access
    
    
    

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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/
    Asynchronous data access
    5
    Request Data access
    Requires
    synchronization
    
    
    

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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/
    Asynchronous data access
    5
    Request Data access
    Requires
    synchronization
    Still waiting, eh?
    
    
    

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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/
    Asynchronous data access
    5
    Request Data access
    Requires
    synchronization
    Still waiting, eh?
    
    
    

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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/
    Conditional asynchronous access
    6
    

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22. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    7
    

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    Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
    8
    

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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/
    9
    

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25. 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/
    10
    

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26. 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/
    11
    

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27. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    Conditional asynchronous access
    12
    Future Hell
    

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28. 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/
    Conditional asynchronous access
    12
    Future Hell
    

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29. 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/
    ! Keeps more Threads busy
    ! Transformation improved (since Java 5, java.util.concurrent)
    ! Processing starts at the time all elements are available (effectively)
    13
    Asynchronous Data Access
    

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30. 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/
    ! Keep resources busy
    ! Connection contention
    ! Usually synchronous/blocking
    ! Multiple requests
    ! Asynchronous isn’t always a good answer
    14
    Todays’ Data Access
    

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31. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    Scaling
    15
    

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32. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    Scaling
    15
    
    
    
    
    

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33. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    Scaling
    15
    
    
    
    
    
    
    
    

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34. 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/
    Change the level of abstraction
    16
    Data as Stream
    Reactive execution model
    

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35. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    17
    List
    Iterator
    Future
    Future>
    

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36. 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/
    17
    List
    Iterator
    Future
    Future>
    .get()
    for-each .hasNext()
    

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37. 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/
    17
    List
    Iterator
    Future
    Future>
    .get()
    for-each .hasNext()
    Request thread pulls
    

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38. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    18
    Publisher
    

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39. 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/
    18
    Publisher
    I/O thread
    push
    

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40. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    19
    Publisher
    Stream
    (Publisher)
    Subscriber
    Demand
    Data
    

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41. 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/
    19
    Publisher
    Stream
    (Publisher)
    Subscriber
    Demand
    Data
    

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42. 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/
    20
    Publisher
    Stream
    (Publisher)
    Subscriber
    Demand
    Data
    

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43. 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/
    20
    Publisher
    Stream
    (Publisher)
    Subscriber
    Demand
    Data
    

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44. 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/
    ! Immutable
    ! Push-Stream
    ! Iterator, java.stream.Stream are Pull-Streams
    ! Demand-Aware (Backpressure)
    21
    Reactive Streams
    

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45. 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/
    Going reactive with Spring Data
    22
    Project Reactor 3.0 Spring Data 2.0
    Spring Framework 5.0
    

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46. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    23
    Mono
    Flux
    

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47. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    23
    Mono
    Flux
    0..1..Error
    0..N..Error
    

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48. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    ! Reactive Template API
    ! Reactive Repository support
    ! Supported data stores (Reactive Streams)
    ! MongoDB
    ! Apache Cassandra
    ! Redis
    24
    Spring Data
    

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49. 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/
    25
    Reactive Template API
    Mono insert(T objectToSave)
    Mono insert(Mono objectToSave)
    

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50. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    26
    Demo
    Reactive Template API
    

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51. Unless otherwise indicated, these slides are © 2013-2017 Pivotal Software, Inc. and licensed under a
    
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    27
    Reactive Repository API
    public interface ReactivePersonRepository extends
    ReactiveCrudRepository {

    

    Flux findByLastname(String lastname);

    

    @Query("{ 'firstname': ?0 }")

    Mono customQuery(String firstname);
    Flux findByLastname(Mono lastname);
    }
    

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52. 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/
    28
    Reactive Repository API
    public interface ReactivePersonRepository extends
    ReactiveCrudRepository {

    

    Flux findByLastname(String lastname);

    

    @Query("{ 'firstname': ?0 }")

    Mono customQuery(String firstname);
    Flux findByLastname(Mono lastname);
    }
    

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53. 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/
    29
    Reactive Repository API
    public interface ReactivePersonRepository extends
    ReactiveCrudRepository {

    

    Flux findByLastname(String lastname);

    

    @Query("{ 'firstname': ?0 }")

    Mono customQuery(String firstname);
    Flux findByLastname(Mono lastname);
    }
    

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54. 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/
    30
    Reactive Repository API
    public interface ReactivePersonRepository extends
    ReactiveCrudRepository {

    

    Flux findByLastname(String lastname);

    

    @Query("{ 'firstname': ?0 }")

    Mono customQuery(String firstname);
    Flux findByLastname(Mono lastname);
    }
    

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55. 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/
    31
    Demo
    Reactive Repositories
    

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56. 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/
    ! End-to-End reactive experience
    ! RxJava Interoperability at Repository level
    ! Infinite Streams
    ! MongoDB Tailable Cursors
    ! Redis Pub/Sub
    32
    Spring Data Reactive Features
    

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57. Unless otherwise indicated, these slides are © 2013-2016 Pivotal Software, Inc. and licensed under a
    
    Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
    Feedback Welcome
    

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58. 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/
    Resources
    ! Spring Data Examples – Repository @ Github
    ! Spring Data wiki (Release trains, planning) – Wiki
    ! Spring projects release calendar – Google Calendar
    ! Slides – Speakerdeck (mp911.de/going-reactive)
    ! Chat with us on Gitter!
    34
    @mp911de
    

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