Reactive meets Data Access

Slides to the talk I gave at Devoxx PL 2017.

Links:
* Spring Data Examples: https://github.com/spring-projects/spring-data-examples
* Spring Data wiki: https://github.com/spring-projects/spring-data-commons/wiki
* Spring Project release calendar: https://spring-calendar.cfapps.io/
* Code: http://mp911.de/reactive-meets-data-access-code

Transcript

1. @mp911de
   #DevoxxPL
   Platinum Sponsor:
   Reactive meets
   Data Access
   Mark Paluch
   Pivotal
   

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2. 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
   2
   Request Data access
   Remote data
   service
   I/O Wait
   !
   This one is
   waiting
   

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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
   Multiple
   calls
   Bulk fetch
   !
   

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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/
   Asynchronous data access
   4
   Request Data access
   Requires
   synchronization
   Still waiting, eh?
   "
   #
   $
   

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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/
   5
   

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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/
   6
   

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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/
   7
   

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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/
   8
   

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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/
   9
   

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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/
    Conditional asynchronous access
    10
    % Future Hell
    

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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/
    ! Keep resources busy
    ! Connection contention
    ! Usually synchronous/blocking
    ! Multiple requests
    ! Asynchronous isn’t always a good answer
    11
    Todays’ Data Access
    

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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/
    Scaling
    12
    &
    &
    &
    & & & &
    & & & &
    & & & &
    & & & &
    

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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/
    Change the level of abstraction
    13
    Data as Stream
    Reactive execution model
    

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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/
    14
    List
    Iterator
    Future
    Future>
    .get()
    for-each .hasNext()
    Request thread pulls
    

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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/
    15
    Publisher
    I/O thread
    push
    

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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/
    16
    Publisher
    Stream
    (Publisher)
    Subscriber
    Demand
    Data
    

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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/
    ! Immutable
    ! Push-Stream
    ! Iterator, java.stream.Stream are Pull-Streams
    ! Demand-Aware (Backpressure)
    17
    Reactive Streams
    

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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/
    Going reactive with Spring Data
    18
    Project Reactor 3.0 Spring Data 2.0
    Spring Framework 5.0
    

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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/
    19
    Mono
    Flux
    0..1..Error
    0..N..Error
    

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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 Template API
    ! Reactive Repository support
    ! Supported data stores (Reactive Streams)
    ! MongoDB
    ! Apache Cassandra
    ! Redis
    ! Couchbase (RxJava 1 driver)
    20
    Spring Data
    

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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/
    21
    Reactive Template API
    Mono insert(T objectToSave)
    Mono insert(Mono objectToSave)
    

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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/
    22
    Let’s code…
    

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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/
    23
    Spring Data 2.0
    Java 8 API
    Ready for Java 9
    Fluent MongoDB API
    MongoDB Collation support
    Elasticsearch 5.4
    Cassandra Lightweight transactions
    Cassandra Query & Update objects
    Composable repositories Kotlin extensions
    On the way to non-null API
    Consistent CRUD repository method names
    MongoDB Document API
    New Redis Cache
    Cassandra module merge
    

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24. 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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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/
    Resources
    ! Spring Data Examples – Repository @ Github
    ! Spring Data wiki (Release trains, planning) – Wiki
    ! Spring projects release calendar – Google Calendar
    ! Slides – Speakerdeck (mp911.de/reactive-meets-data-access)
    ! Code – GitHub (mp911.de/reactive-meets-data-access-code)
    ! Chat with us on Gitter!
    25
    @mp911de
    

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