SpringOne2GX 2014: Spring Data REST - Data Meets Hypermedia

See a demo of Spring Data REST where three different front ends interact with a single back end to snap pictures and upload them to Spring-a-Gram, a $1B acquisition in the making!

Transcript

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/
   Spring Data REST
   Data Meets Hypermedia
   By Greg Turnquist, Roy Clarkson, Oliver Gierke
   

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2. 2
   Hypermedia is an
   adventure
   You only need a few
   tools
   But the results can be
   amazing
   

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5. Oliver Gierke
   • Spring Data master
   • Spring HATEOAS
   • Jürgenized
   • Drums, music, …
   5
   @olivergierke
   

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6. What is Spring Data REST?
   • Implements common patterns on top of repositories
   • Collection / Item resources
   • Association resources
   • Search resources
   • Supports
   • JPA, GemFire, Neo4j, MongoDB
   • Others are coming…
   6
   

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8. What is Spring Data REST?
   • Leverages hypermedia & internet standards
   • HAL (draft)
   • ALPS (draft)
   • URI Templates (RFC 6570)
   • text/uri-list mediatype (RFC 2483)
   • profile link relation (RFC 6906)
   8
   You aren’t building a
   “Spring Data REST”
   app, but instead a
   RESTful standards-
   based app.
   

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9. 9
   HAL
   

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10. 10
    Hypertext Application Language
    A lean hypermedia type
    application/hal+json
    HAL
    Adopting HAL will make your API explorable, and
    its documentation easily discoverable from within
    the API itself. — Mike Kelly, HAL spec lead
    

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11. 11
    haltalk.herokuapp.com
    HAL
    

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12. What is Spring Data REST?
    • What is ALPS?
    12
    

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13. Greg Turnquist
    • Spring Data REST
    • Spring Boot
    • Spring anything…
    • Getting started guides
    13
    Learning
    Spring Boot
    @gregturn
    

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14. Architecture
    14
    GET /api
    Spring-a-Gram MVC SQL
    Spring
    Data
    Spring
    Mobile
    Spring
    Android
    Spring
    Hateoas
    Spring
    Framework
    

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15. 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/
    Demo: Spring-a-Gram
    

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16. 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/
    Spring Data REST
    Data Meets Hypermedia
    By Greg Turnquist, Roy Clarkson, Oliver Gierke
    

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17. Hi, my name is Roy Clarkson
    17
    @royclarkson
    

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18. 18
    Demo
    Spring-a-Gram
    Demo
    

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19. Built with Spring components
    19
    Spring for
    Android
    Spring
    HATEOAS
    

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20. What problem are we trying to solve?
    20
    

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21. Android REST client
    • Consistent
    programming model
    • Powerful
    • Extensible
    21
    

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22. Spring Framework vs Spring for Android
    • Core
    • RestTemplate
    22
    https://github.com/spring-projects/spring-android
    http://projects.spring.io/spring-android
    

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23. HTTP Methods
    • DELETE - delete(...)
    • GET - getForObject(...)
    • HEAD - headForHeaders(...)
    • OPTIONS - optionsForAllow(...)
    • POST - postForLocation(...)
    • PUT - put(...)
    • any HTTP operation - exchange(...) and execute(...)
    23
    

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24. RestTemplate Example
    24
    RestTemplate restTemplate = new RestTemplate();!
    String url = "http://example.com/hotels/{hotel}/bookings/{booking}";!
    String result = restTemplate.getForObject(url, String.class, "42", “21”);!
    

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25. HTTP Message Converters
    • MappingJackson2HttpMessageConverter -
    object to JSON marshaling supported via the
    Jackson JSON Processor
    • GsonHttpMessageConverter - object to JSON
    marshaling supported via Google Gson
    • SimpleXmlHttpMessageConverter - object to
    XML marshaling supported via the Simple XML
    Serializer
    25
    

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26. Spring for Android 2.0.0.M1
    • Generics
    • OkHttp
    • API parity
    • Dependency updates
    • Bug fixes
    • Based on Spring
    Framework 3.2.x
    26
    

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27. Supported Android Versions
    27
    https://developer.android.com/about/dashboards/index.html
    

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28. HTTP Clients
    • Native
    • Standard J2SE facilities (UrlConnection)
    • HttpComponents HttpClient 4.1
    • Third Party
    • OkHttp
    • HttpComponents HttpClient 4.3
    28
    

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29. Generics
    29
    ParameterizedTypeReference> typeRef =!
    new ParameterizedTypeReference>() { };!
    !
    ResponseEntity> responseEntity = !
    restTemplate.exchange(url, HttpMethod.GET, requestEntity, typeRef);
    

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30. Project Roadmap
    • HttpComponents 4.3
    • AsyncRestTemplate
    • Improved Spring Social
    integration
    • Improved Spring
    HATEOAS integration
    • WebSocket
    • Differential Sync
    30
    

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31. Getting Started Guides at http://spring.io/guides
    • Consuming a RESTful Web Service with Spring for Android
    • Consuming XML from a RESTful Web Service with Spring
    for Android
    • Building Android Projects with Gradle
    • Building Android Projects with Maven
    • Installing the Android Development Environment
    31
    

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32. Let’s look at some code!
    32
    

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33. 33
    github.com/spring-projects/spring-data-rest
    github.com/spring-projects/spring-android
    github.com/SpringOne2GX-2014/spring-a-gram
    github.com/SpringOne2GX-2014/spring-a-gram-android
    Want to see more?
    Questions?
    

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