Spring Boot 2.0 Web Applications

The new generation of Spring Boot applications is here! With Spring Boot 2.0, developers can use the new Spring WebFlux reactive web framework.

During this live coding session, Stéphane and Brian will create a WebFlux application and leverage Boot features such as Actuator, Developer Tools and more.

Spring Boot 2.0 comes with many improvements and new features - Spring WebFlux allows reactive web endpoints and new HTTP runtimes such as Netty. This comes into two variants: a familiar annotation based approach similar to MVC and a new functional variant called "WebFlux.fn".

With 2.0, the Spring team leverages WebFlux with the "convention over configuration" flavour that made Boot so popular:

* auto-configuration of your web application
* customizing your app with configuration properties and callback-based interfaces
* Actuators and Developer Tools support
* leveraging the Spring ecosystem such as Spring Data and Spring Security

Transcript

1. Spring Boot 2.0 Web Applications
   Stéphane Nicoll - @snicoll
   Brian Clozel - @bclozel
   

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2. Spring Framework 5.0
   JDK 8 and JDK 9, Reactive programming with Spring WebFlux
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3. 3
   
   
   ∞
   

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4. Threading model
   Not relying on the “1 thread/request” model
   Using non-blocking IO (see NIO Selectors)
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5. Flux and Mono
   Reactive Streams implementation,
   Powerful for concurrency and streaming use cases
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6. Spring Boot 2.0
   Bringing the Spring Boot experience to the Reactive world,
   Leveraging reactive features in all Spring projects
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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/
   Smart Meter Applications
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   Aggregator
   Dashboard
   
   
   
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8. #devoxx #springboot
   Demo - Smart Sensors
   

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9. Template engine integration
   How to deal with Flux at the view model level?
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10. Thymeleaf 3.0 reactive support
    Flushing strategies for progressive rendering - “chunked mode”
    Rendering template fragments as SSE events - “data-driven mode”
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11. Spring Data Kay
    Reactive support for Redis, MongoDB, Couchbase and Cassandra
    Infinite streams from the datastore with @Tailable
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12. #devoxx #springboot
    Demo - Dashboard
    

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13. Spring Boot Actuator
    Works now with Spring MVC, Spring WebFlux and Jersey
    Unified way to implement custom endpoints
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14. Spring Boot Actuator
    Better output format
    Separate status endpoint
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15. Spring Boot Actuator
    Simplified Security model
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16. Spring Boot Actuator
    Move to Micrometer
    Think SLF4J, but for metrics
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    • Instrument without vendor lock-in:
    • Prometheus
    • Netflix Atlas
    • Influx
    • Datadog
    • Statsd
    • Graphite
    • …
    • Multi-dimensional metrics
    

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17. Spring Boot soon in RC phase
    Check out release notes and our (WIP) migration guide!
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18. #devoxx #springboot
    Demo - Actuator
    

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19. #devoxx #springboot
    Thanks!
    @snicoll @bclozel on Twitter
    https://gitter.im/spring-projects/spring-boot
    

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