1. Building Reactive Applications
James Ward
www.jamesward.com
@_JamesWard
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2. Agenda
•Intro to Reactive
•The Typesafe Platform
–Typesafe Activator
–Play Framework
–Akka
–Scala
–Tools
•Questions
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3. Software is becoming Reactive
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4. Tenets of Reactive Software
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5. ReactiveManifesto.org
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6. The Typesafe Reactive Platform
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7. Productivity
Performance
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8. Go Reactive with Typesafe Activator
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9. © 2013 Typesafe Inc.
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10. Play Framework
The High Velocity Web Framework For Java and Scala
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11. © 2013 Typesafe Inc.
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12. © 2013 Typesafe Inc.
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13. © 2013 Typesafe Inc.
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14. Akka
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15. © 2013 Typesafe Inc.
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16. Actors
•Event-driven
•Managed concurrency
•Resilience & supervision
•Scales up & out
•Non-request based lifecycle
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17. Scala
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18. © 2013 Typesafe Inc.
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19. Go Reactive!
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20. Reactive Web / Mobile Apps
•Reactive Request
–Async & Non-Blocking Request & Response
•Reactive Composition
–Reactive Request + Reactive Request + ...
•Reactive Push
–Stream Producer
•2-way Reactive = Bi-Directional Reactive Push
•Reactive UIs
–Interactive, Data Synchronization, Real-time Collaboration
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21. Actors
•event-driven
•managed concurrency
•resilience & supervision
•non-request based lifecycle
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22. Request/Response: Traditional vs. Reactive
def getTweets = Action {
Ok(WS.get("http://twitter.com/"))
}
Client
blocking
Server
blocking
Service
nonblocking
Service
def getTweets = Action { Async {
Ok(WS.get("http://twitter.com/"))
}}
Client
nonblocking
Server
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23. Streaming: Traditional vs. Reactive
// comet style polling
def getNewTweets = Action {
Ok(queuedEvents)
}
Client
blocking
Server
blocking
Service
Server
nonblocking
Service
def streamTweets = Action {
Ok.stream(eventProducer)
}
Client
nonblocking
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24. 2-way Reactive
Producer
Consumer
non-blocking
Consumer
Producer
non-blocking
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25. Tools
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26. Tooling
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27. Testing
•JUnit
•ScalaTest
•Specs2
•Gatling
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28. Build Infrastructure
•sbt, Maven, Gradle
•Jenkins, Bamboo
•TDD, CI, CD
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29. Deployment
•Containerless
•Play
–Stateless
•Canary Deployments
•Rolling Upgrades
•Schema Evolutions
•Akka
–Clustering in 2.2 with Segmented Upgrades
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30. Monitoring
•Typesafe Console
•New Relic
•Takipi
•AppDynamics
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31. Reactive Scales
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32. © 2013 Typesafe Inc.
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33. Go Reactive!
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