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Scala Reactive Programming

You're reading from   Scala Reactive Programming Build scalable, functional reactive microservices with Akka, Play, and Lagom

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Product type Paperback
Published in Feb 2018
Publisher Packt
ISBN-13 9781787288645
Length 552 pages
Edition 1st Edition
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Author (1):
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Rambabu Posa Rambabu Posa
Author Profile Icon Rambabu Posa
Rambabu Posa
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Table of Contents (16) Chapters Close

Preface 1. Getting Started with Reactive and Functional Programming FREE CHAPTER 2. Functional Scala 3. Asynchronous Programming with Scala 4. Building Reactive Applications with Akka 5. Adding Reactiveness with RxScala 6. Extending Applications with Play 7. Working with Reactive Streams 8. Integrating Akka Streams to Play Application 9. Reactive Microservices with Lagom 10. Testing Reactive Microservices 11. Managing Microservices in ConductR 12. Reactive Design Patterns and Best Practices 13. Scala Plugin for IntelliJ IDEA 14. Installing Robomongo 15. Other Books You May Enjoy

Message Flow Patterns

As we have discussed, Reactive Systems comprise a set of components. Each component may be a Reactive Microservice. A Reactive System may also depend on some external components (such as data store, REST API, filesystem, server, and so on). We need some common mechanism to communicate between the components to fulfill those components' jobs.

As per the Reactive Manifesto, the following are the four Reactive Design principles or characteristics of a Reactive System:

  • Message-Driven
  • Elasticity
  • Resilience
  • Responsiveness

Take a look at the following Reactive Design Principles diagram:

We can observe from the diagram that Message - Driven is the base principle for a Reactive System. This means that the Message is a basic building block or element to communicate with Reactive System components.

Yes, Messaging is a common technique in a Reactive System to...

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