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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

The Throttling Pattern

The Throttling Reactive Pattern is a Reactive System's Flow control pattern. It is also known as the Message Throttler.

Our Reactive System has some external dependencies, such as the REST API. We want to make HTTP requests to that external REST API. The REST API has the following restrictions:

  • It accepts only 10 requests per minute from an endpoint
  • If it receives more than 10 requests in 1 minute, it will block the endpoint requests, or if we want to proceed, we need to pay some money

If we have this kind of restriction in our external components or systems, then it's good to use the Throttler.

A Throttler Design Pattern allows us to implement a component that sends requests to external components based on our configurations.

For instance, if we need a time-based Throttler to send requests to the preceding REST API, then we can configure how...

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