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Scala Reactive Programming

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

Product type Paperback

Published in Feb 2018

Publisher Packt

ISBN-13 9781787288645

Length 552 pages

Edition 1st Edition

Languages

Scala

Tools

Akka

Concepts

Microservices

Author (1):

Rambabu Posa

View More author details

Table of Contents (22) Chapters

Title Page

Copyright and Credits

Dedication

Packt Upsell

Contributors

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

1. Other Books You May Enjoy

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Index

Kafka with ZooKeeper

By default, Lagom Framework supports an embedded Kafka server as a message broker in a development environment to exchange information or data between services.

This embedded Kafka server's default port number is 9092. Kafka uses ZooKeeper, which is a distributed coordination service. ZooKeeper server's default port number is 2181.

When we start our Lagom Reactive System or service using the sbt runAll command, it starts both the embedded server's Kafka and Zookeeper. We can find the Lagom's implementation of Kafka and Zookeeper in the lagom-kafka-server_2.11-1.3.10.jar file.

If required, we can configure Kafka externally by updating the build.sbt file. We will explore more about this in our examples:

Cassandra

By default in Lagom framework, microservices that need to persist data use Cassandra as a data store. For developer convenience, Lightbend supplies an embedded Cassandra server in the development environment so that we don't have to worry about installing it. We can...

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Authors (1)

Rambabu Posa

Rambabu Posa

Rambabu Posa has been working as Java developer since 2004 and a Scala developer since mid-2015. He loves Functional Programming in the Test-Driven Development way to develop Reactive microservices. He loves teaching and has been giving online training and writing tutorials on both the Java and Scala ecosystems. He loves developing Reactive systems using Lightbend's Reactive Platform Technology stack like Lagom Framework, ConductR, Scala, Akka Toolkit, Akka Streams, Play Framework, and others.

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