Book Image

Scala Reactive Programming

By : Rambabu Posa
Book Image

Scala Reactive Programming

By: Rambabu Posa

Overview of this book

Reactive programming is a scalable, fast way to build applications, and one that helps us write code that is concise, clear, and readable. It can be used for many purposes such as GUIs, robotics, music, and others, and is central to many concurrent systems. This book will be your guide to getting started with Reactive programming in Scala. You will begin with the fundamental concepts of Reactive programming and gradually move on to working with asynchronous data streams. You will then start building an application using Akka Actors and extend it using the Play framework. You will also learn about reactive stream specifications, event sourcing techniques, and different methods to integrate Akka Streams into the Play Framework. This book will also take you one step forward by showing you the advantages of the Lagom framework while working with reactive microservices. You will also learn to scale applications using multi-node clusters and test, secure, and deploy your microservices to the cloud. By the end of the book, you will have gained the knowledge to build robust and distributed systems with Scala and Akka.
Table of Contents (16 chapters)

Observing the WF Reactive System bundles

In the previous section, we created our WF Reactive System components bundles successfully. In this section, we will look at what a bundle is and who creates them and how to configure bundle information.

In Lightbend ConductR, the sbt-conductr SBT plugin provides another SBT plugin, sbt-native-packager, which is useful to create bundles. Bundles are ZIP files that are named by using the following syntax:

[Component Name]-[Version Number]-[Digest value].zip

Here, Component Name means wf-frontend, wf-producer-impl, and wf-consumer-impl.

The Version Number is as usual: 1.0.0, and the Digest value is a secure digest value.

In addition to the semantic name (such as wf-frontend), bundles are identified with a secure digest value, which is derived from their contents. When we change the component source code and re-bundle it, it will create a...