Book Image

Akka Cookbook

By : Vivek Mishra, Héctor Veiga Ortiz
Book Image

Akka Cookbook

By: Vivek Mishra, Héctor Veiga Ortiz

Overview of this book

Akka is an open source toolkit that simplifies the construction of distributed and concurrent applications on the JVM. This book will teach you how to develop reactive applications in Scala using the Akka framework. This book will show you how to build concurrent, scalable, and reactive applications in Akka. You will see how to create high performance applications, extend applications, build microservices with Lagom, and more. We will explore Akka's actor model and show you how to incorporate concurrency into your applications. The book puts a special emphasis on performance improvement and how to make an application available for users. We also make a special mention of message routing and construction. By the end of this book, you will be able to create a high-performing Scala application using the Akka framework.
Table of Contents (18 chapters)
Title Page
About the Authors
About the Reviewer
Customer Feedback

Creating a chat-based application using remote actors

A good example of using remote actors is a server-client system. In this recipe, we are going to develop a small chat application where clients will be connected to a remote server that will forward messages to the connected clients.

Getting ready

All the prerequisites are the same as before. We will reuse the previous application.conf and also create new actors, a server actor class, a client actor class, and a client interface actor class to handle the input from the command line.

How to do it...

  1. To begin with, create a file named ChatServer.scala with the following contents:
        package com.packt.chapter7
        import{Actor, ActorRef, Props, Terminated}

        object ChatServer {
          case object Connect
          case object Disconnect
          case object Disconnected
          case class Message(author: ActorRef, body: String,
          creationTimestamp : Long = System.currentTimeMillis())
          def props...