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

How to introduce logging with actors

Logging is the best way to debug an application for errors and information. In this recipe, we will look at how to introduce logging with actors. There are third-party libraries that provide logging to an application, such as sl4jLogger. In Akka, logging is not tied to a particular API, but we will go with ActorLogging, provided by Akka.

Getting ready

To step through this recipe, we do not require any other API dependencies; just import the Hello-Akka project in the IDE.

How to do it…

  1. Create a file, say, Logging.scala, in the com.packt.chapter5 package.
  2. Add the following import to the file:
        import{Props, ActorSystem, ActorLogging, Actor}
  1. Create an actor, as follows, that uses logging:
        class LoggingActor extends Actor with ActorLogging {
          def receive = {
            case (a: Int, b: Int) => {
    "sum of $a and $b is ${a + b}")
            case msg => log.warning(s"i don't know what are...