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  • Book Overview & Buying Mastering Akka
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Mastering Akka

Mastering Akka

By : Baxter
3.7 (6)
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Mastering Akka

Mastering Akka

3.7 (6)
By: Baxter

Overview of this book

For a programmer, writing multi-threaded applications is critical as it is important to break large tasks into smaller ones and run them simultaneously. Akka is a distributed computing toolkit that uses the abstraction of the Actor model, enabling developers to build correct, concurrent, and distributed applications using Java and Scala with ease. The book begins with a quick introduction that simplifies concurrent programming with actors. We then proceed to master all aspects of domain-driven design. We’ll teach you how to scale out with Akka Remoting/Clustering. Finally, we introduce Conductr as a means to deploy to and manage microservices across a cluster.
Table of Contents (11 chapters)
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A word on dispatchers in Akka


Throughout some of the previous sections, I've mentioned the dispatcher within Akka. This is an extremely important component within Akka's actor system. In Akka's docs, they refer to it as the engine that makes the actor system tick, which I think is a very apt description. Since this component is so important, I want to touch on what it does a bit and also describe the different types and why you might use them.

Dispatchers and executors

The dispatcher in your actor system is responsible for assigning a thread to an actor instance so that it can do work. When an actor instance has no messages to process, it just sits there idle, not taking up any threads. This is why it's okay to have so many actor instances within your system at once (as long as they are not all trying to do work all the time). They don't take any resources, aside from a small amount of heap memory, unless they are processing a message.

Akka is an event-driven system. Work is only done in response...

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Mastering Akka
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