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Effective Akka, by Jamie Allen
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Avoid common mistakes when building distributed, asynchronous, high-performance software with the Akka toolkit and runtime. With this concise guide, author Jamie Allen provides a collection of best practices based on several years of using the actor model. The book also includes examples of actor application types and two primary patterns of actor usage, the Extra Pattern and Cameo Pattern.
Allen, the Director of Consulting for Typesafe—creator of Akka and the Scala programming language—examines actors with a banking-service use case throughout the book, using examples shown in Akka and Scala. If you have any experience with Akka, this guide is essential.
- Delve into domain-driven and work-distribution actor applications
- Understand why it’s important to have actors do only one job
- Avoid thread blocking by allowing logic to be delegated to a Future
- Model interactions as simply as possible to avoid premature optimization
- Create well-defined interactions, and know exactly what failures can occur
- Learn why you should never treat actors as you would an ordinary class
- Keep track of what goes on in production by monitoring everything
- Tune Akka applications with the Typesafe Console
- Sales Rank: #353605 in eBooks
- Published on: 2013-08-15
- Released on: 2013-08-15
- Format: Kindle eBook
Amazon.com Review
Q&A with Jamie Allen, author of "Effective Akka: Patterns and Best Practices"
Q. Why is this an important book for people to read now
A. The advent of the many-core platform means that developers have more processing resources in the form of "cores" at their disposal than ever before. Traditional programming constructs do not allow developers to leverage these cores. As computers add more and more cores with each new platform released by hardware manufacturers, developers will need to find ways to maximize the utilization of these resources. Akka provides a platform for doing just that, and allowing your application to scale up and out as more resources become available.
Q. What will readers walk away with after reading "Effective Akka?"
A. After reading "Effective Akka," readers should have a firm grasp of the kinds of coding issues they may encounter when developing with actors, regardless of whether they're using Scala/Akka or Erlang. Many of the concepts are relevant to developers who are writing asynchronous code without actors as well. Effective Akka provides guidance with respect to coding style and best practices so that developers are able to avoid common pitfalls.
Q. What's so exciting and important about patterns and best prices?
A. The move to "reactive" solutions. Developers can perform much more work nowadays by using asynchrony-- not wasting threads that spawn blocking operations, instead defining work that can be applied automatically when such work is completed. Many technologies are emerging in this space, such as ReactiveJava, Node.js, Go, Clojure's core.async and Scala's futures, actors and async support. Never before have developers had so many useful tools at their disposal to write applications that are interactive, low-latency, fault tolerant, and scalable. Every language and platform is looking to provide a solution in this space.
Q. Can you give us a few tips when building high-performance software with Akka?
About the Author
Jamie Allen is the Director of Consulting for Typesafe, the company that makes the Scala programming language, the Akka toolkit and Play Framework. Jamie has been building actor-based systems with Scala since 2009. Jamie lives in the San Francisco Bay Area with his wife, Yeon, and three children.
Most helpful customer reviews
12 of 12 people found the following review helpful.
Its an intro booklet.
By Ryan Ripken
This is more of a booklet than a book. Great starter material if you don't have access to the web and you are considering Akka. This book needed additional examples and more material and depth. The writing is clear and concise. The author offers a few tips that really should have been expanded into examples (logging, jmx, metrics). Most of the material feels like a rehash of the Akka documentation. The engraving on the cover is cool.
9 of 10 people found the following review helpful.
Good, but not comprehensive
By Krzysztof Ropiak
This short book, written by Jamie Allen, contains number of advises for Akka developers. I believe that you should be already familiar with Akka framework before reading the book, because the author assumes that you already know how to use at least the basic features of the framework.
First chapter of the book discusses the approaches to designing actor based applications. It's hard not to agree with the author about the presented ideas, but I think it's something that most Akka developers already know.
Effective Akka's second chapter presents two quite small patterns used in real world applications. I liked the first one, but the second one I consider a tip instead of "pattern" - like Jamie called it. Application of the pattern are presented with unit-tested source code, which is definitely a plus.
Third chapter (the last one!) presents general advises when using Akka, but I feel developers should be familiar with them already as these advises are not much different that general programming / designing rules. The only difference is that here Allen show how they are relevant to building actor based application. You will also find here ideas for creating systems with resilience and high-performance.
In conclusion, I'd like to say that the book seems nice to me. On the other hand, as Akka developer, I'd love to read a book that would push me on two levels higher in building actor systems, and this book left me a little bit disappointed in that regard.
7 of 8 people found the following review helpful.
its good, its short, it has its perils and its very advanced
By Tomer Ben David
I found the general concurrency best practices in this book very useful, they are general enough to include not just actor practices but includes them. Example how to avoid code which is dependant on time, why STM is goof but still not a magic bullet solving all your problems, where to beware when using it etc.
Its mentioned in the book its for advanced and that's true. You should already feel very comfort with actors, Scala, multithrrading , futures, high scale programming. If you are then this book clarifies a few items. If not you can also learn from it but it will require effort. Personally I do learn from it I like it. I only wish it would be longer more comprehensive. Bottom line it fills a gap so its a good read. Most books avoid the difficult questions this book tries to answer that's exactly why I like it.
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