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Akka Essentials, by Munish K. Gupta
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In Detail
Developers/Architects need to manage the fine balance between the ever increasing load and ever decreasing response latency. Applications need to be designed for Internet scale, which means you need to be skilled in building large distributed, scalable, and concurrent applications. Whether you are building the next Facebook or working for a Fortune 500 organization, you need to be ready to design scalable, concurrent, and fault-tolerant applications. Akka is a toolkit and runtime for building highly concurrent, distributed, and fault-tolerant event-driven applications on the JVM.
"Akka Essentials" will show you the current challenges with Java Scalability and concurrency model and how Akka’s Actor Model can help you design and build applications that are inherently scalable and fault-tolerant. Whether you are building new applications or want to refactor an existing application, you will learn the right techniques to build and scale up in no time.
Approach
This is a step-by-step guide where each chapter will teach you a concept by explaining it with clear and lucid examples– each chapter can be read independently.
Who this book is for
This book is aimed at developers, architects who are building large distributed concurrent and scalable applications using Java/Scala. The book assumes knowledge of Java/JEE concepts but no knowledge of Actor model is assumed.
- Sales Rank: #109524 in eBooks
- Published on: 2012-10-25
- Released on: 2012-10-25
- Format: Kindle eBook
About the Author
Munish K. Gupta
Munish K. Gupta is a Senior Architect working for Wipro Technologies. Based in Bangalore, India, his day-to-day work involves solution architecture for applications with stringent non-functional requirements (NFRs), Application Performance Engineering, and exploring the readiness of cutting-edge, open source technologies for enterprise adoption.
He advises enterprise customers to help them solve performance and scalability issues, and implement innovative differentiating solutions to achieve business and technology goals. He believes that technology is meant to enable the business, and technology by itself is not a means to an end.
He is very passionate about software programming and craftsmanship. He is always looking for patterns in solving problems, writing code, and making optimum use of tools and frameworks. He blogs about technology trends and Application Performance Engineering at http://www.techspot.co.in and about Akka at http://www.akkaessentials.in
Most helpful customer reviews
22 of 23 people found the following review helpful.
many flawed concepts like a plague
By Giovanni Azua
This book has some useful information I agree and this is why I am giving it one star. However, it has many fundamentally flawed concepts and flawed examples which are extremely irritating. How come an author covering an advanced topic in parallel computing does not know the most basic principles of concurrent programming and gets to publish such rubbish? the answer to that is beyond me.
For example the paragraph:
"We have Thread.sleep() because there is no guarantee in which order the messages are processed. The first Thread.sleep() method ensures that all the string sentence messages are processed completely before we send the Result message."
Complete rubbish! using Thread.sleep() as means to synchronize concurrent threads. The list goes on and on.
I approached the book because I was interested in a MapReduce solution with Akka. Indeed this book covers MapReduce but it is completely flawed and the result is non-deterministic from run to run! I have discussed the two main concurrency hazards in stackoverflow (http://stackoverflow.com/questions/17291851/mapreduce-implementation-with-akka).
All in all I really do NOT recommend this book. I have no idea where the reputation of this publisher is going to by publishing this rubbish.
8 of 8 people found the following review helpful.
Better off visiting the Akka website
By dal
The book does not really provide Akka essentials more like mini introduction to Akka. I got the Kindle version and found that the explanation and the code samples also have a lot of errors and incomplete information-- at least the downloaded code samples seemed to rectify it a little bit since it is somewhat different from what was used in the book. I used it briefly for intro but most of the time I found myself visiting the Akka website and related forums to get more information and understand the concepts being discussed more thoroughly. If I have to visit the web sites a lot anyway, might as well do my research there and in the end didn't use the book a lot.
5 of 7 people found the following review helpful.
Good Introduction Book
By Josep Prat
This is a good book for people who want a fast introduction to Akka. It explains, as the title says, the essential features of Akka. If you are looking for advanced topics this is not your book.
The book is well structured and offers a step by step definition of features with some basic examples in both supported languages. As expected, the first chapters cover the basic features of the framework, leaving the more complex for the latter ones.
For every feature or concept explained in the book, the author provides the full code for both Java and Scala. This is remarkable because in some other books only the relevant code is provided. However, he falls in too many repetitions. The same line of code can appear up to 3 times in the same section. Additionally, the quality of the examples don't differ too much from the typical Hello World code, which is ideal for the comprehensiveness of the feature explained, but insufficient for a more advanced user looking for more elaborate examples.
Personally, I missed some real world use cases for each of the features explained in the book, where the effectiveness of Akka could stand out over other alternatives out there.
Good points
- Good book for beginners
- Full samples in both languages (Java and Scala)
- Covers basic and advanced topics
- Covers even the Typesafe Console (which is not part of the opensource stack)
- Good introduction to parallelism and actors
Bad points:
- Examples are very simple
- Remote actors were explained insufficiently
- Too many repetition of the same code
- Missing real world use cases
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