Effective Akka

Effective Akka

Effective Akka

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

Akka Cookbook

Akka Cookbook

Akka Cookbook

Learn how to use the Akka framework to build effective applications in Scala About This Book Covers a discussion on Lagom—the newest launched Akka framework that is built to create complex microservices easily The recipe approach of the book allows the reader to know important and independent concepts of Scala and Akka in a seamless manner Provides a comprehensive understanding of the Akka actor model and implementing it to create reactive web applications Who This Book Is For If you are a Scala developer who wants to build scalable and concurrent applications, then this book is for you. Basic knowledge of Akka will help you take advantage of this book. What You Will Learn Control an actor using the ContolAware mailbox Test a fault-tolerant application using the Akka test kit Create a parallel application using futures and agents Package and deploy Akka application inside Docker Deploy remote actors programmatically on different nodes Integrate Streams with Akka actors Install Lagom and create a Lagom project In Detail 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. Style and approach This highly practical recipe-based approach will allow you to build scalable, robust, and reactive applications using the Akka framework.

Akka

Akka

Akka


Reactive Design Patterns

Reactive Design Patterns

Reactive Design Patterns

Modern distributed applications must deliver near-realtime performance while simultaneously managing big data and high user loads spread across environments ranging from cloud systems to mobile devices. Unlike traditional enterprise applications which focus on decoupling their internal components by defining programming interfaces, reactive applications go one step further and decouple their components also at runtime. This makes it possible to react effectively and efficiently to failures, varying user demands, and changes in the application's execution environment. The resulting systems are highly concurrent and fault-tolerant, with minimal dependencies among individual system components. Reactive Design Patterns is a clearly-written guide for building message-driven distributed systems that are resilient, responsive, and elastic. It contains patterns for messaging, flow control, resource management, and concurrency, along with practical issues like test-friendly designs. All patterns include concrete examples using Scala and Akka—in some cases, Java, JavaScript, and Erlang. Software engineers and architects will learn patterns that address day-to-day distributed development problems in a fault-tolerant and scalable way. Project leaders and CTOs will gain a deeper understanding of the reactive design philosophy. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications.

The Master in Akk

The Master in  Akk

The Master in Akk


Report

Report

Report


The Kanji Dictionary

The Kanji Dictionary

The Kanji Dictionary

The acknowledged authority on Japanese Kanji, The Kanji Dictionary makes written Japanese more accessible than ever before and is an absolutely vital tool for anyone seeking to learn Japanese at an intermediate or advanced level. This is the only kanji dictionary of its kind to employ a revolutionary multiple–reference compound system. Every kanji compound, a word or phrase made up of two or more characters, is listed under each of its components characters. This unique, time–saving feature makes finding compounds fast and easy. Entries are arranged according to a radical based reference system, similar to that used in most other dictionaries, but it has been simplified to make it easier to learn and use. Also, the comprehensive on/kun readings index and handy radical "overview lists" provide further means to find an entry. The focus of this reference work is kanji compounds, and the more than 47,000 entries in the main text include the most common and most important terms and expressions currently in use. The addition of newly coined terms, particularly those in new technical fields, is another key feature. Features over 47,000 entries with an emphasis on current expressions. Arranged for search from any kanji in a compound. Contains a complete on/kun (Chinese/Japanese) reading index. Includes an easy–to–use radical guide. Provides appendices of counters, historical periods, common Japanese surnames, etc.