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DESCRIPTION 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. KEY FEATURES Offers best patterns for building reactive applications All patterns include concrete examples Discover best practices Explains theory behind reactive system design principles AUDIENCE Readers should be familiar with a standard programming language like Java, C++ or C# and be comfortable with the basics of distributed systems. Although most of the book's examples use the Scala language, no prior experience with Scala or Akka is required. ABOUT THE TECHNOLOGY The design patterns in this book were collected by the consultants and engineers of Typesafe during thousands of hours spent building enterprise-quality applications using Scala and Akka. Although many reactive patterns can be implemented using standard development tools like Java, others require the capabilities offered by a functional programming language like Scala and an Actor-based concurrency system like 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
Edited by Jamie Allen, Paul Boshears, Vincent W.J. van Gerven Oei, A. Staley Groves, and Nico Jenkins. continent. journal http: //continentcontinent.cc/index.php/continent/index] maps a topology of unstable confluences and ranges across new thinking traversing interstices and alternate directions in culture, theory, politics and art. continent. Year 1 comprises a selection of issues 1.1-1.4 collects a variety of thoughts and tropes from the 2011 issues of continent., ranging from work on Greek poetry to deep brain recordings, from speculative realism to the fragments as a unit of prose, and from queer theory to mass murder. This collection presents the fruits of an intense collaboration throughout the different zones of the Academy. With contributions by Jamie Allen, Alain Badiou, Vincent W.J. van Gerven Oei, A. Staley Groves, Graham Harman, Nikos Karouzos, Evan Lavender-Smith, Renata Lemos-Morais, Feliz Molina, Timothy Morton, Gregory Kirk Murray, Maggie Nelson, Michael O'Rourke, Gilson Schwartz, Ben Segal, Nick Skiadopoulos, Karen Spaceinvaders, Phillip Stearns, John van Houdt, and Ben Woodard.
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