Effective Akka

With this concise guide, author Jamie Allen provides a collection of best practices based on several years of using the actor model.

Effective Akka

Author: Jamie Allen

Publisher: "O'Reilly Media, Inc."

ISBN: 1449360033

Page: 74

View: 929

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

Learning Akka

The term extra is a term attributed to Jamie Allen in his book Effective Akka from
O'Reilly publications where he demonstrates a similar pattern which he refers to
as the Extra Pattern. After creating the extraActor, the receive block continues to ...

Learning Akka

Author: Jason Goodwin

Publisher: Packt Publishing Ltd

ISBN: 1784393541

Page: 274

View: 979

Build fault tolerant concurrent and distributed applications with Akka About This Book Build networked applications that self-heal Scale out your applications to handle more traffic faster An easy-to-follow guide with a number of examples to ensure you get the best start with Akka Who This Book Is For This book is intended for beginner to intermediate Java or Scala developers who want to build applications to serve the high-scale user demands in computing today. If you need your applications to handle the ever-growing user bases and datasets with high performance demands, then this book is for you. Learning Akka will let you do more for your users with less code and less complexity, by building and scaling your networked applications with ease. What You Will Learn Use Akka to overcome the challenges of concurrent programming Resolve the issues faced in distributed computing with the help of Akka Scale applications to serve a high number of concurrent users Make your system fault-tolerant with self-healing applications Provide a timely response to users with easy concurrency Reduce hardware costs by building more efficient multi-user applications Maximise network efficiency by scaling it In Detail Software today has to work with more data, more users, more cores, and more servers than ever. Akka is a distributed computing toolkit that enables developers to build correct concurrent and distributed applications using Java and Scala with ease, applications that scale across servers and respond to failure by self-healing. As well as simplifying development, Akka enables multiple concurrency development patterns with particular support and architecture derived from Erlang's concept of actors (lightweight concurrent entities). Akka is written in Scala, which has become the programming language of choice for development on the Akka platform. Learning Akka aims to be a comprehensive walkthrough of Akka. This book will take you on a journey through all the concepts of Akka that you need in order to get started with concurrent and distributed applications and even build your own. Beginning with the concept of Actors, the book will take you through concurrency in Akka. Moving on to networked applications, this book will explain the common pitfalls in these difficult problem areas while teaching you how to use Akka to overcome these problems with ease. The book is an easy to follow example-based guide that will strengthen your basic knowledge of Akka and aid you in applying the same to real-world scenarios. Style and approach An easy-to-follow, example-based guide that will take you through building several networked-applications that work together while you are learning concurrent and distributed computing concepts. Each topic is explained while showing you how to design with Akka and how it is used to overcome common problems in applications. By showing Akka in context to the problems, it will help you understand what the common problems are in distributed applications and how to overcome them.

Applied Akka Patterns

Last modified November 12, 2014. http://c2.com/cgi/wiki?AlanKayOnMessaging.
Allen, Jamie. Effective Akka. Sebastopol: O'Reilly Media, 2013. Avram, Abel, and
Floyd Marinescu. DomainDriven Design Quickly. Lulu.com, 2007. Evans, Eric.

Applied Akka Patterns

Author: Michael Nash

Publisher: "O'Reilly Media, Inc."

ISBN: 1491934832

Page: 198

View: 792

When it comes to big data processing, we can no longer ignore concurrency or try to add it in after the fact. Fortunately, the solution is not a new paradigm of development, but rather an old one. With this hands-on guide, Java and Scala developers will learn how to embrace concurrent and distributed applications with the open source Akka toolkit. You’ll learn how to put the actor model and its associated patterns to immediate and practical use. Throughout the book, you’ll deal with an analogous workforce problem: how to schedule a group of people across a variety of projects while optimizing their time and skillsets. This example will help you understand how Akka uses actors, streams, and other tools to stitch your application together. Model software that reflects the real world with domain-driven design Learn principles and practices for implementing individual actors Unlock the real potential of Akka with patterns for combining multiple actors Understand the consistency tradeoffs in a distributed system Use several Akka methods for isolating and dealing with failures Explore ways to build systems that support availability and scalability Tune your Akka application for performance with JVM tools and dispatchers

Reactive Design Patterns

In this book you'll find 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.

Reactive Design Patterns

Author: Roland Kuhn

Publisher:

ISBN: 9781617291807

Page: 325

View: 938

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.

Akka Cookbook

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.

Akka Cookbook

Author: Hector Veiga Ortiz

Publisher: Packt Publishing Ltd

ISBN: 1785288369

Page: 414

View: 443

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.

Strengthening of Domestic and International Co operation for Effective Investigation and Prosecution of Corruption

Royal Government of Cambodia , addressed by Samdech Akka Moha Sena
Padei Techo HUN SEN , Prime Minister of the Kingdom of Cambodia , on “
Rectangular Strategy : For Growth , Employment , Equity and Efficiency ” Phase II
, First ...

Strengthening of Domestic and International Co operation for Effective Investigation and Prosecution of Corruption

Author: United Nations Asia and Far East Institute for the Prevention of Crime and Treatment of Offenders

Publisher:

ISBN:

Page: 157

View: 106

Akka

Another speaker , actress Lakshmi Krishnamurthy too felt that theatre was an
effective means for empowerment . Playwright , director and teacher at NSD
Tripurari Sharma said that a women's theatre fest like Akka played a crucial role
in ...

Akka

Author:

Publisher:

ISBN:

Page: 150

View: 731

The Source

Tabari reminded the mufti, “I leave for Akka in the morning, and to be effective,
your money should reach the mutasarrif promptly.” The mufti bowed, extended
his hand in friendship, then led the qadi from the room. As soon as they had
parted ...

The Source

Author: James A. Michener

Publisher: Dial Press

ISBN: 0812986245

Page: 1104

View: 772

In his signature style of grand storytelling, James A. Michener transports us back thousands of years to the Holy Land. Through the discoveries of modern archaeologists excavating the site of Tell Makor, Michener vividly re-creates life in an ancient city and traces the profound history of the Jewish people—from the persecution of the early Hebrews, the rise of Christianity, and the Crusades to the founding of Israel and the modern conflict in the Middle East. An epic tale of love, strength, and faith, The Source is a richly written saga that encompasses the history of Western civilization and the great religious and cultural ideas that have shaped our world. BONUS: This edition includes an excerpt from James A. Michener's Hawaii. Praise for The Source “Fascinating . . . stunning . . . [a] wonderful rampage through history . . . Biblical history, as seen through the eyes of a professor who is puzzled, appalled, delighted, enriched and impoverished by the spectacle of a land where all men are archeologists.”—The New York Times “A sweeping [novel] filled with excitement—pagan ritual, the clash of armies, ancient and modern: the evolving drama of man’s faith.”—The Philadelphia Inquirer “Magnificent . . . a superlative piece of writing both in scope and technique . . . one of the great books of this generation.”—San Francisco Call Bulletin

The Master in Akk

And again , that the Bahá ' í Faith has “ a vital and effective power to mould life . ”
These things were a revelation to him , Phelps says . He saw in what he had
witnessed there in Akká “ the potentiality of immense good to other nations of the
 ...

The Master in  Akk

Author: Myron Henry Phelps

Publisher: Kalimat Press

ISBN:

Page: 161

View: 519

Scala for Machine Learning

Akka.io implements a reliable action model originally introduced as part of the
Scala standard library. ... Scala concurrent classes support effective deployment
of an application by leveraging multicore CPU capabilities without the need to
write ...

Scala for Machine Learning

Author: Patrick R. Nicolas

Publisher: Packt Publishing Ltd

ISBN: 178355875X

Page: 520

View: 281

Are you curious about AI? All you need is a good understanding of the Scala programming language, a basic knowledge of statistics, a keen interest in Big Data processing, and this book!

Kanji Handbook

(JLPT All Levels) This Japanese Character Dictionary and Kanji Textbook Uses
an Innovative and Effective System Vee David. 悪化 worsening, deterioration
akka 化け物 beast, monster bakemono 化けの皮 hidding, secret bakenokawa
美化 ...

Kanji Handbook

Author: Vee David

Publisher: Tuttle Publishing

ISBN: 1462910637

Page: 1184

View: 837

This massive 3.6 pound text is the ultimate authoritative book on learning Japanese Kanji. The Kanji Handbook presents an ingenious and tested method to learn the 1,945 kanji characters taught in all Japanese language schools. Through the use of "KanjiHybrids"—a concept invented by the author—learners of Kanji and taught to link the characters mentally with English words to form one integral and indivisible unit. This innovative mnemonic device has been proven to train the learner to retain each kanji in the memory much better than simple repetition of the kanji alone—as well as enabling users to differentiate similar–looking kanji characters. Specific learning strategies also enable users to progress quickly from the beginner to advanced level kanji, with stroke orders shown clearly for each kanji character. Eight different indexes-including the highly useful Flip–it Index—form the last part of this unique handbook. Contains the complete list of all 1,945 kanji characters taught in Japanese schools. Presents a new KanjiHybrids system linking kanji characters with English words to aid memorization. Innovative learning strategies guide learners at all levels from beginner to advanced.

Thomson Bank Directory

The industrial - Limited Bank, Limi - lmed effective April 1, 2002 up mited were
split & reorganized to form the Mizuho Bank, ... £akka THEk Dept MAN C s *NA' :-
City, SWIFT CHAS US 33, Dept MAIN V **dest one, The Sh 5* :* Bank #2 * 5x, ...

Thomson Bank Directory

Author:

Publisher:

ISBN:

Page:

View: 650

Fast Data Processing Systems with SMACK Stack

"SMACK is an open source full stack for big data architecture.

Fast Data Processing Systems with SMACK Stack

Author: Raúl Estrada Aparicio

Publisher:

ISBN:

Page:

View: 169

"SMACK is an open source full stack for big data architecture. It is a combination of Spark, Mesos, Akka, Cassandra, and Kafka. This stack is the newest technique developers have begun to use to tackle critical real-time analytics for big data. This highly practical tutorial will teach you how to integrate these technologies to create a highly efficient data analysis system for fast data processing.We'll start off with an introduction to SMACK and show you when to use it. First you'll get to grips with functional thinking and problem solving using Scala. Next you'll come to understand the Akka architecture. Then you'll get to know how to improve the data structure architecture and optimize resources using Apache Spark. Moving forward, you'll learn how to perform linear scalability in databases with Apache Cassandra. You'll grasp the high throughput distributed messaging systems using Apache Kafka. We'll show you how to build a cheap but effective cluster infrastructure with Apache Mesos. Finally, you will deep dive into the different aspects of SMACK using 2 practical case studies. By the end of the video, you will be able to integrate all the components of the SMACK stack and use them together to achieve highly effective and fast data processing."--Resource description page.

Report

Unfortunately , a natural epidemic of yellow rust prevented effective assessment
in the brown rust nursery . ... A number of selections from the crosses BR 83 (
Maris Mink x Mazurka ) , BH 4 ( Akka x Midas ) , BH 213 ( Akka x Maris Mink ) ,
BH ...

Report

Author: Scottish Plant Breeding Station

Publisher:

ISBN:

Page:

View: 219

Fast Data Processing Systems with SMACK Stack

About This Book This highly practical guide shows you how to use the best of the big data technologies to solve your response-critical problems Learn the art of making cheap-yet-effective big data architecture without using complex Greek ...

Fast Data Processing Systems with SMACK Stack

Author: Raul Estrada

Publisher: Packt Publishing Ltd

ISBN: 1786468069

Page: 376

View: 578

Combine the incredible powers of Spark, Mesos, Akka, Cassandra, and Kafka to build data processing platforms that can take on even the hardest of your data troubles! About This Book This highly practical guide shows you how to use the best of the big data technologies to solve your response-critical problems Learn the art of making cheap-yet-effective big data architecture without using complex Greek-letter architectures Use this easy-to-follow guide to build fast data processing systems for your organization Who This Book Is For If you are a developer, data architect, or a data scientist looking for information on how to integrate the Big Data stack architecture and how to choose the correct technology in every layer, this book is what you are looking for. What You Will Learn Design and implement a fast data Pipeline architecture Think and solve programming challenges in a functional way with Scala Learn to use Akka, the actors model implementation for the JVM Make on memory processing and data analysis with Spark to solve modern business demands Build a powerful and effective cluster infrastructure with Mesos and Docker Manage and consume unstructured and No-SQL data sources with Cassandra Consume and produce messages in a massive way with Kafka In Detail SMACK is an open source full stack for big data architecture. It is a combination of Spark, Mesos, Akka, Cassandra, and Kafka. This stack is the newest technique developers have begun to use to tackle critical real-time analytics for big data. This highly practical guide will teach you how to integrate these technologies to create a highly efficient data analysis system for fast data processing. We'll start off with an introduction to SMACK and show you when to use it. First you'll get to grips with functional thinking and problem solving using Scala. Next you'll come to understand the Akka architecture. Then you'll get to know how to improve the data structure architecture and optimize resources using Apache Spark. Moving forward, you'll learn how to perform linear scalability in databases with Apache Cassandra. You'll grasp the high throughput distributed messaging systems using Apache Kafka. We'll show you how to build a cheap but effective cluster infrastructure with Apache Mesos. Finally, you will deep dive into the different aspect of SMACK using a few case studies. By the end of the book, you will be able to integrate all the components of the SMACK stack and use them together to achieve highly effective and fast data processing. Style and approach With the help of various industry examples, you will learn about the full stack of big data architecture, taking the important aspects in every technology. You will learn how to integrate the technologies to build effective systems rather than getting incomplete information on single technologies. You will learn how various open source technologies can be used to build cheap and fast data processing systems with the help of various industry examples

Technical Report Laboratory for Insulation Research

... + int ( 93 ) AKKA fKAF'K'V ff.OK Okit fK ff ' KK ' The effective matrix element of
the interaction Hamiltonian is given , to different orders , by : int < f | Hintli > ? < f \
H Hintli ) ( fH le > < elHoli ) < f | Hintli ) " = ? Ei - EL < 1 / Hintle > < ! Hintle ' > < l ...

Technical Report   Laboratory for Insulation Research

Author: Massachusetts Institute of Technology. Laboratory for Insulation Research

Publisher:

ISBN:

Page:

View: 554

Big Data Data Mining and Machine Learning

Scala is gaining in popularity and has been used to implement major open
source projects like Akka and Spark. Akka is a toolkit ... Clojure also inherits its
simple syntax, lazy evaluation, and highly effective macro facility from Lisp. The
macro ...

Big Data  Data Mining  and Machine Learning

Author: Jared Dean

Publisher: John Wiley & Sons

ISBN: 1118920708

Page: 288

View: 216

With big data analytics comes big insights into profitability Big data is big business. But having the data and the computational power to process it isn't nearly enough to produce meaningful results. Big Data, Data Mining, and Machine Learning: Value Creation for Business Leaders and Practitioners is a complete resource for technology and marketing executives looking to cut through the hype and produce real results that hit the bottom line. Providing an engaging, thorough overview of the current state of big data analytics and the growing trend toward high performance computing architectures, the book is a detail-driven look into how big data analytics can be leveraged to foster positive change and drive efficiency. With continued exponential growth in data and ever more competitive markets, businesses must adapt quickly to gain every competitive advantage available. Big data analytics can serve as the linchpin for initiatives that drive business, but only if the underlying technology and analysis is fully understood and appreciated by engaged stakeholders. This book provides a view into the topic that executives, managers, and practitioners require, and includes: A complete overview of big data and its notable characteristics Details on high performance computing architectures for analytics, massively parallel processing (MPP), and in-memory databases Comprehensive coverage of data mining, text analytics, and machine learning algorithms A discussion of explanatory and predictive modeling, and how they can be applied to decision-making processes Big Data, Data Mining, and Machine Learning provides technology and marketing executives with the complete resource that has been notably absent from the veritable libraries of published books on the topic. Take control of your organization's big data analytics to produce real results with a resource that is comprehensive in scope and light on hyperbole.

Intelligent Technologies for Web Applications

(SLC).that.promotes.effective. social.presence,.cognitive.presence,.and.teaching.
presence.online.through.state-of-the-art. Web.2.0.technologies. ... Akka†.open.
source.project. In.this.system ... Akka.distributed.framework.model..The.

Intelligent Technologies for Web Applications

Author: Priti Srinivas Sajja

Publisher: CRC Press

ISBN: 1439871620

Page: 367

View: 460

The Internet has become an integral part of human life, yet the web still utilizes mundane interfaces to the physical world, which makes Internet operations somewhat mechanical, tedious, and less human-oriented. Filling a large void in the literature, Intelligent Technologies for Web Applications is one of the first books to focus on providing vital fundamental and advanced guidance in the area of Web intelligence for beginners and researchers. The book covers techniques from diverse areas of research, including: Natural language processing Information extraction, retrieval, and filtering Knowledge representation and management Machine learning Databases Data, web, and text mining Human–computer interaction Semantic web technologies To develop effective and intelligent web applications and services, it is critical to discover useful knowledge through analyzing large amounts of content, hidden content structures, or usage patterns of web data resources. Intended to improve and reinforce problem-solving methods in this area, this book delves into the hybridization of artificial intelligence (AI) and web technologies to help simplify complex Web operations. It introduces readers to the state-of-the art development of web intelligence techniques and teaches how to apply these techniques to develop the next generation of intelligent Web applications. The book lays out presented projects, case studies, and innovative ideas, which readers can explore independently as standalone research projects. This material facilitates experimentation with the book’s content by including fundamental tools, research directions, practice questions, and additional reading.