Effective Akka

Effective Akka

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

Author: Jamie Allen

Publisher: "O'Reilly Media, Inc."

ISBN: 9781449360030

Category: Computers

Page: 74

View: 726

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
Categories: Computers

Learning Akka

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 ...

Author: Jason Goodwin

Publisher: Packt Publishing Ltd

ISBN: 9781784393540

Category: Computers

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.
Categories: Computers

Applied Akka Patterns

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.

Author: Michael Nash

Publisher: "O'Reilly Media, Inc."

ISBN: 9781491934838

Category: Computers

Page: 198

View: 424

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
Categories: Computers

Akka Cookbook

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.

Author: Hector Veiga Ortiz

Publisher: Packt Publishing Ltd

ISBN: 9781785288364

Category: Computers

Page: 414

View: 279

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.
Categories: Computers

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

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

Accelerating State Reform : Strengthing Good Governance and Improving Public
Service Delivery ” , Supreme Council ... Royal Government of Cambodia ,
addressed by Samdech Akka Moha Sena Padei Techo HUN SEN , Prime
Minister of ...

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

Publisher:

ISBN: STANFORD:36105133207261

Category: Corruption

Page: 157

View: 734

Categories: Corruption

Akka

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 ...

Author:

Publisher:

ISBN: UCSD:31822034340828

Category: Gender identity in literature

Page: 150

View: 483

Categories: Gender identity in literature

Reactive Design Patterns

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.

Author: Roland Kuhn

Publisher:

ISBN: 1617291803

Category: Computers

Page: 325

View: 175

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.
Categories: Computers

The Master in Akk

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
 ...

Author: Myron Henry Phelps

Publisher: Kalimat Press

ISBN: UOM:39015016885926

Category: Religion

Page: 161

View: 532

Categories: Religion

Report of the Welsh Plant Breeding Station

Report of the Welsh Plant Breeding Station

In 1971 , F , populations were space planted in the field from crosses which have
, on the one hand , parents with highly effective ' major ' genes , e . g . Mla , from
Amsel and Mla , + JMinz from Akka and , on the other hand , high yielding ...

Author: Welsh Plant Breeding Station

Publisher:

ISBN: PSU:000067499342

Category: Horticultural research

Page:

View: 688

Categories: Horticultural research

Report

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 ...

Author: Scottish Plant Breeding Station

Publisher:

ISBN: UCAL:B3343128

Category: Agriculture

Page:

View: 335

Categories: Agriculture

The Kanji Dictionary

The Kanji Dictionary

Author: Mark Spahn

Publisher: Tuttle Publishing

ISBN: 0804820589

Category: Foreign Language Study

Page: 1768

View: 498

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.
Categories: Foreign Language Study

Fast Data Processing Systems with SMACK Stack

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 ...

Author: Raul Estrada

Publisher: Packt Publishing Ltd

ISBN: 9781786468062

Category: Computers

Page: 376

View: 237

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
Categories: Computers

Thomson Bank Directory

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, ...

Author:

Publisher:

ISBN: UCLA:L0089649016

Category: Bankers

Page:

View: 958

Categories: Bankers

Japanese Technical Abstracts

Japanese Technical Abstracts

In order to study the water balance on the Akka Karst Plateau , which consists of
Akka limestone , it was necessary to survey the Aow velocity of the cave water in
the Akka limestone , in which a good many limestone caves are found .

Author:

Publisher:

ISBN: STANFORD:36105024617032

Category: Engineering

Page:

View: 179

Categories: Engineering

Technical Report Laboratory for Insulation Research

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 ...

Author: Massachusetts Institute of Technology. Laboratory for Insulation Research

Publisher:

ISBN: CORNELL:31924069305203

Category: Dielectrics

Page:

View: 266

Categories: Dielectrics

Big Data SMACK

Big Data SMACK

This book covers the five main concepts of data pipeline architecture and how to integrate, replace, and reinforce every layer: The engine: Apache Spark The container: Apache Mesos The model: Akka“li>The storage: Apache Cassandra The ...

Author: Raul Estrada

Publisher: Apress

ISBN: 9781484221754

Category: Computers

Page: 264

View: 481

Learn how to integrate full-stack open source big data architecture and to choose the correct technology—Scala/Spark, Mesos, Akka, Cassandra, and Kafka—in every layer. Big data architecture is becoming a requirement for many different enterprises. So far, however, the focus has largely been on collecting, aggregating, and crunching large data sets in a timely manner. In many cases now, organizations need more than one paradigm to perform efficient analyses. Big Data SMACK explains each of the full-stack technologies and, more importantly, how to best integrate them. It provides detailed coverage of the practical benefits of these technologies and incorporates real-world examples in every situation. This book focuses on the problems and scenarios solved by the architecture, as well as the solutions provided by every technology. It covers the six main concepts of big data architecture and how integrate, replace, and reinforce every layer: The language: Scala The engine: Spark (SQL, MLib, Streaming, GraphX) The container: Mesos, Docker The view: Akka The storage: Cassandra The message broker: Kafka What You Will Learn: Make big data architecture without using complex Greek letter architectures Build a cheap but effective cluster infrastructure Make queries, reports, and graphs that business demands Manage and exploit unstructured and No-SQL data sources Use tools to monitor the performance of your architecture Integrate all technologies and decide which ones replace and which ones reinforce Who This Book Is For: Developers, data architects, and data scientists looking to integrate the most successful big data open stack architecture and to choose the correct technology in every layer
Categories: Computers

Missionary Herald

Missionary Herald

He has considerable knowledge of United States vice - consul at Akka . of
evangelical truth , but does not seem All have ... a per- would , with God's
blessing , render him sonal interest in the great salvation . an effective preacher
of the gospel .

Author:

Publisher:

ISBN: UCAL:B3079735

Category: Indians of North America

Page:

View: 759

Categories: Indians of North America

The Missionary Herald

The Missionary Herald

He has considerable knowledge of United States vice - consul at Akka . of
evangelical truth , but does not seem All ... a per - would , with God ' s blessing ,
render him sonal interest in the great salvation . an effective preacher of the
gospel .

Author:

Publisher:

ISBN: NYPL:33433068289028

Category: Congregational churches

Page:

View: 708

Vols. for 1828-1934 contain the Proceedings at large of the American Board of Commissioners for Foreign Missions.
Categories: Congregational churches

THE SOURCE

THE SOURCE

You forget , ” 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 ...

Author: JAMES A. MICHENER

Publisher:

ISBN:

Category:

Page:

View: 544

Categories:

Annual Report on Research and Technical Work of the Department of Agriculture for Northern Ireland

Annual Report on Research and Technical Work of the Department of Agriculture for Northern Ireland

The results showed that all the spray treatments caused a reduction in the
incidence of mildew , the most effective being the ... ( BMR2 + 4 ) while the least
affected were Wing ( BMR6 ) , Mazurka ( BMR2 + 6 ) , Tyra ( BMR7 ) and Akka (
BMR8 ) .

Author: Great Britain. Department of Agriculture for Northern Ireland

Publisher:

ISBN: UCAL:B4268008

Category: Agriculture

Page:

View: 158

Categories: Agriculture