Reactive Programming for .NET Developers

Antonio Esposito, Michael Ciceri

• Publisher: Packt Publishing
• Year: 2016
• ISBN:
  9781785882883
• Edition: 1
• Topic: Informatique
• Subtopic: Langues de programmation

Get up and running with reactive programming paradigms to build fast, concurrent, and powerful applications

About This Book

• Get to grips with the core design principles of reactive programming
• Learn about Reactive Extensions for.NET through real-world examples
• Improve your problem-solving ability by applying functional programming

Who This Book Is For

If you are a.NET developer who wants to implement all the reactive programming paradigm techniques to create better and more efficient code, then this is the book for you. No prior knowledge of reactive programming is expected.

What You Will Learn

• Create, manipulate, and aggregate sequences in a functional-way
• Query observable data streams using standard LINQ query operators
• Program reactive observers and observable collections with C#
• Write concurrent programs with ease, scheduling actions on various workers
• Debug, analyze, and instrument Rx functions
• Integrate Rx with CLR events and custom scheduling
• Learn Functional Reactive Programming with F#

In Detail

Reactive programming is an innovative programming paradigm focused on time-based problem solving. It makes your programs better-performing, easier to scale, and more reliable.

Want to create fast-running applications to handle complex logics and huge datasets for financial and big-data challenges? Then you have picked up the right book!

Starting with the principles of reactive programming and unveiling the power of the pull-programming world, this book is your one-stop solution to get a deep practical understanding of reactive programming techniques. You will gradually learn all about reactive extensions, programming, testing, and debugging observable sequence, and integrating events from CLR data-at-rest or events. Finally, you will dive into advanced techniques such as manipulating time in data-flow, customizing operators and providers, and exploring functional reactive programming.

By the end of the book, you'll know how to apply reactive programming to solve complex problems and build efficient programs with reactive user interfaces.

Style and approach

This is a concise reference manual for reactive programming with Rx for C# and F# using real-world, practical examples.

Reactive Programming for .NET Developers

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Reactive Programming for .NET Developers

Copyright © 2016 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the authors, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: July 2016

Production reference: 1150716

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham

B3 2PB, UK.

ISBN 978-1-78588-288-3

www.packtpub.com

Credits

Authors Antonio Esposito Michael Ciceri	Copy Editors Akshata Lobo
Reviewer Uladzimir Kazakevich	Project Coordinator Ritika Manoj
Commissioning Editor Amarabha Banerjee	Proofreader Safis Editing
Acquisition Editor Larissa Pinto	Indexer Rekha Nair
Content Development Editor Arun Nadar	Graphics Jason Monteiro
Technical Editor Sachit Bedi	Production Coordinator Aparna Bhagat

About the Authors

Antonio Esposito is a Microsoft Certified Trainer, software architect, father, son, and lover of cooking and eating. He has been addicted to computer programming from age 8, a developer since 2002, and a speaker from 2010. He has moved across Europe in the last fifteen years working as freelance consultant or speaker for companies such as UniCredit Bank, Ferrari F1 Racing Team, Microsoft Italy, IBM, and many others. He actively attends as a speaker at a lot of conferences, such as MCT Summit and WPC Italy. He is already an author for Packt with Learning .NET High Performance Programming in 2014.

To my children Tommaso and Matteo, and my lovely wife Giusy, who supported me during my many and many nights of writing.

Michael Ciceri is a technology consultant in .NET Framework and Microsoft. He is a functional programming, mathematics, technology, psychology, and science enthusiast. He started as an autodidact and passionately became an analyst and software developer in several areas, such as image processing, banking ATM services security, intranet back end, app monetizing. Recently, he has been working on the analysis and development of functions in the core application to solve problems or improve capabilities.

About the Reviewer

Uladzimir Kazakevich has been writing code for as long as he can remember. He is a developer, consultant, and solution architect. With over 15 years of experience in delivering solutions across industry sectors, such as social media, education, e-commerce and finance, he specializes in technologies, such as Microsoft .NET, WebAPI, Windows Communication Foundation, MSSQL, Microsoft Azure, scalable and high-performant infrastructure. He is certified by SEI as Software Architecture Professional and is TOGAF 9-certified.

Uladzimir serves as Head of EPAM Microsoft Competency Center with focus on Solution Architecture. His key focus is to harness, develop, and scale innovative technologies and engineering methodologies in the company, competency center and successfully apply them in client engagements.

When he codes for fun, he spends his time using Arduinos, sensors, Raspberry Pis, and Azure Machine Learning to build own house automation system. He is also the organizer of local TechTalks and SETCON conferences; he is also an active speaker at such events.

Uladzimir lives in Brest, Belarus, with his wonderful wife Alena and their awesome little girl Nika.

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Preface

Reactive programming is the programming paradigm for handling continuous changing messages and their notifications. Instead of developing static value changes, we develop data changes. This slight difference leaves the developer facing issues regarding high speed messaging systems that handle such messages in a completely new way. Reactive programming means writing functions that transform messages. This means that something, such as an exception within the reactive world became a message. This book will cover Reactive programming with Reactive extensions for .NET in an increasing complex approach. In the final chapters, the reader will find real-world solutions and learn about F# functional reactive programming.

What this book covers

Chapter 1 , First Steps in Reactive Programming, covers what Reactive programming is: the idea, the overall design, the available frameworks, and the languages supporting this incredible programming paradigm.

Chapter 2 , Reactive Programming with C#, will show Reactive programming in action in plain C# coding without the need for any external reference. In this way, any developer may bring reactive programming knowledge to any existing application.

Chapter 3 , Reactive Extension Programming, explains RX basics, such as the Observable sequence, message consumers (Observer), and the most widely used reactive operators, such as message transforming and message grouping functions.

Chapter 4 , Observable Sequence Programming, will teach you how to produce, consume, and route messages with subjects and learn the Rx operator catalog. You will also see operators that apply message filtering, aggregation, transformation, generation, and time-based operations.

Chapter 5 , Debugging Reactive Extensions, will deal with debugging and tracing observable sequences. It focuses on handling exceptions, routing errors, and not...