David Gonzalez - Developing Microservices with Node.js
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- Book:Developing Microservices with Node.js
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Learn to develop micro, efficient, and scalable services for server-side programming in Node.js using this hands-on guide
About This Book- Real world example explained chapter after chapter with code examples.
- Useful concepts for other languages like Java or PHP
- Easy to follow by people with little to none experience in Node.js
- Node.js Version 0.12.2 and the latest compatible versions of Seneca and PM2
Node.js developer with basic server-side development knowledge - but no knowledge of implementing microservices in Node.js applications. Also useful for developers in other languages like Java or C#.
What You Will Learn- Identify where the microservice oriented architectures can tackle the most common problems in the software used by the big organisations.
- Re-architecture an existing monolithic system into a microservices oriented software.
- Build robust and scalable microservices using Seneca and Node.js.
- Testing of the microservices in insolation in order to create a solid system.
- Deploy and manage microservices using PM2
- Monitoring the health of a microservice (CPU, memory, I/O) and how the degradation of the performance in one microservice could degrade the performance of full system.
Microservices architecture is a style of software architecture. As the name suggests, microservicess refers to small services. For a large implementation, this means breaking the system into really small, independent services. Alternative to monolithic architecture (where the entire system is considered as a single big, interwoven segment), microservices approach is getting more and more popular with large, complex applications that have a very long lifecycle, which require changes at regular intervals. Microservices approach allows this type of changes with ease as only a part of the system undergoes changes and change control is easy.
An example of such large system can be an online store-includes user interface, managing product catalog, processing orders, managing customers account. In a microservices architecture each of these tasks will be divided and into smaller services. Also, these services will be further broken down into independent services-for user interface, there will be separate services for input, output, search bar management, and so on. Similarly, all other tasks can be divided in very small and simple services.
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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 author, 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: April 2016
Production reference: 1220416
Published by Packt Publishing Ltd.
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Birmingham B3 2PB, UK.
ISBN 978-1-78588-740-6
www.packtpub.com
Author
David Gonzalez
Reviewer
Kishore Kumar Yekkanti
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David Gonzalez is a language-agnostic software engineer working in financial services for a number of years, trying to find solutions for the right level of abstraction and learning how to get the right balance between too concrete and too abstract .
He studied in Spain, but soon moved to the wider and more interesting market of Dublin, where he has been living since 2011. David is currently working as an independent consultant in the FinTech sector. The URL to his Linkedin account is https://ie.linkedin.com/in/david-gonzalez-737b7383.
He loves experimenting with new technologies and paradigms in order to get the broader picture of the complex world of software development.
To my wife, Ester, thanks for your unconditional support in every single aspect of my life.
To my unborn daughter, Elena, may the life give you all the happiness that you are bringing to your parents.
Kishore Kumar Yekkanti is an experienced professional who has worked across various domains and technologies over the past ten years. He is passionate about eliminating the waste during the software development. Kishore is a huge contributor to and follower of agile principles. He is a full-stack developer who wants to build the end-to-end systems, and a polyglot programmer. His current focus is on scaling microservices in highly distributed applications that are deployed using container-based systems (Docker) on cloud. He has worked as the lead/principal engineer for many well-known companies such as Thoughtworks, CurrencyFair, and others, where he lead the teams to attain nirvana through microservices.
For my partner and best friend Jyothsna, and my daughter, Dhruti, who continues to humour me despite of my crazy schedules.
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This book is a hands-on guide to start writing microservices using Node.js and the most modern frameworks, especially Seneca and PM2. In the chapters, we will discuss how to design, build, test, and deploy microservices using the best practices. We will also discuss a valuable lesson: how to make the right level of compromise in order to avoid over-designing and get the business requirements aligned with the technical solutions.
, Microservices Architecture , discusses the pros and cons of microservices-oriented architectures. It will be the foundation for the rest of the book.
, Microservices in Node.js Seneca and PM2 Alternatives , introduces Node.js, Seneca, and PM2. In it, we will discuss the structure of a Node.js application and how to run it using PM2. We will also dive into a few alternatives to Seneca and PM2.
, From the Monolith to Microservices , covers how to tackle the organic growth (unplanned software changes) using microservices. We will also talk about how to split a monolithic application into microservices.
, Writing Your First Microservice in Node.js , explains how to write our first microservice.
, Security and Traceability , covers how security and traceability are two important characteristics of modern systems. We need to keep the information secure and the actions traceable. In this chapter, we will discuss how to do it using Seneca.
, Testing and Documenting Node.js Microservices , introduces using the main frameworks for testing on Node.js: Mocha and Chai. We will also make use of Sinon (another framework) to mock services. Swagger will be our choice for documenting microservices.
, Monitoring Microservices , covers using PM2 to monitor our microservices. We will use it along with Keymetrics to get the maximum benefit of such an advanced tool.
, Deploying Microservices , explains how, using PM2, we are going to learn to deploy microservices in our different environments, managing our ecosystem of applications with a single command and reducing the overhead introduced by the microservices architecture. We will also discuss Docker, one of the most advanced systems to deploy applications not only in Node.js, but also in general applications.
In order to follow the book, we are going to need to install Node.js, PM2 (it is a package that is installed through npm), and MongoDB.
We will also need an editor. Personally, I use Atom, but any general purpose editor should be enough.
This book is for developers that have some experience with Node.js but want to learn about Seneca and microservices. It is 70% practice-oriented (as we will be writing a lot of code), but it also is 30% theory, based on the code created that will help the reader to apply the exposed patterns to new software.
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