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Node.js Design Patterns

You're reading from Node.js Design Patterns Design and implement production-grade Node.js applications using proven patterns and techniques

Product type Paperback

Published in Jul 2020

Publisher Packt

ISBN-13 9781839214110

Length 664 pages

Edition 3rd Edition

Languages

JavaScript

Tools

Node.js

Concepts

Design Patterns

Authors (2):

Luciano Mammino

Mario Casciaro

View More author details

Table of Contents (16) Chapters

Preface

1. The Node.js Platform

2. The Module System FREE CHAPTER

3. Callbacks and Events

4. Asynchronous Control Flow Patterns with Callbacks

5. Asynchronous Control Flow Patterns with Promises and Async/Await

6. Coding with Streams

7. Creational Design Patterns

8. Structural Design Patterns

9. Behavioral Design Patterns

10. Universal JavaScript for Web Applications

11. Advanced Recipes

12. Scalability and Architectural Patterns

13. Messaging and Integration Patterns

14. Other Books You May Enjoy

15. Index

The problem with infinite recursive promise resolution chains

At this point in the chapter, you should have a strong understanding of how promises work and how to use them to implement the most common control flow constructs. This is therefore the right time to discuss an advanced topic that every professional Node.js developer should know and understand. This advanced topic is about a memory leak caused by infinite Promise resolution chains. The bug seems to affect the actual Promises/A+ specification, so no compliant implementation is immune.

It is quite common in programming to have tasks that don't have a predefined ending or take as an input a potentially infinite array of data. We can include in this category things like the encoding/decoding of live audio/video streams, the processing of live cryptocurrency market data, and the monitoring of IoT sensors. But we can have much more trivial situations than those, for example, when making heavy use of functional programming...

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Authors (2)

Mario Casciaro

Mario Casciaro

Mario Casciaro is a software engineer and entrepreneur, passionate about technology, science and open source knowledge. Mario graduated with a master's degree in software engineering and started his professional career at IBM where he worked for several years on different enterprise products such as Tivoli Endpoint Manager, Cognos Insight, and SalesConnect. Next, he moved to D4H Technologies, a growing SaaS company, to lead the development of a new bleeding-edge product for managing emergency operations in real time. Currently, Mario is the co-founder and CEO of Sponsorama.com, a platform to help online projects raise funds through corporate sponsorship. Mario is also the author of the first edition of Node.js Design Patterns.

See other products by Mario Casciaro

Luciano Mammino

Luciano Mammino

Luciano Mammino is a software engineer born in 1987, the same year that the Nintendo released Super Mario Bros in Europe, which by chance is his favorite video-game. He started coding at the age of 12 using his father's old Intel 386, provided only with the DOS operating system and the qBasic interpreter. After a master's degree in computer science he developed his programming skills mostly as a web developer working mainly as freelancer for companies and startups all around Italy. After a start-up parenthesis of 3 years as CTO and co-founder of Sbaam.com in Italy and in Ireland, he decided to relocate in Dublin to work as senior PHP engineer at Smartbox. He loves developing open source libraries and working with frameworks such as Symfony and Express. He is convinced that the JavaScript fame is still at the very beginning and that this technology will have a huge impact in the future of most of the web-and mobile-related technologies. For this reason, he spends most of his free time improving his knowledge of JavaScript and playing with Node.js.

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