Book Image

Node.js Design Patterns - Third Edition

By : Mario Casciaro, Luciano Mammino
5 (1)
Book Image

Node.js Design Patterns - Third Edition

5 (1)
By: Mario Casciaro, Luciano Mammino

Overview of this book

In this book, we will show you how to implement a series of best practices and design patterns to help you create efficient and robust Node.js applications with ease. We kick off by exploring the basics of Node.js, analyzing its asynchronous event driven architecture and its fundamental design patterns. We then show you how to build asynchronous control flow patterns with callbacks, promises and async/await. Next, we dive into Node.js streams, unveiling their power and showing you how to use them at their full capacity. Following streams is an analysis of different creational, structural, and behavioral design patterns that take full advantage of JavaScript and Node.js. Lastly, the book dives into more advanced concepts such as Universal JavaScript, scalability and messaging patterns to help you build enterprise-grade distributed applications. Throughout the book, you’ll see Node.js in action with the help of several real-life examples leveraging technologies such as LevelDB, Redis, RabbitMQ, ZeroMQ, and many others. They will be used to demonstrate a pattern or technique, but they will also give you a great introduction to the Node.js ecosystem and its set of solutions.
Table of Contents (16 chapters)
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  • 5.1 Dissecting Promise.all(): Implement your own version of Promise.all() leveraging promises, async/await, or a combination of the two. The function must be functionally equivalent to its original counterpart.
  • 5.2 TaskQueue with promises: Migrate the TaskQueue class internals from promises to async/await where possible. Hint: you won't be able to use async/await everywhere.
  • 5.3 Producer-consumer with promises: Update the TaskQueuePC class internal methods so that they use just promises, removing any use of the async/await syntax. Hint: the infinite loop must become an asynchronous recursion. Beware of the recursive Promise resolution memory leak!
  • 5.4 An asynchronous map(): Implement a parallel asynchronous version of that supports promises and a concurrency limit. The function should not directly leverage the TaskQueue or TaskQueuePC classes we presented in this chapter, but it can use the underlying patterns. The function...