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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The Adapter pattern allows us to access the functionality of an object using a different interface.

A real-life example of an adapter would be a device that allows you to plug a USB Type-A cable into a USB Type-C port. In a generic sense, an adapter converts an object with a given interface so that it can be used in a context where a different interface is expected.

In software, the Adapter pattern is used to take the interface of an object (the adaptee) and make it compatible with another interface that is expected by a given client. Let's have a look at Figure 8.3 to clarify this idea:

Figure 8.3: Adapter pattern schematic

In Figure 8.3, we can see how the adapter is essentially a wrapper for the adaptee, exposing a different interface. The diagram also highlights the fact that the operations of the adapter can also be a composition of one or more method invocations on the adaptee. From an implementation perspective, the most common technique is...