The Adapter Pattern

Learn how to use the Adapter pattern to build an fs-like interface that writes to LevelDB instead.

We'll cover the following

Using LevelUP through the filesystem API

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 us 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’s expected by a given client. Let’s take a look at the illustration below to clarify this idea.

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Overview

The Node.js Platform

The Module System

Callbacks and Events

Asynchronous Control Flow Patterns with Callbacks

Asynchronous Control Flow Patterns with Promises and Async/Await

Coding with Streams

Creational Design Patterns

Structural Design Patterns

Behavioral Design Patterns

Universal JavaScript for Web Applications

Advanced Recipes

Scalability and Architectural Patterns

Messaging and Integration Patterns

Conclusion

The Adapter Pattern