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Tutorial Series One: Data Brokering with Node.js

While data brokering can take many forms, it ultimately tries to solve the problem of moving data between different systems — a perfect task for Node.js. This can be done using a thin proxy API, an ETL (Extract, Transform, Load) pipeline, or a message queue. In our first course, we evaluate and write code using all three methods. We’ll also help you choose the right one for your project.

More Data Brokering with Node.js tutorials are coming soon!

What Is Data Brokering?
Often we have data available in one system and we want to work with it in a different system.
Overview: Node's Module System
Modules allow developers to better structure, reuse, and distribute their code.
What Is NPM?
Working with Node.js means we have a flourishing ecosystem of open source software and tools available to us.
What Is package.json?
Node projects keep track of dependencies and metadata in a special file named package.json in the root directory of the project.
Create a package.json File
If you're starting a project from scratch, you'll need to create a package.json file to hold important metadata about your project and record your dependencies.
What Is package-lock.json?
You may have noticed it before, you install a package using npm and suddenly a new file called package-lock.json appears in your project directory.
Install NPM Packages
Installing packages and dependencies is one of the most important tasks we accomplish using the npm Command Line Interface (CLI).
Uninstall Packages from a Project
Removing a dependency from a project is a 2-step process.
What Is Semantic Versioning (SemVer)?
The NPM ecosystem uses Semantic Versioning as the standard for version numbers.
Update a Dependency
It's important to keep your dependencies up-to-date.
What Are NPM Scripts?
An npm script is convenient way to bundle common shell commands for your project.
Restart Applications upon File Changes
We can create a custom npm script to run our project during development.
Read/Write JSON Files with Node.js
When you want to store data between server restarts with Node, JSON files are a simple and convenient choice.
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Jon Church

Our instructor

Meet Jon Church, our resident Node.js subject matter expert at Osio Labs. He writes, researches, codes, and records courses that teach people the infinite possibilities of Node.js. He's also an enthusiastic supporter and contributor to the Node.js project.

In development now

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What Is an ETL (Extract, Transform, Load) Pipeline?
ETL is a process of extracting data from one location, transforming it in some way, and then loading it somewhere else.
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What Are Promises?
Promises make writing asynchronous code easier.
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Wait for Multiple Promises with Promise.all
Promises are about control flow, and often we want to wait for multiple promises to finish and then work with all their results together.
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What Is Async/Await?
Async/Await is a new JavaScript feature that allows us to write asynchronous code that looks like synchronous code.
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Extract Data with API Requests
We will make API calls to our service to extract the data we need.
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What Is the fs (File System) Module?
To read data from a file, we use the built in node module fs which helps us work with the filesystem of the computer running our code.
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What Is a Stream?
Streams are a built in Node language feature that represent an asynchronous flow of data.
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Use Streams to Extract, Transform, and Load CSV Data
Using the different types of streams, we can take a local file and perform ETL steps on it to transform the file into JSON and write it to disk.
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Through community surveys and interviews, we’re learning how to connect our tutorials with what our members want to learn:

How do you use Node.js?

Bar graph showing illustrating that survey respondents are interested in learning about using Node.js for glue code, build tools, SSR, streaming data, and serverless.

How do you learn Node.js?

“When I discover I don’t know enough about something, I consume as much knowledge as I can."

“Node for scripting is a way for us to do simple things in a lot of different places really quickly like setting up new clients or changing subscriptions.”

“Everyday learning is part and parcel with being a developer.“

“My ideal learning resource entails short-form videos with in-line code tidbits - something that won’t go out of date in a month.”

“The best learning is when explanation and practical knowledge go hand in hand.”

“A lot of tutorials tell you what you need to fix, rather than explaining why it fixes it or how you went wrong.”

"I never approach learning open-ended. I have to have a problem I'm trying to solve.”

“I typically learn under duress. Something is breaking and I need to learn how to fix it. After that, I hope I get the chance to practice.”

“Learning how you learn is super important. I like to know the naming system of a framework or technology because then I can talk about it.“

Effective tutorials get you up and running fast

  • In-depth topics and step-by-step learning aimed at real-world problem solving
  • Peer-reviewed content with markers indicating updates
  • Thorough written tutorials with video support for easy navigation and reference
  • Use case examples to quickly find your solution
  • Dedicated help desk

Who can benefit from Hey Node?

  • Intermediate to advanced Node.js users. You might work in an agency or maybe in software development.
  • Front-end JavaScripters who need a better understanding of back-end or application-layer concepts.
  • Self-starting learners who understand that tutorials with both video and written components are the most efficient way to learn and retain information.
  • Developers searching for use case examples to quickly find the solution to a specific problem.

Mind the gap

We understand that there’s a lot of free beginning Node.js tutorials but fewer intermediate and advanced ones, and we aim to fill that gap.

About Osio Labs

At Osio Labs, we’re Open Source Inside and Out. We’re deeply committed to fostering and growing communities through open source contribution—including the Node.js community. Your membership helps us give back to the Node.js community.

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