How to Build Microservices with Node.js
Companies like Microsoft, eBay, PayPal, and Uber prefer using microservices on Node JS development ecosystems for building their projects. Lets take a deep dive into microservices by Node.js.
What Is A Microservice?
Microservices, or microservice architecture, is a software system where an application will contain a collection of loosely stacked or independent services. Being a cloud-native architecture, each service comes with its respective technology stack, database, and data management model.
Overall microservices, with their clearly defined purposes, simplifies application management and maintenance for developers.
Why Use Microservices?
The microservice architecture enables a developer to scale up or down components independently. It helps developers seamlessly translate clients’ visions into the code structure. Here are a few benefits of using the microservice architectural model.
A collection of microservices, with a well-defined purpose, constitutes an overall application. These microservices interface with each other, ensuring smoother functionality. Unlike monolithic architecture, it enables developers to scale up or down with the resources for each microservice without impacting the application on the whole.
Ease in maintenance
Microservices architecture simplifies the job, especially for a new developer joining the team. Their supervisor could assign them a job only in the context of the service they are working on, without impacting the underlying code infrastructure.
You can keep on introducing new updates and changes into specific microservices, enhancing the overall performance without impacting the functionality of the system app or web development.
How to Build Microservices with Node.js?
You can use programming languages from Java to Python to build a microservice. However, new-age developers prefer Node.Js for its event-driven architecture and real-time application development. It is fast, comes with pre-existing frameworks, is scalable, and requires minimal maintenance.
Here is a step-by-step guide on creating a microservice with Node.js. When you are building a microservice, the first step would be to understand the business requirement of the services. Your microservice should leverage the business needs, solving a problem or fixing an ongoing issue with the application.
In this guide, you will build a microservice with Node.JS for connecting with external API. The app will take the distance between two zip codes and return the distance in miles.
Start with installing Node.Js. Now in the terminal, create a directory. You can name it as microservice. Open the newly formed microservice directory. Now, import the necessary dependency packages with npm. While Express.js handles the backend operations for Node, Request.js will establish the communication channels with external API.
For installing the packages, run the following command:
Here i stands for install, while –save makes sure the packages are added dependencies within the package.json file.
Step 1. Server Setup
Now, create an entry file, server.js, that will execute when the server resumes operations. Inside the server.js file:
Step 2. Specifying Routes
Create an api_routes folder, and inside create a routes.js file. Add the following code:
This file highlights two endpoints: /about and /distance/:City1/:City2.
The /about endpoint would provide application details. And the /distance endpoint will calculate the distance between two points using an external API.
Step 3. Setting up Controller
A controller object in Node.js converts user intent and returns requests. This controller will serve two functions, about() and getDistance().
Step 4. External API Call
After building controller logics, next job is setting up an external API call to manage the calls to third-party API. You could use free from ZIPCODEAPI.com.
Step 5: Execution
The application is ready to run unless you have missed a bracket or made a typo. If all stands corrected, the controller will represent functions and make the external API calls without a glitch.
Coding is complicated. But at the end of the day, microservices have simplified a developer’s job. If you want to learn more, contact us for an in-depth insight on suitable resources for beginners and experts alike. Join the Nettyfy Technologies for learning more about coding and software development that can help your career further.