Microservice Architecture

This lesson gives an overview of popular web server operating systems.

We’ll cover the following

  • Microservices
  • API

So far, we know that the back end consists of a server that receives user queries and a database from which the appropriate results are retrieved.

What Is Microservices?

However, maximum present day websites don’t depend upon this fashion of internet web hosting, i.e., the code of all of the functionalities of the complete internet site does not exist on one server. Instead, web sites are hosted on virtual machines (simply think of them as computer systems inside computer systems).

Virtual machines can allow us to have numerous ‘machines’ on one server, every with unique working structures. So, the internet site is hosted on a server within a server, and that server delegates duties to other servers.

In the diagram above, a client connects to one server, and it handles everything and responds.

In the Microservices architecture, however, many virtual machines exist on one physical server, and each has a separate job. For example, one of them may be the ‘interface’ that the user interacts with, and it might connect to another for the database.

According to the Microservices website,

“Microservices – also known as the microservice architecture – is an architectural style that structures an application as a collection of services that are

  • Highly maintainable and testable
  • Loosely coupled
  • Independently deployable
  • Organized around business capabilities.

The microservice architecture enables the continuous delivery/deployment of large, complex applications. It also enables an organization to evolve its technology stack.”

What is not an advantage of using the microservice architecture?
- More servers means the website is definitely faster

What Is an API?

API stands for Application Programming Interface, where the keyword is interface. APIs are the doorways, so to speak, that allow developers to interact with an application.

APIs have been around since the dawn of computing, enabling computers to call repeat functions to decrease application bloat. When we discuss APIs in today’s digital economy, however, we’re typically talking about web APIs that facilitate B2B communication.

Broadly speaking, APIs allow developers internal and external to accomplish one of two things: access an application’s data, or use an application’s functionality. Ultimately, this is how the world’s electronics, applications, and web pages are linked up to communicate with one another and work together.

The Difference Between APIs and Microservices

By this point, you’re somewhat familiar with the concepts of both APIs and microservices. Now, let’s highlight the differences:

Microservices are an architectural style for web applications, where the functionality is divided up across small web services.

whereas

APIs are the frameworks through which developers can interact with a web application.

As we mentioned, there’s definitely an overlap between the two, since so many microservices use APIs to communicate between themselves.

In the next lesson, we will talk about back end programming.

Also Read – What is The Back End?


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