Provide basic security for your Spring Boot application with Spring Security and Kotlin

When you’re creating your REST API, most of the time you don’t want it to be publically accessible. Moreover, sometimes you’d like to restrict certain paths for users with specific roles (for example administrators).

In this blog post, I’m going to provide very basic Spring Security integration for Spring Boot application written in Kotlin language.

Please note that I’m using the example REST API I provided in the previous article. So if you don’t have your Spring Boot REST API built yet, move through the steps I described there.

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Swagger documentation for your Spring Boot API with Springfox

If you’d like to provide Swagger documentation for your Spring Boot REST API in a nice way, you’re in the right place.

Today I’m going to show you how you can achieve it in an automated way, without using tons of annotations in your controllers.
Springfox is a nice tool that allows you to do it.

In this text, I’ll be using the REST API built previously in this text using Spring Boot and Kotlin language, as an example.

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REST API with Spring Boot and MongoDB using Kotlin

If you think about Kotlin you could probably think about Android and mobile development.
It’s true. When Google announced Kotlin as the preferred language for the Android platform, its overall popularity increased sharply.

According to The State of Developer Ecosystem 2019, the survey made by JetBrains (Kotlin language creators), 62% of Kotlin-based apps were mobile. But 41% of Kotlin projects were related to web back-end development.

Indeed, Kotlin may be a good choice for server-side development. Among other frameworks, Kotlin is one of the officially supported languages of the Spring Framework.

In this text, I’d like to show you how easy it is to create a Spring application using Kotlin. I’m going to implement a simple CRUD REST API with Spring Boot and MongoDB as a database using Kotlin as a language.

So, get started with implementation and try it yourself.

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