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Kotlin Design Patterns and Best Practices

You're reading from   Kotlin Design Patterns and Best Practices Elevate your Kotlin skills with classical and modern design patterns, coroutines, and microservices

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Product type Paperback
Published in Apr 2024
Publisher Packt
ISBN-13 9781805127765
Length 474 pages
Edition 3rd Edition
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Author (1):
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Alexey Soshin Alexey Soshin
Author Profile Icon Alexey Soshin
Alexey Soshin
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Table of Contents (19) Chapters Close

Preface 1. Section 1: Classical Patterns
2. Getting Started with Kotlin FREE CHAPTER 3. Working with Creational Patterns 4. Understanding Structural Patterns 5. Getting Familiar with Behavioral Patterns 6. Section 2: Reactive and Concurrent Patterns
7. Introducing Functional Programming 8. Threads and Coroutines 9. Controlling the Data Flow 10. Designing for Concurrency 11. Section 3: Practical Application of Design Patterns
12. Idioms and Anti-Patterns 13. Practical Functional Programming with Arrow 14. Concurrent Microservices with Ktor 15. Reactive Microservices with Vert.x 16. Assessments
17. Other Book You May Enjoy
18. Index

Routing requests

Notice that no matter which URL we specify, we always get the same result. Of course, that’s not what we want to achieve. Let’s start by adding the most basic endpoint, which will only tell us that the service is up and running:

fun main() {
    val vertx = Vertx.vertx()
    vertx.createHttpServer().requestHandler{ ctx ->
        ctx.response().end("OK")
    }.listen(8081)
    println("open http://localhost:8081")
}

This code is designed to produce the same response for any type of request, whether it’s a GET or POST, and irrespective of the URL. Typically, this isn’t the desired behavior. In REST architecture, it’s common practice to define distinct paths for various actions. To facilitate this, we’ll employ the Router. The Router enables the definition of specific handlers for different HTTP methods and URLs.

Now, let’s add a /status endpoint that will return an HTTP status code...

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