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Kotlin Design Patterns and Best Practices

You're reading from   Kotlin Design Patterns and Best Practices Build scalable applications using traditional, reactive, and concurrent design patterns in Kotlin

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Product type Paperback
Published in Jan 2022
Publisher Packt
ISBN-13 9781801815727
Length 356 pages
Edition 2nd 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 (17) Chapters Close

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

Introducing coroutines

In addition to the threading model provided by Java, Kotlin also has a coroutines model. Coroutines might be considered lightweight threads, and we'll see what advantages they provide over an existing model of threads shortly.

The first thing you need to know is that coroutines are not part of the language. They are simply another library provided by JetBrains. For that reason, if we want to use them, we need to specify this in our Gradle configuration file; that is, build.gradle.kts:

dependencies { 
    ... 
    implementation("org.jetbrains.kotlinx:kotlinx-      coroutines-core:1.5.1") 
}

Important Note:

By the time you read this book, the latest version of the Coroutines library will be 1.6 or greater.

First, we will compare starting a new thread and a new coroutine.

Starting coroutines

We've already seen how to start a new thread in Kotlin in the...

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