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Kotlin Design Patterns and Best Practices - Third Edition

You're reading from  Kotlin Design Patterns and Best Practices - Third Edition

Product type Book
Published in Apr 2024
Publisher Packt
ISBN-13 9781805127765
Pages 474 pages
Edition 3rd Edition
Languages
Author (1):
Alexey Soshin Alexey Soshin
Profile icon Alexey Soshin

Table of Contents (19) Chapters

Preface Section 1: Classical Patterns
Getting Started with Kotlin Working with Creational Patterns Understanding Structural Patterns Getting Familiar with Behavioral Patterns Section 2: Reactive and Concurrent Patterns
Introducing Functional Programming Threads and Coroutines Controlling the Data Flow Designing for Concurrency Section 3: Practical Application of Design Patterns
Idioms and Anti-Patterns Practical Functional Programming with Arrow Concurrent Microservices with Ktor Reactive Microservices with Vert.x Assessments
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Index

Sidekick

The Sidekick design pattern enables us to delegate some tasks from our primary worker to a secondary worker.

So far, we’ve talked about using select solely as a receiver. However, it’s also possible to use select to send items to another channel. To illustrate, let’s consider an example.

First, we initialize batman as an actor coroutine that can process 10 messages every second:

val batman = actor<String> {
    for (c in channel) {
        println("Batman is dealing with $c")
        delay(100)
    }
}

Next, we introduce robin, another actor coroutine, albeit a slower one, capable of processing just four messages per second:

val robin = actor<String> {
    for (c in channel) {
        println("Robin is dealing with $c")
        delay(250)
    }
}

Here, we have a superhero and his sidekick represented as two actor coroutines. The superhero, being more adept, usually takes less time to handle villains...

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