Book Image

Kotlin Design Patterns and Best Practices - Second Edition

By : Alexey Soshin
Book Image

Kotlin Design Patterns and Best Practices - Second Edition

By: Alexey Soshin

Overview of this book

This book shows you how easy it can be to implement traditional design patterns in the modern multi-paradigm Kotlin programming language, and takes you through the new patterns and paradigms that have emerged. This second edition is updated to cover the changes introduced from Kotlin 1.2 up to 1.5 and focuses more on the idiomatic usage of coroutines, which have become a stable language feature. You'll begin by learning about the practical aspects of smarter coding in Kotlin, as well as understanding basic Kotlin syntax and the impact of design patterns on your code. The book also provides an in-depth explanation of the classical design patterns, such as Creational, Structural, and Behavioral families, before moving on to functional programming. You'll go through reactive and concurrent patterns, and finally, get to grips with coroutines and structured concurrency to write performant, extensible, and maintainable code. By the end of this Kotlin book, you'll have explored the latest trends in architecture and design patterns for microservices. You’ll also understand the tradeoffs when choosing between different architectures and make informed decisions.
Table of Contents (17 chapters)
1
Section 1: Classical Patterns
6
Section 2: Reactive and Concurrent Patterns
11
Section 3: Practical Application of Design Patterns

Chapter 7: Controlling the Data Flow

The previous chapter covered an important Kotlin concurrency primitive: coroutines. In this chapter, we'll discuss two other vital concurrent primitives in Kotlin: channels and flows. We'll also touch on higher-order functions for collections, as their API is very similar to that of channels and flows.

The idea of making extensive use of small, reusable, and composable functions comes directly from the functional programming paradigm, which we discussed in the previous chapter. These functions allow us to write code in a manner that describes what we want to do instead of how we want to do it.

In this chapter, we'll cover the following topics:

  • Reactive principles
  • Higher-order functions for collections
  • Concurrent data structures
  • Sequences
  • Channels
  • Flows

After reading this chapter, you'll be able to efficiently communicate between different coroutines and process your data with ease.

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