Kotlin Coroutines
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Kotlin Coroutines

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About the Book

This is a practical book. It shows everything by examples and focuses on real-life use cases. As this technology is already widely used on Android and backend applications, we will see how we can use it there and what the best practices are.

If you are interested in paperback, you can purchase it here.

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    • Computers and Programming
    • Kotlin
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About the Author

Marcin Moskała
Marcin Moskała

Marcin Moskala is an experienced developer and Kotlin trainer. He is the founder of the Kt. Academy, Kotlin GDE, an official JetBrains partner for teaching Kotlin, and author of the books Effective Kotlin, Kotlin Coroutines, and Android Development with Kotlin.

Marcin Moskała

Episode 254

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About the Contributors

Garima Jain
Garima Jain

a Google Developer Expert in Android from India. She is also known around the community as @ragdroid. Garima works as a Principal Android Engineer at GoDaddy. She is also an international speaker and an active technical blogger. She enjoys interacting with other people from the community and sharing her thoughts with them. In her leisure time, she loves watching television shows, playing TT, and basketball. Due to her love for fiction and coding, she loves to mix technology with fiction and then shares her ideas with others through talks and blog posts.

Igor Wojda
Igor Wojda

a passionate engineer with over a decade of software development experience. He is deeply interested in Android application architecture and the Kotlin language, and he is an active member of the open-source community. Igor is a conference speaker, technical proofreader for the ‘Kotlin In Action’ book, and author of the ‘Android Development with Kotlin’ book. Igor enjoys sharing his passion for coding with other developers.

Ilmir Usmanov
Ilmir Usmanov

a software developer at JetBrains, working on coroutine support in the Kotlin compiler since 2017. Was responsible for stabilization and implementation of the coroutines design. Since then, he has moved to other features, namely inline classes. Currently, his work with coroutines is limited to bug fixing and optimization, since coroutines as a language feature is complete and stable and does not require much attention.

Jana Jarolimov
Jana Jarolimov

an Android developer at Avast. She started her career teaching Java classes at Prague City University, before moving on to mobile development, which inevitably led to Kotlin and her love thereof.

Nicola Corti
Nicola Corti

a Google Developer Expert for Kotlin. He has been working with the language since before version 1.0, and he is the maintainer of several open-source libraries and tools for mobile developers (Detekt, Chucker, AppIntro). He's currently working in the React Native core team at Meta, building one of the most popular cross-platform mobile frameworks. Furthermore, he is an active member of the developer community. His involvement goes from speaking at international conferences to being a member of CFP committees and supporting developer communities across Europe. In his free time, he also loves baking, podcasting, and running.

Richard Schielek
Richard Schielek

an experienced developer and an early adopter of Kotlin and coroutines, using both in production before they became stable. Worked in the European space industry for several years.

Sean McQuillan
Sean McQuillan

a Developer Advocate at Google. With a decade of experience at Twilio and other San Francisco startups, he is an expert at building apps that scale. Sean is passionate about using great tooling to build high-quality apps quickly. When he is not working on Android, you can find him fiddling on the piano or crocheting hats.

Vsevolod Tolstopyatov
Vsevolod Tolstopyatov

a team lead of the Kotlin Libraries team. He works at JetBrains and is interested in API design, concurrency, JVM internals, performance tuning and methodologies.

Table of Contents

  • Introduction
  • Part 1: Understanding Kotlin Coroutines
    • Why Kotlin Coroutines?
    • Sequence builder
    • How does suspension work?
    • Coroutines under the hood
    • Coroutines: built-in support vs library
  • Part 2: Kotlin Coroutines library
    • Coroutine builders
    • Coroutine context
    • Jobs and awaiting children
    • Cancellation
    • Exception handling
    • Coroutine scope functions
    • Dispatchers
    • Constructing a coroutine scope
    • The problem with shared state
    • Testing Kotlin Coroutines
  • Part 3: Channel and Flow
    • Channel
    • Select
    • Hot and cold data sources
    • Flow introduction
    • Understanding Flow
    • Flow building
    • Flow lifecycle functions
    • Flow processing
    • SharedFlow and StateFlow
    • Testing flow
  • Part 4: Kotlin Coroutines in practice
    • Common use cases
    • Recipes
    • Using coroutines from other languages
    • Launching coroutines vs. suspending functions
    • Best practices
  • The End
  • Notes

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