Topic 13. Coroutines: suspend functions, structured concurrency, dispatchers, and asynchronous Flow streams

Goal: learn to launch and cancel coroutines, choose a dispatcher, handle independent failures, and build data streams.

Lecture contents

1. Coroutines and suspend functions — Why a program needs coroutines · Suspend functions and builders
2. Structured concurrency — Structured concurrency · Cooperative cancellation · Errors and supervision
3. Dispatchers and shared state — Context and dispatchers · Shared mutable state
4. Asynchronous Flow streams — A cold Flow · StateFlow and SharedFlow
5. Debugging and tests — Debugging and tests

Practice and review

• Practice — 3 worked examples with complete code
• Tasks — 30 variants, each with tasks at three difficulty levels
• Summary — conclusions and self-check questions