Kotlin Coroutines in Practice
summary
Demonstrates a concrete downloader architecture that uses Kotlin coroutines, showing code that resolves references, fanned-out workers, and result aggregation via channels; uses structured concurrency so thrown exceptions cancel child coroutines and prevent leaks; limits parallelism with a fixed worker pool and backpressure channels; uses a select loop to manage request and response channels and a Job-based lifecycle to tie coroutine scopes to object lifetimes so cleanup and error propagation are deterministic.
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