Advanced Concurrency with Context Cancellation

Snippet

Advanced Concurrency with Context Cancellation

Context propagation is the idiomatic way to handle timeouts and cancellations across API boundaries and goroutines, preventing resource leaks in complex async workflows.

snippet.go
go
func worker(ctx context.Context, results chan<- int) {
	for {
		select {
		case <-ctx.Done():
			return
		default:
			// Perform heavy computation
			results <- 42
		}
	}
}

Breakdown

case <-ctx.Done():

Triggered when the parent context is cancelled or times out.

select { ... }

Allows non-blocking checks of the cancellation state while performing work.

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Advanced Concurrency with Context Cancellation

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