Go Select & Channel Patterns Tutorial — Learn Select & Channel Patterns in Go

Go Tutorial: Select & Channel Patterns

Go deeper into concurrency. Timeouts, tickers, fan-in, fan-out, context, rate limiting, graceful shutdown — the patterns every real Go system uses.

Beyond the basics

You know goroutines and channels. Now learn the patterns that production Go systems are actually built on.

These are not theoretical exercises. Every Go service you will ever build will use at least half of what is in this chapter — timeouts, context cancellation, rate limiting, graceful shutdown.

Twelve steps. Advanced, practical, real.

What you'll learn in this Go select & channel patterns tutorial

This interactive Go tutorial has 5 hands-on exercises. Estimated time: 30 minutes.

Your first select — `select` waits on multiple channels and runs whichever one is ready first. A fiction channel has "Dune" ready. Run this …
select with default — non-blocking — Add a `default` case to make select non-blocking. If no channel has data, default runs immediately. The holds shelf is e…
Timeout — don't wait forever — `time.After(d)` returns a channel that fires after duration `d`. The catalog search takes 200ms but you want to wait max…
Done channel — stop gracefully — A `done` channel signals a goroutine to stop. The librarian processes returns until the library closes. Sleep 100ms, the…
Fan-in — merge two catalog searches — Fan-in merges multiple channels into one. The `merge` function launches forwarding goroutines but they are missing. Add …

Go Select & Channel Patterns concepts covered

Beyond the basics

Go Tutorial: Select & Channel Patterns

Go deeper into concurrency. Timeouts, tickers, fan-in, fan-out, context, rate limiting, graceful shutdown — the patterns every real Go system uses.

Beyond the basics

You know goroutines and channels. Now learn the patterns that production Go systems are actually built on.

These are not theoretical exercises. Every Go service you will ever build will use at least half of what is in this chapter — timeouts, context cancellation, rate limiting, graceful shutdown.

Twelve steps. Advanced, practical, real.

What you'll learn in this Go select & channel patterns tutorial

This interactive Go tutorial has 5 hands-on exercises. Estimated time: 30 minutes.

Your first select — `select` waits on multiple channels and runs whichever one is ready first. A fiction channel has "Dune" ready. Run this …
select with default — non-blocking — Add a `default` case to make select non-blocking. If no channel has data, default runs immediately. The holds shelf is e…
Timeout — don't wait forever — `time.After(d)` returns a channel that fires after duration `d`. The catalog search takes 200ms but you want to wait max…
Done channel — stop gracefully — A `done` channel signals a goroutine to stop. The librarian processes returns until the library closes. Sleep 100ms, the…
Fan-in — merge two catalog searches — Fan-in merges multiple channels into one. The `merge` function launches forwarding goroutines but they are missing. Add …

Go Select & Channel Patterns concepts covered

Beyond the basics