Context.Done
Context.Done is a method that returns a channel closed when a context is canceled or reaches its deadline.
100 Go Mistakes and How to Avoid Them
The Done method returns a channel that is closed when a context's cancellation or deadline signal occurs.
- How it is used
- Makes channel-based functions stop when cancellation or a deadline signals that their work should end.
- How deep it goes
- Explains channel closure, cancellation errors, deadline errors, and select-based protection for blocking sends and receives.
- Examples
- Uses a message-receiving loop plus separate cancellation-aware send and receive operations.
- What you can do after
- Apply it via Go select statements to make channel operations respond to cancellation and deadlines.
Read how 100 Go Mistakes and How to Avoid Them explains Context.Done →
Learn Go with Pocket-Sized Projects
context.Context.Done is a method that returns a channel closed when the context is canceled or reaches its deadline.
- How it is used
- Coordinates response handling with cancellation and deadlines in APIs, database calls, and other timeout-aware operations.
- How deep it goes
- Explains channel closure and select-based handling, then demonstrates child-context timeouts and cancellation testing.
- Examples
- Uses a backend response select, a timed database call, and a mock that waits for ctx.Done().
- What you can do after
- Apply it via Go select statements to stop waiting when a context is canceled or its deadline expires.
Read how Learn Go with Pocket-Sized Projects explains Context.Done →
Related concepts
- WaitGrouppart of · WaitGroup is a synchronization type that counts concurrent operations and allows execution to wait until the counter reaches zero.
- contextpart of · In Go, context.Context is an interface carrying cancellation signals, deadlines, and request-scoped values across function and service boundaries.
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