How to Gracefully Stop a Goroutine Running on a Ticker Channel in Go?

Managing Ticker Stop Behavior in Go

When dealing with channels, it's important to consider the behavior of send and receive operations. In the case of a ticker channel, calling ticker.Stop() will stop the ticker from producing new values, but the channel itself remains open.

Challenge: Hanging Goroutine

The provided code snippet demonstrates a goroutine that ranges over a ticker channel. However, when ticker.Stop() is called, the goroutine remains active indefinitely because the channel is not closed.

Solution: Employing a Second Channel

To gracefully handle this situation, a secondary channel (stop) can be introduced. The goroutine can listen on both the ticker channel and the stop channel in a select statement. When a signal to stop is received on the stop channel, the goroutine can close itself and exit.

The modified code below incorporates this solution:

When ticker.Stop() is now called, a signal is sent on the stop channel, causing the goroutine to gracefully exit, even after the ticker has stopped producing values.

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