How to turn off Ticker in golang

Golang provides the Ticker type to execute a certain function regularly, but in some cases it may be necessary to manually close a Ticker. This article will introduce how to turn off Ticker in golang.

1. Basic usage of Ticker

Before introducing how to close Ticker, let’s first understand its basic usage.

The Ticker type is a structure in golang. A Ticker instance is created through the NewTicker method. For example, the following code creates a Ticker with a 1-second interval:

ticker := time.NewTicker(1 * time.Second)

After the Ticker is created, we can obtain the timer trigger event through the C channel provided by the Ticker. The following code shows how to use Ticker:

for {
    select {
    case <-ticker.C:
        // 每1秒钟执行的代码
    }
}

2. Close Ticker

Since Ticker is executed in an infinite loop in the background, it is necessary to manually close Ticker in some cases . A typical situation is that all tickers need to be closed when the application exits.

Ticker provides a Stop method to close the Ticker. After calling the Stop method, the Ticker trigger event will be stopped, but the Ticker instance will not be released. Therefore, if you need to re-enable Ticker, you can create a new instance through the NewTicker method.

The following code shows how to close the Ticker:

// 创建一个1秒钟间隔的Ticker
ticker := time.NewTicker(1 * time.Second)

// 启动一个协程来执行代码
go func() {
    for {
        select {
        case <-ticker.C:
            // 每1秒钟执行的代码
        }
    }
}()

// 停止Ticker
ticker.Stop()

In the above code, we start a coroutine to execute the code, and then call the Stop method when the Ticker needs to be closed.

3. Summary

The Ticker type in golang provides convenient timing execution function. In some cases, we need to manually close the Ticker. In this case, we can call the Stop method to stop the Ticker triggering event. It should be noted that calling the Stop method will only stop the Ticker triggering event, but will not release the Ticker instance.

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