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异步监听多个错误 - Go语言中文网 - Golang中文社区

 2 years ago
source link: https://studygolang.com/articles/35659
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异步监听多个错误

reaperhero · 3天之前 · 548 次点击 · 预计阅读时间 1 分钟 · 大约8小时之前 开始浏览    

异步监听多个错误，等待他们完成并打印两个结果。此外，如果一个函数返回错误，我不想等待另一个函数，只是打印错误

func test(i int) (int, error) {
    if i > 2 {
        return 0, errors.New("test error")
    }
    return i + 5, nil
}

func test2(i int) (int, error) {
    if i > 3 {
        return 0, errors.New("test2 error")
    }
    return i + 7, nil
}

func main() {
    results := make(chan int, 2)
    errors := make(chan error, 2)
    var wg sync.WaitGroup
    wg.Add(1)
    go func() {
        defer wg.Done()
        result, err := test(3)
        if err != nil {
            errors <- err
            return
        }
        results <- result
    }()
    wg.Add(1)
    go func() {
        defer wg.Done()
        result, err := test2(3)
        if err != nil {
            errors <- err
            return
        }
        results <- result
    }()

    go func() {
        wg.Wait()
        close(results)
        close(errors)
    }()
    for err := range errors {
        println(err.Error())
        return

    }
    for res := range results {
        println("--------- ", res, " ------------")
    }
}

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