40 lines
652 B
Go
40 lines
652 B
Go
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package main
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import (
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"context"
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"errors"
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"fmt"
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"math/rand"
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"time"
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"golang.org/x/sync/errgroup"
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)
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func main() {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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group, groupCtx := errgroup.WithContext(ctx)
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for i := 0; i < 10; i++ {
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group.Go(func() error {
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timeout := time.Second * time.Duration(rand.Intn(10))
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timer := time.NewTimer(timeout)
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defer timer.Stop()
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select {
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case <-timer.C:
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fmt.Println("timeout")
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return errors.New("error")
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case <-groupCtx.Done():
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fmt.Println("canceled")
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return nil
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}
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})
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}
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if err := group.Wait(); err != nil {
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fmt.Println(err.Error())
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}
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}
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