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GitHub - yaitoo/async: Async is an asynchronous task package for Go
Async is an asynchronous task package for Go. Contribute to yaitoo/async development by creating an account on GitHub.
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GitHub - yaitoo/async: Async is an asynchronous task package for Go

GitHub - yaitoo/async: Async is an asynchronous task package for Go

Async

Async is an async/await like task package for Go

License Tests Go Reference Codecov GitHub Release Go Report Card

Features

  • Wait/WaitAny/WaitN for Task and Action
  • context.Context with timeout, cancel support
  • Works with generic instead of interface{}

Tutorials

see more examples on tasks, actions or go.dev

Install async

  • install latest commit from main branch
go get github.com/yaitoo/async@main
  • install latest release
go get github.com/yaitoo/async@latest

Wait

wait all tasks to completed.

t := async.New[int](func(ctx context.Context) (int, error) {
		return 1, nil
	}, func(ctx context.Context) (int, error) {
		return 2, nil
	})

result, err, taskErrs := t.Wait(context.Background())


fmt.Println(result)  //[1,2] or [2,1]
fmt.Println(err) // nil
fmt.Println(taskErrs) //nil


WaitAny

wait any task to completed

t := async.New[int](func(ctx context.Context) (int, error) {
    time.Sleep(2 * time.Second)
		return 1, nil
	}, func(ctx context.Context) (int, error) {
		return 2, nil
	})

result, err, taskErrs := t.WaitAny(context.Background())

fmt.Println(result)  //2
fmt.Println(err) //nil
fmt.Println(taskErrs) //nil

WaitN

wait N tasks to completed.

t := async.New[int](func(ctx context.Context) (int, error) {
    time.Sleep(2 * time.Second)
		return 1, nil
	}, func(ctx context.Context) (int, error) {
		return 2, nil
	}, func(ctx context.Context) (int, error) {
		return 3, nil
	})

result, err, taskErrs := t.WaitN(context.Background(),2)


fmt.Println(result)  //[2,3] or [3,2]
fmt.Println(err) //nil
fmt.Println(taskErrs) //nil

Timeout

cancel all tasks if it is timeout.

 t := async.New[int](func(ctx context.Context) (int, error) {
		time.Sleep(2 * time.Second)
		return 1, nil
	}, func(ctx context.Context) (int, error) {
		time.Sleep(2 * time.Second)
		return 2, nil
	})

	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
	defer cancel()

	result, err, tasks := t.WaitAny(ctx)
	//result, err, tasks := t.Wait(ctx)

	
	fmt.Println(result) //nil
	fmt.Println(err) // context.DeadlineExceeded
	fmt.Println(taskErrs) //nil

Cancel

manually cancel all tasks.

t := async.New[int](func(ctx context.Context) (int, error) {
    time.Sleep(2 * time.Second)
		return 1, nil
	}, func(ctx context.Context) (int, error) {
     time.Sleep(2 * time.Second)
		return 2, nil
	})

ctx, cancel := context.WithCancel(context.Background())
go func(){
  time.Sleep(1 * time.Second)
  cancel()
}()

//result, err, taskErrs := t.WaitAny(ctx)
 result, err, taskErrs := t.Wait(ctx)


fmt.Println(result)  //nil
fmt.Println(err) // context.Cancelled
fmt.Println(taskErrs) // nil


Contributing

Contributions are welcome! If you're interested in contributing, please feel free to contribute

License

MIT License

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