package main

import (
	"fmt"
	"time"

	"gopkg.in/go-playground/pool.v3"
)

func main() {

	p := pool.New()
	defer p.Close()

	user := p.Queue(getUser(13))
	other := p.Queue(getOtherInfo(13))

	user.Wait()
	if err := user.Error(); err != nil {
		// handle error
	}

	// do stuff with user
	username := user.Value().(string)
	fmt.Println(username)

	other.Wait()
	if err := other.Error(); err != nil {
		// handle error
	}

	// do stuff with other
	otherInfo := other.Value().(string)
	fmt.Println(otherInfo)
}

func getUser(id int) pool.WorkFunc {

	return func(wu pool.WorkUnit) (interface{}, error) {

		// simulate waiting for something, like TCP connection to be established
		// or connection from pool grabbed
		time.Sleep(time.Second * 1)

		if wu.IsCancelled() {
			// return values not used
			return nil, nil
		}

		// ready for processing...

		return "Joeybloggs", nil
	}
}

func getOtherInfo(id int) pool.WorkFunc {

	return func(wu pool.WorkUnit) (interface{}, error) {

		// simulate waiting for something, like TCP connection to be established
		// or connection from pool grabbed
		time.Sleep(time.Second * 1)

		if wu.IsCancelled() {
			// return values not used
			return nil, nil
		}

		// ready for processing...

		return "Other Info", nil
	}
}