Template Method implementation using Go

template_method.go

package main

import "fmt"

type CommonInterface interface {
	Create()
	Destroy()
}

type ConcreteA struct {
}

func (concrete ConcreteA) Create() {
	fmt.Println("[A] Created!")
}

func (concrete ConcreteA) Destroy() {
	fmt.Println("[A] Destroyed!")
}

type ConcreteB struct {}

func (concrete ConcreteB) Create() {
	fmt.Println("[B] Created!")
}

func (concrete ConcreteB) Destroy() {
	fmt.Println("[B] Destroyed!")
}

type Abstract struct {
	Common CommonInterface
}

func (abstract Abstract) Run() {
	fmt.Println("Do something before create")
	abstract.Common.Create()
	fmt.Println("Do something before destroy")
	abstract.Common.Destroy()
	fmt.Printf("Do something to wrap up\n\n")
}


func main() {
	var a = ConcreteA{}
	var c = Abstract{Common: a}
	c.Run()


	var b = ConcreteB{}
	c.Common = b
	c.Run()
}