aop_interface_class.go

package main

type IDevice interface {
	Fn()
	Sync()
}

type DeviceFn interface {
	Fn()
}

type PC struct{}

func (pc *PC) Fn() {
	println("PC Device fn!!!")
}

type Router struct{}

func (router *Router) Fn() {
	println("Router Device sync")
}

type Device struct {
	DeviceFn
}

func (device *Device) Sync() {
	println("Start Sync ...")
	device.Fn()
	println("Start Done.")
}

func NewDevice(d DeviceFn) IDevice {
	return &Device{
		DeviceFn: d,
	}
}

func StartSync(d IDevice) {
	d.Sync()
}

func main() {
	p := NewDevice(&PC{})
	r := NewDevice(&Router{})
	StartSync(p)
	StartSync(r)
}

output:

Start Sync ...
PC Device fn!!!
Start Done.
Start Sync ...
Router Device sync
Start Done.