handlerFuncs and handlers

main.go

package main

import "fmt"

func main() {
	y := registrar{}
	y.handlerFuncRegistry = map[string]handlerFunc{
		"TheFuncHandler": implementation,
	}
	z := myHandler{}
	y.handlerRegistry = map[string]handler{
		"TheHandler": z,
	}
	y.invoker("TheFuncHandler", "Marie")
	y.invoker("TheHandler", "Curie")
}

type registrar struct {
	handlerFuncRegistry map[string]handlerFunc
	handlerRegistry     map[string]handler
}

func (r registrar) invoker(x string, data string) {
	if _, ok := r.handlerFuncRegistry[x]; ok {
		r.handlerFuncRegistry[x].implementation(data)
	}
	if _, ok := r.handlerRegistry[x]; ok {
		r.handlerRegistry[x].implementation(data)
	}
}

type handler interface {
	implementation(string)
}
type handlerFunc func(string)

func (m handlerFunc) implementation(a string) {
	m(a)
}
func implementation(a string) {
	fmt.Println("HandlerFunc: Hello", a)
}

type myHandler struct{}

func (m myHandler) implementation(a string) {
	fmt.Println("Handler: Hello", a)
}