Dependencies

blah.go

package main

import (
	"net/http"
	"fmt"
)

type MessageGetter interface {
	GetMessage() string
}

type Server struct {
	aDependency MessageGetter
}

func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	fmt.Fprint(w, s.aDependency.GetMessage())
}

type HardcodedDependency struct {}

func (h *HardcodedDependency) GetMessage() string {
	return "Dependency injection is often overdone"
}

func main()  {
	myDependency := &HardcodedDependency{}
	myServer := Server{aDependency:myDependency}

	http.ListenAndServe(":5000", &myServer)
}