Golang inject example

inject.go

package main

import (
	"fmt"
	"time"

	"github.com/facebookgo/inject"
)

type EmailSender struct {
	name string
}

func (es EmailSender) sendMail(subject string, to []string, body string) error {
	fmt.Println("...")
	return nil
}

func (es EmailSender) sendMailOrLogError(subject string, to []string, body string) {
	fmt.Println("...")
}

type Test struct {
	EmailSender *EmailSender `inject:""`
}

func main() {
	emailSender := new(EmailSender)
	emailSender.name = "this email sender"
	test := new(Test)

	started := float64(time.Now().UnixNano()) / float64(time.Millisecond)
	err := inject.Populate(emailSender, test)
	finished := float64(time.Now().UnixNano()) / float64(time.Millisecond)
	if err != nil {
		panic(err.Error())
	}

	fmt.Println("time=", finished-started)

	fmt.Println("test=", test)
	fmt.Println("test.emailSender=", test.EmailSender)
}