Go 싱글턴

1 개요

Go 싱글톤

package main

import (
	"fmt"
	"sync"
)

var once sync.Once

type single struct {
}

var singleInstance *single

func getInstance() *single {
	if singleInstance == nil {
		once.Do(
			func() {
				fmt.Println("Creating single instance now.")
				singleInstance = &single{}
			})
	} else {
		fmt.Println("Single instance already created.")
	}

	return singleInstance
}

package main

import "time"

func main() {
	for i := 0; i < 9; i++ {
		go getInstance()
	}
	time.Sleep(time.Second)
}

2 같이 보기

• 싱글톤
• Go 디자인패턴