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

func main() {

    for i := 0; i < 9; i++ {
        go getInstance()
    }
}

2 같이 보기

• 싱글톤
• Go 디자인패턴