Golang 中可以像 Laravel 一样实时更新 Config 变量吗？

package main

import (
    "fmt"
    "os"
    "os/signal"
    "syscall"
    "time"
)

type Config struct {
    AppName string
}

func main() {
    cfg := &Config{"App1"}
    fmt.Printf("PID: %d\n", os.Getpid())
    go func() {
        for {
            time.Sleep(time.Second * 3)
            fmt.Println(cfg.AppName)
        }
    }()
    var ch = make(chan os.Signal)
    signal.Notify(ch, syscall.SIGUSR2)
    for s := range ch {
        if s == syscall.SIGUSR2 {
            cfg.AppName = "App2"
            // todo reload config
        }
    }
}Copy