A shutdown-hook scaffold for Go

gistfile1.go

package lifecycle

import (
        "log"
        "os"
        "os/signal"
)

var targets []Shutdowner

type Shutdowner interface {
        Shutdown()
}

func init() {
        targets = make([]Shutdowner, 0)
        go func() {
                c := make(chan os.Signal, 1)
                signal.Notify(c, os.Interrupt, os.Kill)
                <-c
                log.Println("Shutdown...")
                for _, sd := range targets {
                        sd.Shutdown()
                }
                os.Exit(0)
        }()
}

func AddShutdownHook(sd Shutdowner) {
        targets = append(targets, sd)
}