cheggaaa/go-exit

Small and simple helper for handling exit signals (SIGKILL, SIGTERM, SIGQUIT and Interrupt)

This package provide handling exit signals (SIGKILL, SIGTERM, SIGQUIT and Interrupt)

It's not difficult to write, just dead simple to use)

Installation

go get -u github.com/cheggaaa/go-exit

Simple example

package main

import (
	"fmt"
	
	"github.com/cheggaaa/go-exit"
)

func main() {
	// start app in other goroutine
	go myAppStart()

	// wait stop signal
	sig := exit.Wait()
	fmt.Printf("'%v' recieved\n", sig)

	// and do app exit
	myAppStop()
}

// start your app here
func myAppStart() {
	fmt.Println("my app start")
	fmt.Println("send 'kill pid' or press Ctrl+C for exit")
}

func myAppStop() {
	// Do something for exit 
	fmt.Println("my app stop")
}

Advanced example

package main

import (
	"fmt"
	"os"
	"syscall"
	"time"
	
	"github.com/cheggaaa/go-exit"
)

func main() {
	// we can enable http profiling ("net/http/pprof")
	if e := exit.EnableHTTPProfiling(""); e != nil {
		fmt.Println("Oops can't enable pprof:", e)
	}
	
	// register callbacks (optionally)
	exit.On(myCallback)

	// start app in other goroutine
	go myAppStart()

	// wait stop signal
	sig := exit.Wait()
	fmt.Printf("'%v' recieved\n", sig)

	// we can determine reason for exit
	switch sig.(type) {
	case os.Signal:
		switch sig.(os.Signal) {
		case os.Interrupt:
			fmt.Println("'ctrl+c' or 'kill -2'")
		case syscall.SIGTERM:
			fmt.Println("maybe kill")
		default:
			fmt.Printf("os.Signal: '%v'\n", sig)
		}
	case string:
		fmt.Println("exit.Exit() was called")
	}

	// and do app exit
	myAppStop()
}

func myAppStart() {
	fmt.Println("my app start")
	fmt.Println("send 'kill pid' or press Ctrl+C for exit")
	// wait 30 seconds and do exit
	time.Sleep(time.Second * 30)
	exit.Exit("Work done!")
}

func myCallback() {
	fmt.Println("my callback")
}

func myAppStop() {
	// Do something for exit 
	fmt.Println("my app stop")
}