pcmt/run.go

package main

import (
	"context"
	"flag"
	"net/http"
	"os"
	"os/signal"
	"time"

	"git.dotya.ml/mirre-mt/pcmt/app"
	"git.dotya.ml/mirre-mt/pcmt/config"
)

var (
	addr       = flag.String("addr", ":3000", "TCP address:port to listen at")
	configFlag = flag.String("config", "config.dhall", "Default path of the config file")
)

func run() error {
	a := &app.App{}

	err := a.Init()
	if err != nil {
		return err
	}

	e := a.E()
	logger := a.Logger()

	a.StartupSettings()

	_, err = config.LoadConfig(*configFlag)
	if err != nil {
		logger.Println("error loading config file", *configFlag)
		return err
	}

	a.SetupRoutes()

	go func() {
		if err = e.Start(*addr); err != nil && err != http.ErrServerClosed {
			logger.Println("shutting down the server")
		}
	}()

	quit := make(chan os.Signal, 1)

	signal.Notify(quit, os.Interrupt)
	<-quit

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer func() {
		logger.Println("Interrupt received, gracefully shutting down the server")
		cancel()
	}()

	if err = e.Shutdown(ctx); err != nil {
		return err
	}

	return nil
}