main.go

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"
	conf "trypto-server/config"
	ctl "trypto-server/controller"

	"trypto-server/logger"
	"trypto-server/model"
	rt "trypto-server/router"

	"golang.org/x/sync/errgroup"
)

var (
	g errgroup.Group
)

func main() {

	mod, _ := model.NewModel()
	controller, _ := ctl.NewCTL(mod)
	rt, _ := rt.NewRouter(controller)
	config := conf.GetConfig("./config/config.toml")

	if err := logger.InitLogger(config); err != nil {
		fmt.Printf("init logger failed, err:%v\n", err)
		return
	}

	mapi := &http.Server{
		Addr:           config.Server.Port,
		Handler:        rt.Idx(),
		ReadTimeout:    0,
		WriteTimeout:   0,
		MaxHeaderBytes: 1 << 20,
	}

	//고루틴 서버 동작
	g.Go(func() error {
		return mapi.ListenAndServe()
	})

	quit := make(chan os.Signal) //chan 선언
	// 해당 chan 핸들링 선언, SIGINT, SIGTERM에 대한 메세지 notify
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit //메세지 등록

	// 해당 context 타임아웃 설정, 5초후 server stop
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	if err := mapi.Shutdown(ctx); err != nil {
		log.Fatal("Server Shutdown:", err)
	}
	// catching ctx.Done(). timeout of 5 seconds.
	select {
	case <-ctx.Done():
		logger.Info("timeout of 5 seconds.")
	}
	logger.Info("Server exiting")
	//우아한 종료

	if err := g.Wait(); err != nil {
		logger.Error(err)
	}
}