main.go

package main

import (
	"context"
	"errors"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/MShoaei/stock-core/database"
	"github.com/MShoaei/stock-core/server"
	"github.com/sirupsen/logrus"
)

func main() {
	var logger = logrus.New()

	db, err := database.GetDB()
	if err != nil {
		logger.Fatalf("failed to create DB connection: %v\n", err)
	}

	s := server.New(logger, db)
	port := os.Getenv("PORT")
	if port == "" {
		port = "9090"
	}

	srv := &http.Server{
		Addr:         ":" + port,
		Handler:      s,
		ReadTimeout:  5 * time.Second,
		WriteTimeout: 10 * time.Second,
		IdleTimeout:  120 * time.Second,
	}

	go func() {
		if err := srv.ListenAndServe(); err != nil && errors.Is(err, http.ErrServerClosed) {
			logger.Printf("listen: %s\n", err)
		}
	}()

	// Wait for interrupt signal to gracefully shutdown the server with
	// a timeout of 5 seconds.
	quit := make(chan os.Signal)
	// kill (no param) default send syscall.SIGTERM
	// kill -2 is syscall.SIGINT
	// kill -9 is syscall.SIGKILL but can't be catch, so don't need add it
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit
	logger.Println("Shutting down server...")

	// The context is used to inform the server it has 5 seconds to finish
	// the request it is currently handling
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	if err := srv.Shutdown(ctx); err != nil {
		logger.Fatal("Server forced to shutdown:", err)
	}

	logger.Println("Server exiting")
}