if err != nil {
		// This will not be a connection error, but a DSN parse error or
		// another initialization error.
		log.Fatal("unable to use data source name", err)
	}
	defer pool.Close()

	pool.SetConnMaxLifetime(0)
	pool.SetMaxIdleConns(3)
	pool.SetMaxOpenConns(3)

	ctx, stop := context.WithCancel(context.Background())
	defer stop()

	appSignal := make(chan os.Signal, 3)
	signal.Notify(appSignal, os.Interrupt)

	db, err := sql.Open("driver-name", "database=test1")
	if err != nil {
		// This will not be a connection error, but a DSN parse error or
		// another initialization error.
		log.Fatal(err)
	}
	db.SetConnMaxLifetime(0)
	db.SetMaxIdleConns(50)
	db.SetMaxOpenConns(50)

	s := &Service{db: db}

	http.ListenAndServe(":8080", s)
}

type Service struct {
	db *sql.DB
}