Customer/cmd/server.go

package main

import (
	"context"
	"github.com/99designs/gqlgen/graphql/handler"
	"github.com/gshopify/service-wrapper/server"
	"gshopper.com/gshopify/customer/graphql"
	"gshopper.com/gshopify/customer/graphql/generated"
	"log"
	"os"
	"os/signal"
	"syscall"
	"time"
)

var (
	signals = make(chan os.Signal, 1)
)

func serve() error {
	opts, err := server.NewDefaultOpts(*fPort, *fTimeout)
	if err != nil {
		return err
	}

	resolver, err := graphql.NewResolver()
	if err != nil {
		return err
	}

	srv := server.NewServer(
		handler.NewDefaultServer(
			generated.NewExecutableSchema(generated.Config{Resolvers: resolver})),
		opts)

	go func() {
		if err := srv.ListenAndServe(); err != nil {
			log.Println(err)
		}
	}()

	signal.Notify(signals, os.Interrupt, syscall.SIGTERM, syscall.SIGINT)
	<-signals

	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
	defer cancel()

	_ = srv.Shutdown(ctx)

	log.Println("shutting down")
	return nil
}