systems/usermanager/daemon/main.go

package main

import (
	"log"
	"net"
	"os"
	"strings"

	gamelangpb "git.alfi.li/gamelang/protobuf/gamelang"
	um "git.alfi.li/gamelang/systems/usermanager"
	"google.golang.org/grpc"
	gcfg "gopkg.in/gcfg.v1"
)

type Config struct {
	Grpc struct {
		Listen string // ip:port
	}
	Kafka struct {
		Enabled bool
		Broker  string
	}
}

func main() {
	var config Config
	err := gcfg.ReadFileInto(&config, "config")
	if err != nil {
		log.Print(err)
		log.Print("reading config from env")
		config.Grpc.Listen = os.Getenv("GRPC_LISTEN")
		config.Kafka.Enabled = os.Getenv("KAFKA_ENABLED") == "true"
		config.Kafka.Broker = os.Getenv("KAFKA_BROKER")
	}
	log.Print("config read")
	log.Printf("%+v", config)

	// init usermanager
	brokers := []string{}
	if config.Kafka.Enabled {
		brokers = strings.Split(config.Kafka.Broker, ",")
	}
	usermanager := um.NewUserManager(brokers)
	log.Print("usermanager initialized")

	// init GrpcServer
	lis, err := net.Listen("tcp", config.Grpc.Listen)
	if err != nil {
		log.Fatalf("failed to listen: %v", err)
	}
	grpcServer := grpc.NewServer()
	gamelangpb.RegisterUserServiceServer(grpcServer, um.NewUserServer(usermanager))
	grpcServer.Serve(lis)

}