마이크로서비스 패턴

Go code

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"time"
)

// 서비스 인터페이스
type Service interface {
	Name() string
	Start(ctx context.Context) error
	Health() error
}

// 기본 마이크로서비스 구조
type Microservice struct {
	name   string
	server *http.Server
	mux    *http.ServeMux
}

func NewMicroservice(name string, port int) *Microservice {
	mux := http.NewServeMux()
	ms := &Microservice{
		name: name,
		mux:  mux,
		server: &http.Server{
			Addr:         fmt.Sprintf(":%d", port),
			Handler:      mux,
			ReadTimeout:  5 * time.Second,
			WriteTimeout: 10 * time.Second,
		},
	}

	// 기본 엔드포인트
	mux.HandleFunc("GET /health", func(w http.ResponseWriter, r *http.Request) {
		json.NewEncoder(w).Encode(map[string]string{
			"service": name, "status": "healthy",
			"time": time.Now().Format(time.RFC3339),
		})
	})
	mux.HandleFunc("GET /info", func(w http.ResponseWriter, r *http.Request) {
		json.NewEncoder(w).Encode(map[string]string{
			"name": name, "version": "1.0.0",
		})
	})
	return ms
}

func (ms *Microservice) Name() string { return ms.name }
func (ms *Microservice) Health() error { return nil }
func (ms *Microservice) HandleFunc(pattern string, h http.HandlerFunc) {
	ms.mux.HandleFunc(pattern, h)
}

func main() {
	svc := NewMicroservice("user-service", 8080)
	svc.HandleFunc("GET /api/users", func(w http.ResponseWriter, r *http.Request) {
		json.NewEncoder(w).Encode([]map[string]string{{"name": "Gopher"}})
	})
	fmt.Printf("서비스 '%s' 준비 완료\n", svc.Name())
}