feat: add serve command with graceful shutdown support

cmd/productapp/command/serve.go

@@ -1,13 +1,16 @@
 package command
 
 import (
-	"fmt"
+	"context"
 	"log"
-	"net/http"
 	"os"
 	"os/signal"
+	"strconv"
 	"syscall"
+	"time"
 
+	"git.gocasts.ir/ebhomengo/niki/productapp"
+	"git.gocasts.ir/ebhomengo/niki/repository/mysql"
 	"github.com/spf13/cobra"
 )
 
@@ -25,27 +28,53 @@ var serveCmd = &cobra.Command{
 func serve() {
 	log.Println("Product Service Starting...")
 
-	// TODO: Initialize database connection
-	// TODO: Initialize service dependencies
-	// TODO: Setup HTTP server with routes
+	cfg := productapp.Config{
+		HTTPServer: productapp.HTTPServerConfig{
+			Port: getEnvInt("HTTP_PORT", 8080),
+		},
+		Database: mysql.Config{
+			Username: getEnv("DB_USERNAME", "root"),
+			Password: getEnv("DB_PASSWORD", ""),
+			Port:     getEnvInt("DB_PORT", 3306),
+			Host:     getEnv("DB_HOST", "localhost"),
+			DBName:   getEnv("DB_NAME", "niki_db"),
+		},
+	}
+
+	if p, err := strconv.Atoi(port); err == nil && p > 0 {
+		cfg.HTTPServer.Port = p
+	}
+
+	app := productapp.Setup(cfg)
 
-	// Setup graceful shutdown
 	go func() {
-		sigCh := make(chan os.Signal, 1)
-		signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
-		<-sigCh
-		log.Println("Shutting down Product Service gracefully...")
-		os.Exit(0)
+		app.Start()
 	}()
 
-	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-		fmt.Fprintf(w, "Product Service OK!")
-	})
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
 
-	log.Printf("Product Service listening on port %s", port)
-	if err := http.ListenAndServe(":"+port, nil); err != nil {
-		log.Fatalf("Failed to start server: %v", err)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	if err := app.Stop(ctx); err != nil {
+		log.Fatalf("Server shutdown error: %v", err)
 	}
+
+	log.Println("Product Service stopped.")
+}
+
+func getEnvInt(key string, defaultValue int) int {
+	val := os.Getenv(key)
+	if val == "" {
+		return defaultValue
+	}
+	n, err := strconv.Atoi(val)
+	if err != nil {
+		return defaultValue
+	}
+	return n
 }
 
 func init() {

productapp/app.go

@@ -1,8 +1,64 @@
 package productapp
 
-import "net/http"
+import (
+	"context"
+	"fmt"
+	"log"
+
+	httpserver "git.gocasts.ir/ebhomengo/niki/delivery/http_server"
+	producthttp "git.gocasts.ir/ebhomengo/niki/productapp/delivery/http"
+	productdb "git.gocasts.ir/ebhomengo/niki/productapp/repository/database"
+	"git.gocasts.ir/ebhomengo/niki/repository/mysql"
+	"github.com/labstack/echo/v4"
+	"github.com/labstack/echo/v4/middleware"
+)
+
+type HTTPServerConfig struct {
+	Port int
+}
+
+type Config struct {
+	HTTPServer HTTPServerConfig
+	Database   mysql.Config
+}
 
 type Application struct {
 	Config     Config
-	HTTPServer *http.Server
+	HTTPServer *producthttp.Server
+	DB         *productdb.DB
+	Echo       *echo.Echo
+}
+
+func Setup(cfg Config) *Application {
+	db := mysql.New(cfg.Database)
+	productDB := productdb.New(db)
+
+	e := echo.New()
+	e.Use(middleware.Recover())
+
+	hsrv := &httpserver.Server{
+		Router: e,
+	}
+
+	srv := producthttp.NewServer(hsrv)
+	srv.RegisterRoutes()
+
+	return &Application{
+		Config:     cfg,
+		HTTPServer: srv,
+		DB:         productDB,
+		Echo:       e,
+	}
+}
+
+func (app *Application) Start() {
+	address := fmt.Sprintf(":%d", app.Config.HTTPServer.Port)
+	log.Printf("Product Service listening on %s", address)
+	if err := app.Echo.Start(address); err != nil {
+		log.Fatalf("Failed to start server: %v", err)
+	}
+}
+
+func (app *Application) Stop(ctx context.Context) error {
+	return app.Echo.Shutdown(ctx)
 }

productapp/config.go

@@ -1,4 +1 @@
 package productapp
-
-type Config struct {
-}

productapp/delivery/http/server.go

@@ -20,4 +20,7 @@ func (s *Server) Serve() {
 
 func (s *Server) Stop() {}
 
-func (s *Server) RegisterRoutes() {}
+func (s *Server) RegisterRoutes() {
+	r := s.HTTPServer.Router
+	r.GET("health-check", s.Handler.HealthCheck)
+}