Initial CPONE middleware implementation

cmd/server/main.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	_ "github.com/go-sql-driver/mysql"
+
+	"primaya-api/cpone-middleware/internal/config"
+	apphttp "primaya-api/cpone-middleware/internal/http"
+	"primaya-api/cpone-middleware/internal/repository"
+)
+
+func main() {
+	cfg, err := config.Load(".env")
+	if err != nil {
+		log.Fatalf("load config: %v", err)
+	}
+
+	db, err := sql.Open("mysql", cfg.MySQLDSN())
+	if err != nil {
+		log.Fatalf("open mysql: %v", err)
+	}
+	defer db.Close()
+
+	db.SetMaxOpenConns(cfg.DBMaxOpenConns)
+	db.SetMaxIdleConns(cfg.DBMaxIdleConns)
+	db.SetConnMaxLifetime(cfg.DBConnMaxLifetime)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	if err := db.PingContext(ctx); err != nil {
+		log.Fatalf("ping mysql: %v", err)
+	}
+
+	repo := repository.NewMySQLLayananRepository(db)
+	handler := apphttp.NewHandler(repo)
+
+	mux := http.NewServeMux()
+	mux.Handle("GET /api/cpone/layanan-mapping-harga", apphttp.BearerAuth(cfg.BearerToken, http.HandlerFunc(handler.MappingHarga)))
+	mux.HandleFunc("GET /healthz", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte(`{"success":true,"message":"ok","data":null}`))
+	})
+
+	server := &http.Server{
+		Addr:              cfg.Addr(),
+		Handler:           mux,
+		ReadHeaderTimeout: 10 * time.Second,
+	}
+
+	go func() {
+		log.Printf("cpone middleware listening on %s", cfg.Addr())
+		if err := server.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			log.Fatalf("listen: %v", err)
+		}
+	}()
+
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
+	<-stop
+
+	shutdownCtx, shutdownCancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer shutdownCancel()
+	if err := server.Shutdown(shutdownCtx); err != nil {
+		log.Fatalf("shutdown: %v", err)
+	}
+}