http and common

cmd/cart/main.go

@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
-	"net"
 	"net/http"
 	"net/http/pprof"
 	"os"
@@ -26,6 +25,7 @@ import (
 	"git.k6n.net/mats/platform/catalog"
 	"git.k6n.net/mats/platform/config"
 	"git.k6n.net/mats/platform/event"
+	"git.k6n.net/mats/platform/httpserver"
 	"git.k6n.net/mats/platform/rabbit"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/redis/go-redis/v9"
@@ -524,9 +524,11 @@ func main() {
 	httpAddr := normalizeListenAddr(cartPort)
 	debugAddr := normalizeListenAddr(config.EnvString("CART_DEBUG_PORT", "8081"))
 
+	// Debug mux on separate port (metrics + pprof).
+	go http.ListenAndServe(debugAddr, debugMux)
+
 	srv := &http.Server{
 		Addr:        httpAddr,
-		BaseContext: func(net.Listener) context.Context { return ctx },
 		ReadTimeout: 10 * time.Second,
 		// Close idle keep-alive connections so a load test with many short-lived
 		// clients doesn't pin file handles open indefinitely.
@@ -535,38 +537,15 @@ func main() {
 		Handler:      otelhttp.NewHandler(mux, "/"),
 	}
 
-	defer func() {
-
-		fmt.Println("Shutting down due to signal")
-		otelShutdown(context.Background())
-		diskStorage.Close()
-		pool.Close()
-
-	}()
-
-	srvErr := make(chan error, 1)
-	go func() {
-		srvErr <- srv.ListenAndServe()
-	}()
-
-	// Inventory change consumption used to live here over the bare Redis
-	// `inventory_changed` channel; it is now owned by the cart-inventory
-	// service, which translates quantity changes into inventory.level_changed
-	// bus crossings. The cart reads exact stock synchronously when it needs it.
-	// See docs/inventory-shape.md.
-
 	log.Printf("Server started at %s (debug %s)", httpAddr, debugAddr)
 
-	go http.ListenAndServe(debugAddr, debugMux)
-
-	select {
-	case err = <-srvErr:
-		// Error when starting HTTP server.
-		log.Fatalf("Unable to start server: %v", err)
-	case <-ctx.Done():
-		// Wait for first CTRL+C.
-		// Stop receiving signal notifications as soon as possible.
-		stop()
+	if err := httpserver.RunServerWithShutdown(srv, "cart", 15*time.Second, 5*time.Second,
+		func(context.Context) error { stop(); return nil },
+		func(context.Context) error { otelShutdown(context.Background()); return nil },
+		func(context.Context) error { diskStorage.Close(); return nil },
+		func(context.Context) error { pool.Close(); return nil },
+	); err != nil {
+		log.Fatalf("server: %v", err)
 	}
 
 }