all the refactor

cmd/checkout/main.go

@@ -12,17 +12,17 @@ import (
 
 	"git.k6n.net/mats/go-cart-actor/internal/ucp"
 	"git.k6n.net/mats/go-cart-actor/pkg/actor"
-	"git.k6n.net/mats/go-cart-actor/pkg/cart"
 	"git.k6n.net/mats/go-cart-actor/pkg/checkout"
 	"git.k6n.net/mats/go-cart-actor/pkg/proxy"
 	"git.k6n.net/mats/go-cart-actor/pkg/telemetry"
 	"git.k6n.net/mats/go-redis-inventory/pkg/inventory"
 	"git.k6n.net/mats/platform/config"
+	"git.k6n.net/mats/platform/rabbit"
+	"git.k6n.net/mats/platform/tax"
 	"github.com/adyen/adyen-go-api-library/v21/src/adyen"
 	"github.com/adyen/adyen-go-api-library/v21/src/common"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
-	amqp "github.com/rabbitmq/amqp091-go"
 	"github.com/redis/go-redis/v9"
 	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 )
@@ -55,14 +55,14 @@ var cartInternalUrl = os.Getenv("CART_INTERNAL_URL") // e.g., http://cart-servic
 // selectTaxProvider picks the tax provider from the environment.
 // Default is NordicTaxProvider with SE as the default country.
 // Set TAX_PROVIDER=static for dev and tests (no country awareness).
-func selectTaxProvider() cart.TaxProvider {
+func selectTaxProvider() tax.Provider {
 	switch os.Getenv("TAX_PROVIDER") {
 	case "static":
-		return cart.NewStaticTaxProvider()
+		return tax.NewStatic()
 	case "nordic":
-		return cart.NewNordicTaxProvider(config.EnvString("TAX_DEFAULT_COUNTRY", "SE"))
+		return tax.NewNordic(config.EnvString("TAX_DEFAULT_COUNTRY", "SE"))
 	default:
-		return cart.NewNordicTaxProvider(config.EnvString("TAX_DEFAULT_COUNTRY", "SE"))
+		return tax.NewNordic(config.EnvString("TAX_DEFAULT_COUNTRY", "SE"))
 	}
 }
 
@@ -171,15 +171,28 @@ func main() {
 	}
 
 	var orderHandler *AmqpOrderHandler
-	conn, err := amqp.Dial(amqpUrl)
+	conn, err := rabbit.Dial(amqpUrl, "cart-checkout")
 	if err != nil {
 		log.Fatalf("failed to connect to RabbitMQ: %v", err)
 	}
-	orderHandler = NewAmqpOrderHandler(conn)
+	orderHandler = NewAmqpOrderHandler(conn.Connection())
 	if err := orderHandler.DefineQueue(); err != nil {
 		log.Fatalf("failed to declare order queue: %v", err)
 	}
 
+	// Reconnecting order queue consumer: re-define queue and re-consume on reconnect.
+	conn.NotifyOnReconnect(func() {
+		if err := orderHandler.DefineQueue(); err != nil {
+			log.Printf("checkout: define queue on reconnect: %v", err)
+		}
+	})
+
+	// Stream applied checkout mutations to the shared mutations exchange
+	// (routing key mutation.checkout) for the backoffice live feed.
+	checkoutFeed := actor.NewAmqpListener(conn.Connection(), "checkout", actor.MutationSummary)
+	checkoutFeed.DefineTopics()
+	pool.AddListener(checkoutFeed)
+
 	syncedServer = NewCheckoutPoolServer(pool, fmt.Sprintf("%s, %s", name, podIp), klarnaClient, cartClient, adyenClient, orderClient, orderHandler)
 	syncedServer.inventoryService = inventoryService
 	syncedServer.reservationService = reservationService