cleanup

cmd/cart/pool-server.go

@@ -15,6 +15,19 @@ import (
 	messages "git.tornberg.me/go-cart-actor/pkg/messages"
 	"git.tornberg.me/go-cart-actor/pkg/voucher"
 	"github.com/gogo/protobuf/proto"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+var (
+	grainMutations = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "cart_grain_mutations_total",
+		Help: "The total number of mutations",
+	})
+	grainLookups = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "cart_grain_lookups_total",
+		Help: "The total number of lookups",
+	})
 )
 
 type PoolServer struct {
@@ -54,6 +67,7 @@ func (s *PoolServer) AddSkuToCartHandler(w http.ResponseWriter, r *http.Request,
 	if err != nil {
 		return err
 	}
+	grainMutations.Add(float64(len(data.Mutations)))
 	return s.WriteResult(w, data)
 }
 
@@ -436,6 +450,7 @@ func (s *PoolServer) ProxyHandler(fn func(w http.ResponseWriter, r *http.Request
 	return func(cartId cart.CartId, w http.ResponseWriter, r *http.Request) error {
 		if ownerHost, ok := s.OwnerHost(uint64(cartId)); ok {
 			handled, err := ownerHost.Proxy(uint64(cartId), w, r)
+			grainLookups.Inc()
 			if err == nil && handled {
 				return nil
 			}