seller id deadlock and delete elapsed time

controllers/ImportController.go

@@ -13,6 +13,7 @@ import (
 	"os"
 	"strconv"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"gorm.io/driver/mysql"
@@ -26,9 +27,25 @@ var (
 	families                     []gm.AttributeFamily
 	sellers                      = make(map[string]gm.MarketplaceSeller)
 	AttributesMap                = make(map[string]gm.Attribute)
+	locker                       = stateUnlocked
+)
+
+const (
+	stateUnlocked uint32 = iota
+	stateLocked
 )
 
 func StartImport(w http.ResponseWriter, route *http.Request) {
+	// lock the request
+	if !atomic.CompareAndSwapUint32(&locker, stateUnlocked, stateLocked) {
+		w.WriteHeader(http.StatusTooManyRequests)
+		json.NewEncoder(w).Encode(map[string]string{
+			"msg": "Scraper or Updater in progress!",
+		})
+
+		return
+	}
+	defer atomic.StoreUint32(&locker, stateUnlocked)
 	start := time.Now()
 
 	r := new(big.Int)