avoid unnecessary disk size calculations

server/handler/vmModifyEvent.go

@@ -129,6 +129,8 @@ func (h *Handler) VmModifyEvent(w http.ResponseWriter, r *http.Request) {
 				(strings.Contains(event.CloudEvent.Data.FullFormattedMessage, ".vmdk") ||
 					strings.Contains(event.CloudEvent.Data.FullFormattedMessage, "capacityInKB")) {
 
+				var diskChangeFound = false
+
 				// TODO - query current disk size from Inventory table and only create an update if the size is now changed
 				if testConfig.DeviceChange != nil {
 					for i := range testConfig.DeviceChange {
@@ -146,9 +148,10 @@ func (h *Handler) VmModifyEvent(w http.ResponseWriter, r *http.Request) {
 								if strings.ToLower(matches[1]) == strings.ToLower(event.CloudEvent.Data.VM.Name) {
 									h.Logger.Debug("This disk belongs to this VM")
 									found = true
-									params.UpdateType = "diskchange"
+									diskChangeFound = true
-									diskSize := h.calculateNewDiskSize(event)
+
-									params.NewProvisionedDisk = sql.NullFloat64{Float64: diskSize, Valid: diskSize > 0}
+									// don't need to keep searching through the rest of the backing devices in this VM
+									break
 
 								} else {
 									h.Logger.Debug("This disk belongs to a different VM, don't record this config change")
@@ -157,6 +160,13 @@ func (h *Handler) VmModifyEvent(w http.ResponseWriter, r *http.Request) {
 						}
 					}
 				}
+
+				// If we found a disk change belonging to this VM then recalculate the disk size
+				if diskChangeFound {
+					params.UpdateType = "diskchange"
+					diskSize := h.calculateNewDiskSize(event)
+					params.NewProvisionedDisk = sql.NullFloat64{Float64: diskSize, Valid: diskSize > 0}
+				}
 			}
 		}