Re-add shouldDeleteRoute

controllers/webspherelibertyapplication_controller.go

@@ -971,6 +971,22 @@ func (r *ReconcileWebSphereLiberty) getDNSEgressRule(reqLogger logr.Logger, endp
 	return true, dnsRule
 }
 
+// If a custome hostname was previously set, but is now not set, any previous
+// route needs to be deleted, as the host in a route cannot be unset
+// and the default generated hostname is difficult to manually recreate
+func shouldDeleteRoute(ba common.BaseComponent) bool {
+	rh := ba.GetStatus().GetReferences()[common.StatusReferenceRouteHost]
+	if rh != "" {
+		// The host was previously set.
+		// If the host is now empty, delete the old route
+		rt := ba.GetRoute()
+		if rt == nil || (rt.GetHost() == "" && common.Config[common.OpConfigDefaultHostname] == "") {
+			return true
+		}
+	}
+	return false
+}
+
 func (r *ReconcileWebSphereLiberty) getEndpoints(serviceName string, namespace string) (*corev1.Endpoints, error) {
 	endpoints := &corev1.Endpoints{}
 	if err := r.GetClient().Get(context.TODO(), types.NamespacedName{Name: serviceName, Namespace: namespace}, endpoints); err != nil {