From 5214dce404b0eb8684909dcad17922b0a7305bde Mon Sep 17 00:00:00 2001
From: Artur Signell <artur@vaadin.com>
Date: Thu, 19 Sep 2024 15:19:14 +0300
Subject: [PATCH] fix: Do not throw if re-setting the login view

Fixes #19910
---
 .../vaadin/flow/server/auth/NavigationAccessControl.java | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/flow-server/src/main/java/com/vaadin/flow/server/auth/NavigationAccessControl.java b/flow-server/src/main/java/com/vaadin/flow/server/auth/NavigationAccessControl.java
index 4f76c095d1a..a33042392f8 100644
--- a/flow-server/src/main/java/com/vaadin/flow/server/auth/NavigationAccessControl.java
+++ b/flow-server/src/main/java/com/vaadin/flow/server/auth/NavigationAccessControl.java
@@ -187,6 +187,10 @@ public final boolean isEnabled() {
      *            the Flow view to use as login view
      */
     public final void setLoginView(Class<? extends Component> loginView) {
+        if (loginView == this.loginView) {
+            // Probably hot reload
+            return;
+        }
         throwIfLoginViewSet();
         this.loginView = loginView;
     }
@@ -210,6 +214,11 @@ protected Class<? extends Component> getLoginView() {
      *            the frontend view to use as login view
      */
     public void setLoginView(String loginUrl) {
+        if (loginUrl == this.loginUrl) {
+            // Probably hot reload
+            return;
+        }
+
         throwIfLoginViewSet();
         this.loginUrl = loginUrl;
     }