[wicket] branch master updated: WICKET-6800 AjaxRequestHandler: Keep listeners in a LinkedHashSet instead of LinkedList for performance reason (#438)

[mg...@apache.org]

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mgrigorov pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/wicket.git


The following commit(s) were added to refs/heads/master by this push:
     new 5c63eb5  WICKET-6800 AjaxRequestHandler: Keep listeners in a LinkedHashSet instead of LinkedList for performance reason (#438)
5c63eb5 is described below

commit 5c63eb59510d954f52150f069690a528849cd803
Author: Urs Joss <ur...@gmx.ch>
AuthorDate: Mon Jul 6 10:25:55 2020 +0200

    WICKET-6800 AjaxRequestHandler: Keep listeners in a LinkedHashSet instead of LinkedList for performance reason (#438)
---
 .../src/main/java/org/apache/wicket/ajax/AjaxRequestHandler.java  | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/wicket-core/src/main/java/org/apache/wicket/ajax/AjaxRequestHandler.java b/wicket-core/src/main/java/org/apache/wicket/ajax/AjaxRequestHandler.java
index bf64a80..29cf097 100644
--- a/wicket-core/src/main/java/org/apache/wicket/ajax/AjaxRequestHandler.java
+++ b/wicket-core/src/main/java/org/apache/wicket/ajax/AjaxRequestHandler.java
@@ -19,7 +19,7 @@ package org.apache.wicket.ajax;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashSet;
-import java.util.LinkedList;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -84,8 +84,8 @@ public class AjaxRequestHandler extends AbstractPartialPageRequestHandler implem
 	 */
 	private final PartialPageUpdate update;
 
-	/** a list of listeners */
-	private List<AjaxRequestTarget.IListener> listeners = null;
+	/** a set of listeners */
+	private Set<AjaxRequestTarget.IListener> listeners = null;
 
 	/** */
 	private final Set<ITargetRespondListener> respondListeners = new HashSet<>();
@@ -174,7 +174,7 @@ public class AjaxRequestHandler extends AbstractPartialPageRequestHandler implem
 
 		if (listeners == null)
 		{
-			listeners = new LinkedList<>();
+			listeners = new LinkedHashSet<>();
 		}
 
 		if (!listeners.contains(listener))