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https://issues.apache.org/jira/browse/WW-5355?focusedWorklogId=885239&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-885239
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ASF GitHub Bot logged work on WW-5355:
--------------------------------------
Author: ASF GitHub Bot
Created on: 15/Oct/23 17:35
Start Date: 15/Oct/23 17:35
Worklog Time Spent: 10m
Work Description: ben-manes commented on code in PR #766:
URL: https://github.com/apache/struts/pull/766#discussion_r1359917987
##########
core/src/main/java/com/opensymphony/xwork2/ognl/OgnlCaffeineCache.java:
##########
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2022 Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.opensymphony.xwork2.ognl;
+
+import com.github.benmanes.caffeine.cache.Cache;
+import com.github.benmanes.caffeine.cache.Caffeine;
+
+/**
+ * <p>This OGNL Cache implementation is backed by {@link Caffeine} which uses
the Window TinyLfu algorithm.</p>
+ *
+ * <p>An appropriate eviction limit should be chosen for your specific
application based on factors and requirements
+ * such as:</p>
+ * <ul>
+ * <li>Quantity and complexity of actions</li>
+ * <li>Volume of requests</li>
+ * <li>Rate limits and attack potential/patterns</li>
+ * <li>Memory constraints</li>
+ * </ul>
+ *
+ * @param <K> The type for the cache key entries
+ * @param <V> The type for the cache value entries
+ */
+public class OgnlCaffeineCache<K, V> implements OgnlCache<K, V> {
+
+ private final Cache<K, V> cache;
+ private final int evictionLimit;
+
+ public OgnlCaffeineCache(int evictionLimit, int initialCapacity) {
+ this.evictionLimit = evictionLimit;
+ this.cache =
Caffeine.newBuilder().initialCapacity(initialCapacity).maximumSize(evictionLimit).build();
+ }
+
+ @Override
+ public V get(K key) {
+ return cache.getIfPresent(key);
+ }
+
+ @Override
+ public void put(K key, V value) {
+ cache.put(key, value);
+ }
+
+ @Override
+ public void putIfAbsent(K key, V value) {
+ if (cache.getIfPresent(key) == null) {
+ cache.put(key, value);
+ }
+ }
+
+ @Override
+ public int size() {
+ return Math.toIntExact(cache.estimatedSize());
Review Comment:
`cache.asMap().size()`
Issue Time Tracking
-------------------
Worklog Id: (was: 885239)
Time Spent: 5h 10m (was: 5h)
> Use LRU cache by default
> ------------------------
>
> Key: WW-5355
> URL: https://issues.apache.org/jira/browse/WW-5355
> Project: Struts 2
> Issue Type: Improvement
> Components: Core
> Reporter: Kusal Kithul-Godage
> Priority: Minor
> Fix For: 6.4.0
>
> Time Spent: 5h 10m
> Remaining Estimate: 0h
>
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