Index: main/plugin-web/src/org/ametys/web/cache/pageelement/PageElementCache.java
===================================================================
--- main/plugin-web/src/org/ametys/web/cache/pageelement/PageElementCache.java	(revision 33486)
+++ main/plugin-web/src/org/ametys/web/cache/pageelement/PageElementCache.java	(working copy)
@@ -23,6 +23,7 @@
 import java.util.concurrent.atomic.AtomicInteger;
 
 import org.apache.avalon.framework.activity.Disposable;
+import org.apache.avalon.framework.activity.Initializable;
 import org.apache.avalon.framework.component.Component;
 import org.apache.avalon.framework.context.Context;
 import org.apache.avalon.framework.context.ContextException;
@@ -38,7 +39,7 @@
  * Cache the page elements renderings.<br>
  * This class handles several caches, one per site and per JCR workspace.
  */
-public class PageElementCache extends AbstractLogEnabled implements Component, Contextualizable, Disposable
+public class PageElementCache extends AbstractLogEnabled implements Component, Contextualizable, Disposable, Initializable
 {
     /** Avalon role. */
     public static final String ROLE = PageElementCache.class.getName();
@@ -49,6 +50,9 @@
     // Map<workspace, Map<site, Map<elementType, Map<elementId, Map<subelementId, Map<renderingContext, SaxBuffer>>>>>>
     private Map<String, Map<String, Map<String, Map<String, Map<String, Map<RenderingContext, SaxBuffer>>>>>> _cache = new HashMap<>();
     
+    // Cache<CacheKey, Map<subelementId, Map<renderingContext, SaxBuffer>>>
+    //private Cache<CacheKey, Map<String, Map<RenderingContext, SaxBuffer>>> _cache;
+    
     // Map<workspace, Map<site, Map<elementType, hitCount>>>
     private Map<String, Map<String, Map<String, AtomicInteger>>> _currentHitCount = new HashMap<>();
     
@@ -66,6 +70,12 @@
         _context = context;
     }
     
+    @Override
+    public void initialize() throws Exception
+    {
+        //_cache = CacheBuilder.newBuilder().maximumSize(10).build();
+    }
+    
     /**
      * Add a content in the cache.
      * @param workspace the current JCR workspace.
@@ -579,4 +589,38 @@
         }
     }
     
+    private static class CacheKey
+    {
+        String _workspace;
+        String _site;
+        String _pageElementType;
+        String _elementId;
+        
+        CacheKey(String workspace, String site, String pageElementType, String elementId)
+        {
+            _workspace = workspace;
+            _site = site;
+            _pageElementType = pageElementType;
+            _elementId = elementId;
+        }
+        
+        @Override
+        public int hashCode()
+        {
+            return _workspace.hashCode() + _site.hashCode() + _pageElementType.hashCode() + _elementId.hashCode();
+        }
+        
+        @Override
+        public boolean equals(Object obj)
+        {
+            if (!(obj instanceof CacheKey))
+            {
+                return false;
+            }
+            
+            CacheKey key = (CacheKey) obj;
+            
+            return _workspace.equals(key._workspace) && _site.equals(key._site) && _pageElementType.equals(key._pageElementType) && _elementId.equals(key._elementId);
+        }
+    }
 }