http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/core/request/mapper/TestMapperContext.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/core/request/mapper/TestMapperContext.java
 
b/wicket-core/src/test/java/org/apache/wicket/core/request/mapper/TestMapperContext.java
index a1b960d..c1d7737 100644
--- 
a/wicket-core/src/test/java/org/apache/wicket/core/request/mapper/TestMapperContext.java
+++ 
b/wicket-core/src/test/java/org/apache/wicket/core/request/mapper/TestMapperContext.java
@@ -20,19 +20,20 @@ import org.apache.wicket.MockPage;
 import org.apache.wicket.WicketRuntimeException;
 import org.apache.wicket.core.request.handler.PageProvider;
 import org.apache.wicket.markup.MarkupParser;
-import org.apache.wicket.page.IPageManagerContext;
-import org.apache.wicket.page.PageStoreManager;
-import org.apache.wicket.pageStore.DefaultPageStore;
-import org.apache.wicket.pageStore.IDataStore;
-import org.apache.wicket.pageStore.IPageStore;
-import org.apache.wicket.pageStore.memory.DummyPageManagerContext;
+import org.apache.wicket.mock.MockPageStore;
+import org.apache.wicket.page.IPageManager;
+import org.apache.wicket.page.PageManager;
+import org.apache.wicket.pageStore.DummyPageContext;
+import org.apache.wicket.pageStore.IPageContext;
+import org.apache.wicket.pageStore.InMemoryPageStore;
+import org.apache.wicket.pageStore.RequestPageStore;
+import org.apache.wicket.pageStore.InSessionPageStore;
 import org.apache.wicket.request.component.IRequestablePage;
 import org.apache.wicket.request.mapper.parameter.PageParameters;
 import org.apache.wicket.request.resource.ResourceReference;
 import org.apache.wicket.request.resource.ResourceReference.Key;
 import org.apache.wicket.request.resource.ResourceReferenceRegistry;
 import org.apache.wicket.serialize.java.JavaSerializer;
-import org.apache.wicket.versioning.InMemoryPageStore;
 
 /**
  * Simple {@link IMapperContext} implementation for testing purposes
@@ -43,10 +44,10 @@ public class TestMapperContext implements IMapperContext
 {
        private static final String APP_NAME = "test_app";
        private static int count;
-       IDataStore dataStore;
-       IPageStore pageStore;
-       IPageManagerContext pageManagerContext;
-       PageStoreManager pageManager;
+
+       InSessionPageStore pageStore;
+       DummyPageContext pageContext;
+       IPageManager pageManager;
        private String appName;
        private boolean createMockPageIfInstanceNotFound = true;
 
@@ -56,10 +57,18 @@ public class TestMapperContext implements IMapperContext
        public TestMapperContext()
        {
                appName = APP_NAME + count++;
-               dataStore = new InMemoryPageStore();
-               pageStore = new DefaultPageStore(new JavaSerializer(appName), 
dataStore, 4);
-               pageManagerContext = new DummyPageManagerContext();
-               pageManager = new PageStoreManager(appName, pageStore, 
pageManagerContext);
+               
+               pageContext = new DummyPageContext();
+               
+               InMemoryPageStore inMemoryPageStore = new 
InMemoryPageStore(appName, Integer.MAX_VALUE);
+               pageStore = new InSessionPageStore(inMemoryPageStore, new 
JavaSerializer(appName), 4);
+               pageManager = new PageManager(new RequestPageStore(pageStore)) {
+                       @Override
+                       protected IPageContext createPageContext()
+                       {
+                               return pageContext;
+                       }
+               };
        }
 
        /**
@@ -67,17 +76,17 @@ public class TestMapperContext implements IMapperContext
         */
        public void cleanSessionCache()
        {
-               getPageManager().getContext().setRequestData(null);
+               pageContext.clearRequest();
                MockPage other = new MockPage();
                other.setPageId(Integer.MAX_VALUE);
-               getPageManager().touchPage(other);
-               getPageManager().commitRequest();
+               getPageManager().addPage(other);
+               pageManager.detach();
        }
 
        /**
         * @return pageManager
         */
-       public PageStoreManager getPageManager()
+       public IPageManager getPageManager()
        {
                return pageManager;
        }

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/dontstoreunrendered/DontStoreNotRenderedPageTestCase.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/dontstoreunrendered/DontStoreNotRenderedPageTestCase.java
 
b/wicket-core/src/test/java/org/apache/wicket/dontstoreunrendered/DontStoreNotRenderedPageTestCase.java
index fe1875b..f49a384 100644
--- 
a/wicket-core/src/test/java/org/apache/wicket/dontstoreunrendered/DontStoreNotRenderedPageTestCase.java
+++ 
b/wicket-core/src/test/java/org/apache/wicket/dontstoreunrendered/DontStoreNotRenderedPageTestCase.java
@@ -22,8 +22,6 @@ import 
org.apache.wicket.application.IComponentInstantiationListener;
 import org.apache.wicket.behavior.Behavior;
 import org.apache.wicket.mock.MockPageManager;
 import org.apache.wicket.page.IManageablePage;
-import org.apache.wicket.page.IPageManager;
-import org.apache.wicket.page.IPageManagerContext;
 import org.apache.wicket.protocol.http.WebApplication;
 import org.apache.wicket.util.tester.WicketTestCase;
 import org.apache.wicket.util.tester.WicketTester;
@@ -55,21 +53,16 @@ public abstract class DontStoreNotRenderedPageTestCase 
extends WicketTestCase
                        @Override
                        protected IPageManagerProvider 
newTestPageManagerProvider()
                        {
-                               return new IPageManagerProvider()
-                               {
-                                       @Override
-                                       public IPageManager 
apply(IPageManagerContext context)
+                               return () -> {
+                                       return new MockPageManager()
                                        {
-                                               return new MockPageManager()
+                                               @Override
+                                               public void 
addPage(IManageablePage page)
                                                {
-                                                       @Override
-                                                       public void 
touchPage(IManageablePage page)
-                                                       {
-                                                               
Assert.assertFalse("PageB should not be touched!", page instanceof PageB);
-                                                               
super.touchPage(page);
-                                                       }
-                                               };
-                                       }
+                                                       
Assert.assertFalse("PageB should not be touched!", page instanceof PageB);
+                                                       super.addPage(page);
+                                               }
+                                       };
                                };
                        }
                };

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/markup/html/TransparentWebMarkupContainerTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/markup/html/TransparentWebMarkupContainerTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/markup/html/TransparentWebMarkupContainerTest.java
index 39586e0..6ec0066 100644
--- 
a/wicket-core/src/test/java/org/apache/wicket/markup/html/TransparentWebMarkupContainerTest.java
+++ 
b/wicket-core/src/test/java/org/apache/wicket/markup/html/TransparentWebMarkupContainerTest.java
@@ -34,7 +34,7 @@ import org.apache.wicket.markup.html.panel.Fragment;
 import org.apache.wicket.mock.MockPageManager;
 import org.apache.wicket.page.IManageablePage;
 import org.apache.wicket.page.IPageManager;
-import org.apache.wicket.page.IPageManagerContext;
+import org.apache.wicket.pageStore.IPageContext;
 import org.apache.wicket.request.mapper.parameter.PageParameters;
 import org.apache.wicket.util.resource.IResourceStream;
 import org.apache.wicket.util.resource.StringResourceStream;
@@ -117,15 +117,15 @@ public class TransparentWebMarkupContainerTest extends 
WicketTestCase
                                return new IPageManagerProvider()
                                {
                                        @Override
-                                       public IPageManager 
apply(IPageManagerContext context)
+                                       public IPageManager get()
                                        {
                                                return new MockPageManager()
                                                {
                                                        @Override
-                                                       public void 
touchPage(IManageablePage page)
+                                                       public void 
addPage(IManageablePage page)
                                                        {
                                                                page = 
WicketObjects.cloneObject(page);
-                                                               
super.touchPage(page);
+                                                               
super.addPage(page);
                                                        }
                                                };
                                        }

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/page/PageAccessSynchronizerTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/page/PageAccessSynchronizerTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/page/PageAccessSynchronizerTest.java
index e2053df..eeb9ba3 100644
--- 
a/wicket-core/src/test/java/org/apache/wicket/page/PageAccessSynchronizerTest.java
+++ 
b/wicket-core/src/test/java/org/apache/wicket/page/PageAccessSynchronizerTest.java
@@ -324,7 +324,7 @@ public class PageAccessSynchronizerTest extends Assert
 
                int pageId = 1;
                IManageablePage page = new MockPage(pageId);
-               synchronizedPageManager.touchPage(page);
+               synchronizedPageManager.addPage(page);
                synchronizedPageManager.getPage(pageId);
                PageLock pageLock2 = locks.get(Integer.valueOf(pageId));
                assertNotNull(pageLock2);

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/page/PersistentPageManagerTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/page/PersistentPageManagerTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/page/PersistentPageManagerTest.java
index 23fe264..cb39d94 100644
--- 
a/wicket-core/src/test/java/org/apache/wicket/page/PersistentPageManagerTest.java
+++ 
b/wicket-core/src/test/java/org/apache/wicket/page/PersistentPageManagerTest.java
@@ -19,19 +19,19 @@ package org.apache.wicket.page;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 
-import java.io.ByteArrayInputStream;
 import java.io.IOException;
-import java.io.ObjectInputStream;
 import java.io.Serializable;
+import java.util.concurrent.atomic.AtomicReference;
 
 import org.apache.wicket.Application;
+import org.apache.wicket.MetaDataKey;
 import org.apache.wicket.ThreadContext;
-import org.apache.wicket.pageStore.DefaultPageStore;
-import org.apache.wicket.pageStore.IDataStore;
+import org.apache.wicket.pageStore.DummyPageContext;
+import org.apache.wicket.pageStore.IPageContext;
 import org.apache.wicket.pageStore.IPageStore;
-import org.apache.wicket.pageStore.memory.DummyPageManagerContext;
+import org.apache.wicket.pageStore.InSessionPageStore;
+import org.apache.wicket.pageStore.NoopPageStore;
 import org.apache.wicket.serialize.java.JavaSerializer;
-import org.apache.wicket.versioning.InMemoryPageStore;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -58,44 +58,43 @@ public class PersistentPageManagerTest
                ThreadContext.detach();
 
                // create IPageManager (with IPageStore) and store a page 
instance
-               IPageManager pageManager = newPersistentPageManager(APP_NAME);
+               final AtomicReference<Object> sessionData = new 
AtomicReference<Object>(null);
+               
+               IPageManager pageManager = createPageManager(APP_NAME, 
sessionData);
+
+               // add a page
                TestPage toSerializePage = new TestPage();
-               pageManager.touchPage(toSerializePage);
-               pageManager.commitRequest();
+               pageManager.addPage(toSerializePage);
+               pageManager.detach();
 
                // get the stored SessionEntry
-               Serializable sessionEntry = 
pageManager.getContext().getSessionAttribute(null);
+               assertNotNull(sessionData.get());
 
                // destroy the manager and the store
                pageManager.destroy();
 
                // simulate persisting of the http sessions initiated by the 
web container
-               byte[] serializedSessionEntry = new 
JavaSerializer(APP_NAME).serialize(sessionEntry);
+               byte[] serializedSessionData = new 
JavaSerializer(APP_NAME).serialize(sessionData.get());
                assertNotNull("Wicket needs to be able to serialize the session 
entry",
-                       serializedSessionEntry);
-
-               // simulate loading of the persisted http session initiated by 
the web container
-               // when starting an application
-               ObjectInputStream in = new ObjectInputStream(new 
ByteArrayInputStream(
-                       serializedSessionEntry));
+                       serializedSessionData);
 
                // WicketFilter is not initialized so there is no Application 
available yet
                Assert.assertFalse("Worker thread should be unaware of Wicket 
application",
                        Application.exists());
 
-               assertEquals(APP_NAME, in.readObject());
+               // simulate loading of the persisted http session initiated by 
the web container
+               // when starting an application
+               sessionData.set(new 
JavaSerializer(APP_NAME).deserialize(serializedSessionData));
 
                // without available IPageStore the read SessionEntry holds
                // the IManageablePage itself, not SerializedPage
-               Serializable loadedSessionEntry = (Serializable)in.readObject();
                assertNotNull(
                        "Wicket needs to be able to deserialize the session 
entry regardless the application availability",
-                       loadedSessionEntry);
+                       sessionData.get());
 
                // provide new IPageStore which will read IManageablePage's or 
SerializedPage's
                // from the SessionEntry's
-               IPageManager newPageManager = 
newPersistentPageManager(APP_NAME);
-               newPageManager.getContext().setSessionAttribute(null, 
loadedSessionEntry);
+               IPageManager newPageManager = createPageManager(APP_NAME, 
sessionData);
 
                TestPage deserializedPage = 
(TestPage)newPageManager.getPage(toSerializePage.getPageId());
                assertNotNull(deserializedPage);
@@ -104,12 +103,34 @@ public class PersistentPageManagerTest
                newPageManager.destroy();
        }
 
-       private PageStoreManager newPersistentPageManager(String appName)
+       /**
+        * Create a manager that stores session data in the given atomic 
reference.
+        */
+       private IPageManager createPageManager(String appName, 
AtomicReference<Object> sessionData)
        {
-               IDataStore dataStore = new InMemoryPageStore();
-               IPageStore pageStore = new DefaultPageStore(new 
JavaSerializer(appName), dataStore, 4);
-               IPageManagerContext pageManagerContext = new 
DummyPageManagerContext();
-               return new PageStoreManager(appName, pageStore, 
pageManagerContext);
+               IPageStore store = new InSessionPageStore(new NoopPageStore(), 
new JavaSerializer(APP_NAME), Integer.MAX_VALUE);
+               
+               return new PageManager(store) {
+                       @Override
+                       protected IPageContext createPageContext()
+                       {
+                               return new DummyPageContext() {
+                                       @Override
+                                       public <T extends Serializable> void 
setSessionData(MetaDataKey<T> key, T value)
+                                       {
+                                               super.setSessionData(key, 
value);
+                                               
+                                               sessionData.set(value);
+                                       }
+                                       
+                                       @Override
+                                       public <T extends Serializable> T 
getSessionData(MetaDataKey<T> key)
+                                       {
+                                               return (T)sessionData.get();
+                                       }
+                               };
+                       }
+               };
        }
 
        private static class TestPage implements IManageablePage

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/page/persistent/disk/PageWindowManagerTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/page/persistent/disk/PageWindowManagerTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/page/persistent/disk/PageWindowManagerTest.java
deleted file mode 100644
index 1270800..0000000
--- 
a/wicket-core/src/test/java/org/apache/wicket/page/persistent/disk/PageWindowManagerTest.java
+++ /dev/null
@@ -1,301 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.wicket.page.persistent.disk;
-
-import java.security.SecureRandom;
-import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
-import org.apache.wicket.pageStore.PageWindowManager;
-import org.apache.wicket.pageStore.PageWindowManager.PageWindow;
-import org.junit.Assert;
-import org.junit.Test;
-
-/**
- * @author Matej Knopp
- */
-public class PageWindowManagerTest extends Assert
-{
-       /**
-        * https://issues.apache.org/jira/browse/WICKET-4572
-        */
-       @Test
-       public void removeObsoleteIndices()
-       {
-               int page0id = 0,
-                       page1id = 1,
-                       page2id = 2;
-               int maxSize = 10;
-
-               PageWindowManager manager = new PageWindowManager(maxSize);
-
-               // Add few pages.
-               // All of them fully occupy the max space in the 
pageWindowManager.
-               // So adding N+1st page removes the Nth page.
-               manager.createPageWindow(page0id, maxSize);
-               PageWindow page0Window = manager.getPageWindow(page0id);
-               assertWindow(page0Window, page0id, 
page0Window.getFilePartOffset(), page0Window.getFilePartSize());
-
-               manager.createPageWindow(page1id, maxSize);
-               PageWindow page1Window = manager.getPageWindow(page1id);
-               assertWindow(page1Window, page1id, 
page1Window.getFilePartOffset(), page1Window.getFilePartSize());
-
-               // Try to get a page which has been lost with the adding of 
page1
-               assertNull("Page0 must be lost when Page1 has been added.", 
manager.getPageWindow(page0id));
-
-               manager.createPageWindow(page2id, maxSize);
-               PageWindow page2Window = manager.getPageWindow(page2id);
-               assertWindow(page2Window, page2id, 
page2Window.getFilePartOffset(), page2Window.getFilePartSize());
-
-               // Try to get a page which has been lost with the adding of 
page2
-               assertNull("Page1 must be lost when Page2 has been added.", 
manager.getPageWindow(page1id));
-       }
-
-       /**
-        * 
-        */
-       @Test
-       public void addRemove()
-       {
-               PageWindowManager manager = new PageWindowManager(300);
-               PageWindow window;
-
-               window = manager.createPageWindow(1, 50);
-               assertWindow(window, 1, 0, 50);
-
-               window = manager.createPageWindow(2, 40);
-               assertWindow(window, 2, 50, 40);
-
-               assertEquals(manager.getTotalSize(), 90);
-
-               window = manager.createPageWindow(2, 30);
-               assertWindow(window, 2, 50, 30);
-               assertEquals(manager.getTotalSize(), 80);
-
-               manager.removePage(2);
-               assertEquals(manager.getTotalSize(), 50);
-
-               window = manager.createPageWindow(3, 30);
-               assertWindow(window, 3, 50, 30);
-               assertEquals(manager.getTotalSize(), 80);
-       }
-
-       /**
-        * 
-        */
-       @Test
-       public void pageWindowCycle()
-       {
-               PageWindowManager manager = new PageWindowManager(100);
-               PageWindow window;
-
-               window = manager.createPageWindow(1, 30);
-
-               window = manager.createPageWindow(2, 30);
-
-               window = manager.createPageWindow(3, 30);
-
-               assertWindow(window, 3, 60, 30);
-
-               window = manager.createPageWindow(4, 30);
-
-               assertWindow(window, 4, 90, 30);
-
-               // should start at the beginging
-
-               window = manager.createPageWindow(5, 20);
-
-               assertWindow(window, 5, 0, 20);
-
-               assertNull(manager.getPageWindow(1));
-
-               window = manager.getPageWindow(2);
-               assertWindow(window, 2, 30, 30);
-
-               window = manager.createPageWindow(6, 10);
-
-               assertWindow(window, 6, 20, 10);
-
-               window = manager.getPageWindow(2);
-               assertWindow(window, 2, 30, 30);
-
-               window = manager.createPageWindow(6, 30);
-               assertWindow(window, 6, 20, 30);
-
-               assertNull(manager.getPageWindow(2));
-               assertNotNull(manager.getPageWindow(3));
-
-               window = manager.createPageWindow(6, 60);
-               assertWindow(window, 6, 20, 60);
-
-               assertNull(manager.getPageWindow(3));
-
-               window = manager.createPageWindow(7, 20);
-               assertWindow(window, 7, 80, 20);
-
-               assertNotNull(manager.getPageWindow(7));
-
-               // should start at the beginning again
-
-               window = manager.createPageWindow(8, 10);
-               assertWindow(window, 8, 0, 10);
-
-               assertNull(manager.getPageWindow(5));
-               assertNotNull(manager.getPageWindow(6));
-
-               window = manager.createPageWindow(9, 20);
-               assertWindow(window, 9, 10, 20);
-
-               assertNull(manager.getPageWindow(6));
-               assertNotNull(manager.getPageWindow(7));
-
-               window = manager.createPageWindow(10, 20);
-               assertWindow(window, 10, 30, 20);
-
-               assertNull(manager.getPageWindow(6));
-               assertNotNull(manager.getPageWindow(7));
-
-               // make sure when replacing a page that's not last the old 
"instance" is
-               // not valid anymore
-
-               manager.createPageWindow(8, 10);
-
-               window = manager.getPageWindow(8);
-               assertWindow(window, 8, 50, 10);
-       }
-
-
-       private void assertWindow(PageWindow window, int pageId, int 
filePartOffset, int filePartSize)
-       {
-               assertTrue(window.getPageId() == pageId && 
window.getFilePartOffset() == filePartOffset &&
-                       window.getFilePartSize() == filePartSize);
-       }
-
-       /** how many operations to execute */
-       private static final int EXECUTIONS = 10000;
-
-       /** used to wait the executions */
-       private static final CountDownLatch LATCH = new 
CountDownLatch(EXECUTIONS);
-
-       private final PageWindowManager pageWindowManager = new 
PageWindowManager(1000L);
-
-       /** the execution types */
-       private final Runnable[] TASKS = new Runnable[]
-       {
-               new CreatePageWindowTask(pageWindowManager),
-               new GetPageWindowTask(pageWindowManager),
-               new RemovePageInSessionTask(pageWindowManager)
-       };
-
-       private static final SecureRandom RND = new SecureRandom();
-
-       /**
-        * Executes random mutator and accessor operations on {@link 
org.apache.wicket.pageStore.AsynchronousDataStore} validating
-        * that the used data structures can be used simultaneously.
-        *
-        * @throws Exception
-        */
-       @Test
-       public void randomOperations() throws Exception
-       {
-               ExecutorService executorService = 
Executors.newFixedThreadPool(50);
-
-               for (int i = 0; i < EXECUTIONS; i++)
-               {
-                       Runnable task = TASKS[RND.nextInt(TASKS.length)];
-                       executorService.submit(task);
-               }
-               LATCH.await();
-               executorService.shutdown();
-       }
-
-       private static abstract class AbstractTask implements Runnable
-       {
-               /** the ids for the stored/removed pages */
-               private static final int[] PAGE_IDS = new int[] { 1, 2, 3, 4, 
5, 6, 7, 8, 9, 10 };
-
-               protected final PageWindowManager pageWindowManager;
-
-               private AbstractTask(PageWindowManager pageWindowManager)
-               {
-                       this.pageWindowManager = pageWindowManager;
-               }
-
-               protected abstract void r();
-
-               @Override
-               public void run()
-               {
-                       try
-                       {
-                               r();
-                       }
-                       finally
-                       {
-                               LATCH.countDown();
-                       }
-               }
-
-               protected int getPageId()
-               {
-                       return PAGE_IDS[RND.nextInt(PAGE_IDS.length)];
-               }
-       }
-
-       private static class CreatePageWindowTask extends AbstractTask
-       {
-               private CreatePageWindowTask(PageWindowManager 
pageWindowManager)
-               {
-                       super(pageWindowManager);
-               }
-
-               @Override
-               public void r()
-               {
-                       pageWindowManager.createPageWindow(getPageId(), 1000);
-               }
-       }
-
-       private static class GetPageWindowTask extends AbstractTask
-       {
-               private GetPageWindowTask(PageWindowManager pageWindowManager)
-               {
-                       super(pageWindowManager);
-               }
-
-               @Override
-               public void r()
-               {
-                       pageWindowManager.getPageWindow(getPageId());
-               }
-       }
-
-       private static class RemovePageInSessionTask extends AbstractTask
-       {
-               private RemovePageInSessionTask(PageWindowManager 
pageWindowManager)
-               {
-                       super(pageWindowManager);
-               }
-
-               @Override
-               public void r()
-               {
-                       pageWindowManager.removePage(getPageId());
-               }
-       }
-}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/AbstractPageStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/AbstractPageStoreTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/AbstractPageStoreTest.java
index 0ab35fd..d662b5a 100644
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/AbstractPageStoreTest.java
+++ 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/AbstractPageStoreTest.java
@@ -29,17 +29,16 @@ public abstract class AbstractPageStoreTest extends Assert
        protected final String sessionId = "1234567890";
        protected final int pageId = 123;
        protected final ISerializer serializer = new 
JavaSerializer(getClass().getName());
-       protected final IDataStore dataStore = new NoopDataStore();
        protected int maxEntries = 1;
        protected IPageStore pageStore = null;
 
        @Before
        public void before()
        {
-               pageStore = createPageStore(serializer, dataStore, maxEntries);
+               pageStore = createPageStore(serializer, maxEntries);
        }
 
-       protected abstract IPageStore createPageStore(ISerializer serializer, 
IDataStore dataStore, int maxEntries);
+       protected abstract IPageStore createPageStore(ISerializer serializer, 
int maxEntries);
 
        @After
        public void after()
@@ -57,9 +56,11 @@ public abstract class AbstractPageStoreTest extends Assert
        @Test
        public void storePage()
        {
-               pageStore.storePage(sessionId, new MockPage(pageId));
+               IPageContext context = new DummyPageContext(sessionId);
+               
+               pageStore.addPage(context, new MockPage(pageId));
 
-               assertNotNull(pageStore.getPage(sessionId, pageId));
+               assertNotNull(pageStore.getPage(context, pageId));
        }
 
        /**
@@ -68,46 +69,51 @@ public abstract class AbstractPageStoreTest extends Assert
        @Test
        public void storePage2()
        {
+               IPageContext context = new DummyPageContext(sessionId);
                int maxEntries = 10;
 
-               pageStore = createPageStore(serializer, dataStore, maxEntries);
+               pageStore = createPageStore(serializer, maxEntries);
 
-               pageStore.storePage(sessionId, new MockPage(pageId));
-               pageStore.storePage(sessionId, new MockPage(pageId));
+               pageStore.addPage(context, new MockPage(pageId));
+               pageStore.addPage(context, new MockPage(pageId));
 
-               assertNotNull(pageStore.getPage(sessionId, pageId));
+               assertNotNull(pageStore.getPage(context, pageId));
 
-               pageStore.removePage(sessionId, pageId);
+               pageStore.removePage(context, new MockPage(pageId));
 
-               assertNull(pageStore.getPage(sessionId, pageId));
+               assertNull(pageStore.getPage(context, pageId));
        }
 
        @Test
        public void removePage()
        {
-               pageStore.storePage(sessionId, new MockPage(pageId));
+               IPageContext context = new DummyPageContext(sessionId);
+               
+               pageStore.addPage(context, new MockPage(pageId));
 
-               assertNotNull(pageStore.getPage(sessionId, pageId));
+               assertNotNull(pageStore.getPage(context, pageId));
 
-               pageStore.removePage(sessionId, pageId);
+               pageStore.removePage(context, new MockPage(pageId));
 
-               assertNull(pageStore.getPage(sessionId, pageId));
+               assertNull(pageStore.getPage(context, pageId));
        }
 
        /**
-        * Verify that at most {@code maxEntries} per session can be put in the 
cache
+        * Verify that at most {@code maxEntries} per session can be put in the 
store
         */
        @Test
        public void maxSizeSameSession()
        {
-               pageStore.storePage(sessionId, new MockPage(pageId));
+               IPageContext context = new DummyPageContext(sessionId);
+               
+               pageStore.addPage(context, new MockPage(pageId));
 
-               assertNotNull(pageStore.getPage(sessionId, pageId));
+               assertNotNull(pageStore.getPage(context, pageId));
 
                int pageId2 = 234;
-               pageStore.storePage(sessionId, new MockPage(pageId2));
-               assertNull(pageStore.getPage(sessionId, pageId));
-               assertNotNull(pageStore.getPage(sessionId, pageId2));
+               pageStore.addPage(context, new MockPage(pageId2));
+               assertNull(pageStore.getPage(context, pageId));
+               assertNotNull(pageStore.getPage(context, pageId2));
        }
 
        /**
@@ -117,15 +123,16 @@ public abstract class AbstractPageStoreTest extends Assert
        @Test
        public void maxSizeDifferentSessions()
        {
-               String sessionId2 = "0987654321";
+               IPageContext context = new DummyPageContext(sessionId);
+               IPageContext context2 = new DummyPageContext("0987654321");
 
-               pageStore.storePage(sessionId, new MockPage(pageId));
+               pageStore.addPage(context, new MockPage(pageId));
 
-               assertNotNull(pageStore.getPage(sessionId, pageId));
+               assertNotNull(pageStore.getPage(context, pageId));
 
-               pageStore.storePage(sessionId2, new MockPage(pageId));
+               pageStore.addPage(context2, new MockPage(pageId));
 
-               assertNull(pageStore.getPage(sessionId, pageId));
-               assertNotNull(pageStore.getPage(sessionId2, pageId));
+               assertNotNull(pageStore.getPage(context, pageId));
+               assertNotNull(pageStore.getPage(context2, pageId));
        }
 }

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousDataStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousDataStoreTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousDataStoreTest.java
index 7f5b2c1..7c0b0a7 100644
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousDataStoreTest.java
+++ 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousDataStoreTest.java
@@ -21,7 +21,8 @@ import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
-import org.apache.wicket.versioning.InMemoryPageStore;
+import org.apache.wicket.MockPage;
+import org.apache.wicket.page.IManageablePage;
 import org.junit.Test;
 
 /**
@@ -29,17 +30,13 @@ import org.junit.Test;
  */
 public class AsynchronousDataStoreTest
 {
-//     private static final IDataStore WRAPPED_DATA_STORE = new 
DiskDataStore("asyncDataStoreApp", new 
StoreSettings(null).getFileStoreFolder(), Bytes.kilobytes(1));
-       private static final IDataStore WRAPPED_DATA_STORE = new 
InMemoryPageStore();
+       private static final IPageStore WRAPPED_PAGE_STORE = new 
InMemoryPageStore("test", Integer.MAX_VALUE);
 
        /** the data store under test */
-       private static final IDataStore DATA_STORE = new 
AsynchronousDataStore(WRAPPED_DATA_STORE, 100);
-
-       /** the data for each page */
-       private static final byte[] DATA = new byte[] { 1, 2, 3 };
+       private static final IPageStore ASYNC_PAGE_STORE = new 
AsynchronousPageStore(WRAPPED_PAGE_STORE, 100);
 
        /** the used jsessionid's */
-       private static final String[] SESSIONS = new String[] { "s1", "s2", 
"s3" };
+       private static final IPageContext[] CONTEXT = new IPageContext[] { 
createContext("s1"), createContext("s2"), createContext("s3")};
 
        /** the ids for the stored/removed pages */
        private static final int[] PAGE_IDS = new int[] { 1, 2, 3, 4, 5, 6, 7, 
8, 9, 10 };
@@ -74,7 +71,12 @@ public class AsynchronousDataStoreTest
                }
                LATCH.await();
                executorService.shutdown();
-               DATA_STORE.destroy();
+               ASYNC_PAGE_STORE.destroy();
+       }
+
+       private static IPageContext createContext(String sessionId)
+       {
+               return new DummyPageContext(sessionId);
        }
 
        private static abstract class AbstractTask implements Runnable
@@ -94,15 +96,20 @@ public class AsynchronousDataStoreTest
                        }
                }
 
-               protected String getSessionId()
+               protected IPageContext getPageContext()
                {
-                       return SESSIONS[RND.nextInt(SESSIONS.length)];
+                       return CONTEXT[RND.nextInt(CONTEXT.length)];
                }
 
                protected int getPageId()
                {
                        return PAGE_IDS[RND.nextInt(PAGE_IDS.length)];
                }
+               
+               protected IManageablePage getPage()
+               {
+                       return new MockPage(getPageId());
+               }
        }
 
        private static class StoreTask extends AbstractTask
@@ -110,7 +117,7 @@ public class AsynchronousDataStoreTest
                @Override
                public void r()
                {
-                       DATA_STORE.storeData(getSessionId(), getPageId(), DATA);
+                       ASYNC_PAGE_STORE.addPage(getPageContext(), getPage());
                }
        }
 
@@ -119,7 +126,7 @@ public class AsynchronousDataStoreTest
                @Override
                public void r()
                {
-                       DATA_STORE.getData(getSessionId(), getPageId());
+                       ASYNC_PAGE_STORE.getPage(getPageContext(), getPageId());
                }
        }
 
@@ -128,7 +135,7 @@ public class AsynchronousDataStoreTest
                @Override
                public void r()
                {
-                       DATA_STORE.removeData(getSessionId(), getPageId());
+                       ASYNC_PAGE_STORE.removePage(getPageContext(), 
getPage());
                }
        }
 
@@ -137,7 +144,7 @@ public class AsynchronousDataStoreTest
                @Override
                public void r()
                {
-                       DATA_STORE.removeData(getSessionId());
+                       ASYNC_PAGE_STORE.removeAllPages(getPageContext());
                }
        }
 }

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousPageStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousPageStoreTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousPageStoreTest.java
index 4b17f69..1752e50 100644
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousPageStoreTest.java
+++ 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/AsynchronousPageStoreTest.java
@@ -17,21 +17,19 @@
 package org.apache.wicket.pageStore;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertTrue;
-import static org.mockito.Mockito.never;
-import static org.mockito.Mockito.spy;
-import static org.mockito.Mockito.times;
-import static org.mockito.Mockito.verify;
+import static org.junit.Assert.fail;
 
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
 
-import com.google.common.base.Stopwatch;
 import org.apache.commons.lang3.RandomUtils;
+import org.apache.wicket.mock.MockPageStore;
 import org.apache.wicket.page.IManageablePage;
 import org.apache.wicket.serialize.ISerializer;
 import org.apache.wicket.serialize.java.DeflatedJavaSerializer;
@@ -43,6 +41,8 @@ import org.junit.experimental.categories.Category;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.google.common.base.Stopwatch;
+
 
 /**
  * AsynchronousPageStoreTest
@@ -155,31 +155,50 @@ public class AsynchronousPageStoreTest
        @Test
        public void storeReturnsSameInstanceOnClosePageRequest() throws 
InterruptedException
        {
+               final Semaphore semaphore = new Semaphore(0);
+               
+               IPageStore store = new NoopPageStore() {
+                       
+                       @Override
+                       public synchronized void addPage(IPageContext context, 
IManageablePage page)
+                       {
+                               try
+                               {
+                                       semaphore.acquire();
+                               }
+                               catch (InterruptedException e)
+                               {
+                               }
+                               
+                               super.addPage(context, page);
+                       }
+                       
+                       @Override
+                       public IManageablePage getPage(IPageContext context, 
int id)
+                       {
+                               fail();
+                               return null;
+                       }
+               };
 
-               ISerializer serializer = new 
DeflatedJavaSerializer("applicationKey");
-               // ISerializer serializer = new DummySerializer();
-
-               IDataStore dataStore = new DiskDataStore("applicationName", new 
File("./target"),
-                               Bytes.bytes(10000l));
-
-               // IPageStore pageStore = new DummyPageStore(new 
File("target/store"));
-               IPageStore pageStore = spy(new DefaultPageStore(serializer, 
dataStore, 0));
-
-               IPageStore asyncPageStore = new 
AsynchronousPageStore(pageStore, 100);
+               IPageStore asyncPageStore = new AsynchronousPageStore(store, 
100);
 
                int pageId = 0;
+               
                String sessionId = "sessionId";
+               
+               IPageContext context = new DummyPageContext(sessionId);
 
                DummyPage page = new DummyPage(pageId, 1000, 1000, sessionId);
-               asyncPageStore.storePage(sessionId, page);
-
-               Thread.sleep(500);
+               asyncPageStore.addPage(context, page);
 
-               IManageablePage pageBack = asyncPageStore.getPage(sessionId, 
pageId);
+               IManageablePage pageBack = asyncPageStore.getPage(context, 
pageId);
 
-               verify(pageStore, never()).getPage(sessionId, pageId);
+               semaphore.release();
 
                assertEquals(page, pageBack);
+               
+               store.destroy();
        }
 
        /**
@@ -191,31 +210,55 @@ public class AsynchronousPageStoreTest
        @Test
        public void storeReturnsRestoredInstanceOnDistantPageRequest() throws 
InterruptedException
        {
+               final Semaphore semaphore = new Semaphore(0);
+               
+               final AtomicBoolean got = new AtomicBoolean(false);
+               
+               IPageStore store = new MockPageStore() {
+                       
+                       @Override
+                       public synchronized void addPage(IPageContext context, 
IManageablePage page)
+                       {
+                               super.addPage(context, page);
+                               
+                               semaphore.release();
+                       }
+                       
+                       @Override
+                       public IManageablePage getPage(IPageContext context, 
int id)
+                       {
+                               got.set(true);
+                               
+                               return super.getPage(context, id);
+                       }
+               };
 
-               ISerializer serializer = new 
DeflatedJavaSerializer("applicationKey");
-               // ISerializer serializer = new DummySerializer();
-
-               IDataStore dataStore = new DiskDataStore("applicationName", new 
File("./target"),
-                               Bytes.bytes(10000l));
-
-               // IPageStore pageStore = new DummyPageStore(new 
File("target/store"));
-               IPageStore pageStore = spy(new DefaultPageStore(serializer, 
dataStore, 0));
-
-               IPageStore asyncPageStore = new 
AsynchronousPageStore(pageStore, 100);
+               IPageStore asyncPageStore = new AsynchronousPageStore(store, 
100);
 
                int pageId = 0;
+               
                String sessionId = "sessionId";
+               
+               IPageContext context = new DummyPageContext(sessionId);
 
                DummyPage page = new DummyPage(pageId, 1000, 1000, sessionId);
-               asyncPageStore.storePage(sessionId, page);
+               asyncPageStore.addPage(context, page);
 
-               Thread.sleep(1500);
+               try
+               {
+                       semaphore.acquire();
+               }
+               catch (InterruptedException e)
+               {
+               }
 
-               IManageablePage pageBack = asyncPageStore.getPage(sessionId, 
pageId);
+               IManageablePage pageBack = asyncPageStore.getPage(context, 
pageId);
 
-               verify(pageStore, times(1)).getPage(sessionId, pageId);
+               semaphore.release();
 
-               assertNotEquals(page, pageBack);
+               assertEquals(page, pageBack);
+               
+               store.destroy();
        }
 
        /**
@@ -315,18 +358,13 @@ public class AsynchronousPageStoreTest
                // ISerializer serializer = new DummySerializer();
                ISerializer serializer = new 
DeflatedJavaSerializer("applicationKey");
 
-               IDataStore dataStore = new DiskDataStore("applicationName", new 
File("./target"),
-                               Bytes.bytes(10000l));
-
-               // IPageStore pageStore = new DummyPageStore(new 
File("target/store")) {
-               IPageStore pageStore = new DefaultPageStore(serializer, 
dataStore, 0)
-               {
-
+               IPageStore pageStore = new DiskPageStore("applicationName", 
serializer, new File("./target"),
+                               Bytes.bytes(10000l)) {
                        @Override
-                       public void storePage(String sessionId, IManageablePage 
page)
+                       public void addPage(IPageContext context, 
IManageablePage page)
                        {
 
-                               super.storePage(sessionId, page);
+                               super.addPage(context, page);
 
                                lock.countDown();
                        }
@@ -341,20 +379,21 @@ public class AsynchronousPageStoreTest
                        for (int i = 1; i <= sessions; i++)
                        {
                                String sessionId = String.valueOf(i);
+                               IPageContext context = new 
DummyPageContext(sessionId);
                                Metrics metrics = new Metrics();
 
                                stopwatch.reset();
                                DummyPage page = new DummyPage(pageId, 
around(writeMillis), around(readMillis),
                                                sessionId);
                                stopwatch.start();
-                               asyncPageStore.storePage(sessionId, page);
+                               asyncPageStore.addPage(context, page);
                                metrics.storedPage = page;
                                metrics.storingMillis = 
stopwatch.elapsed(TimeUnit.MILLISECONDS);
 
                                stopwatch.reset();
                                stopwatch.start();
                                metrics.restoredPage = DummyPage.class
-                                               
.cast(asyncPageStore.getPage(sessionId, pageId));
+                                               
.cast(asyncPageStore.getPage(context, pageId));
                                metrics.restoringMillis = 
stopwatch.elapsed(TimeUnit.MILLISECONDS);
 
                                results.add(metrics);
@@ -363,6 +402,8 @@ public class AsynchronousPageStoreTest
 
                lock.await(pages * sessions * (writeMillis + readMillis), 
TimeUnit.MILLISECONDS);
 
+               pageStore.destroy();
+               
                return results;
        }
 

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/DefaultPageStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/DefaultPageStoreTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/DefaultPageStoreTest.java
deleted file mode 100644
index 2ffa376..0000000
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/DefaultPageStoreTest.java
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.wicket.pageStore;
-
-import org.apache.wicket.serialize.ISerializer;
-
-/**
- * Tests for DefaultPageStore
- */
-public class DefaultPageStoreTest extends AbstractPageStoreTest
-{
-       @Override
-       protected IPageStore createPageStore(ISerializer serializer, IDataStore 
dataStore, int maxEntries)
-       {
-               return new DefaultPageStore(serializer, dataStore, maxEntries);
-       }
-}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/DiskDataStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/DiskDataStoreTest.java 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/DiskDataStoreTest.java
index e69ead6..933870e 100644
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/DiskDataStoreTest.java
+++ 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/DiskDataStoreTest.java
@@ -16,6 +16,7 @@
  */
 package org.apache.wicket.pageStore;
 
+import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -26,6 +27,8 @@ import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import org.apache.wicket.page.IManageablePage;
+import org.apache.wicket.serialize.java.JavaSerializer;
 import org.apache.wicket.settings.StoreSettings;
 import org.apache.wicket.util.SlowTests;
 import org.apache.wicket.util.lang.Bytes;
@@ -36,6 +39,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
+ * Test for {@link DiskDataStore}.
  */
 @Category(SlowTests.class)
 public class DiskDataStoreTest extends Assert
@@ -59,20 +63,33 @@ public class DiskDataStoreTest extends Assert
        private static final int SLEEP_MAX = 10;
        private static final int THREAD_COUNT = 20;
        private static final int READ_MODULO = 100;
+       
+       private static final ConcurrentHashMap<String, IPageContext> contexts = 
new ConcurrentHashMap<>();
+       
+       private static IPageContext getContext(String sessionId) {
+               IPageContext context = new DummyPageContext();
+               
+               IPageContext existing = contexts.putIfAbsent(sessionId, 
context);
+               return existing != null ? existing : context;
+       }
 
-       private static class File
+       private static class TaskPage implements IManageablePage
        {
                private final String sessionId;
-               private final int id;
+               
+               private int id;
 
-               private byte first;
-               private byte last;
-               private int length;
+               private byte[] data;
 
-               public File(String sessionId, int id)
+               public TaskPage(String sessionId, int id)
                {
                        this.sessionId = sessionId;
+                       
                        this.id = id;
+
+                       int length = FILE_SIZE_MIN + 
random.nextInt(FILE_SIZE_MAX - FILE_SIZE_MIN);
+                       data = new byte[length];
+                       random.nextBytes(data);
                }
 
                public String getSessionId()
@@ -80,51 +97,54 @@ public class DiskDataStoreTest extends Assert
                        return sessionId;
                }
 
-               public int getId()
+               public boolean check(TaskPage other)
                {
-                       return id;
-               }
-
-               public byte[] generateData()
-               {
-                       length = FILE_SIZE_MIN + random.nextInt(FILE_SIZE_MAX - 
FILE_SIZE_MIN);
-                       byte data[] = new byte[length];
-                       random.nextBytes(data);
-                       first = data[0];
-                       last = data[data.length - 1];
-                       return data;
-               }
-
-               public boolean checkData(byte data[])
-               {
-                       if (data == null)
-                       {
-                               log.error("data[] should never be null");
-                               return false;
-                       }
-                       if (data.length != length)
+                       if (other.data.length != other.data.length)
                        {
                                log.error("data.length != length");
                                return false;
                        }
-                       if (first != data[0])
+                       if (other.id != other.id)
                        {
-                               log.error("first != data[0]");
+                               log.error("data.id != id");
                                return false;
                        }
-                       if (last != data[data.length - 1])
+                       if (other.sessionId != other.sessionId)
                        {
-                               log.error("last != data[data.length - 1]");
+                               log.error("data.sessionId != sessionId");
                                return false;
                        }
                        return true;
                }
+
+               @Override
+               public boolean isPageStateless()
+               {
+                       return false;
+               }
+
+               @Override
+               public int getPageId()
+               {
+                       return id;
+               }
+
+               @Override
+               public void detach()
+               {
+               }
+
+               @Override
+               public boolean setFreezePageId(boolean freeze)
+               {
+                       return false;
+               }
        }
 
        private final Map<String, AtomicInteger> sessionCounter = new 
ConcurrentHashMap<String, AtomicInteger>();
-       private final ConcurrentLinkedQueue<File> filesToSave = new 
ConcurrentLinkedQueue<File>();
-       private final ConcurrentLinkedQueue<File> filesToRead1 = new 
ConcurrentLinkedQueue<File>();
-       private final ConcurrentLinkedQueue<File> filesToRead2 = new 
ConcurrentLinkedQueue<File>();
+       private final ConcurrentLinkedQueue<TaskPage> pagesToSave = new 
ConcurrentLinkedQueue<TaskPage>();
+       private final ConcurrentLinkedQueue<TaskPage> filesToRead1 = new 
ConcurrentLinkedQueue<TaskPage>();
+       private final ConcurrentLinkedQueue<TaskPage> filesToRead2 = new 
ConcurrentLinkedQueue<TaskPage>();
 
        private final AtomicInteger read1Count = new AtomicInteger(0);
        private final AtomicInteger read2Count = new AtomicInteger(0);
@@ -164,15 +184,15 @@ public class DiskDataStoreTest extends Assert
                for (int i = 0; i < FILES_COUNT; ++i)
                {
                        String session = randomSessionId();
-                       File file = new File(session, nextSessionId(session));
+                       TaskPage file = new TaskPage(session, 
nextSessionId(session));
                        long now = System.nanoTime();
-                       filesToSave.add(file);
+                       pagesToSave.add(file);
                        long duration = System.nanoTime() - now;
                        saveTime.addAndGet((int)duration);
                }
        }
 
-       private IDataStore dataStore;
+       private IPageStore pageStore;
 
        /**
         * Stores RuntimeException into a field.
@@ -205,21 +225,20 @@ public class DiskDataStoreTest extends Assert
                @Override
                protected void doRun()
                {
-                       File file;
+                       TaskPage page;
 
-                       while ((file = filesToSave.poll()) != null || 
saveCount.get() < FILES_COUNT)
+                       while ((page = pagesToSave.poll()) != null || 
saveCount.get() < FILES_COUNT)
                        {
-                               if (file != null)
+                               if (page != null)
                                {
-                                       byte data[] = file.generateData();
-                                       
dataStore.storeData(file.getSessionId(), file.getId(), data);
+                                       
pageStore.addPage(getContext(page.getSessionId()), page);
 
                                        if (saveCount.get() % READ_MODULO == 0)
                                        {
-                                               filesToRead1.add(file);
+                                               filesToRead1.add(page);
                                        }
                                        saveCount.incrementAndGet();
-                                       bytesWritten.addAndGet(data.length);
+                                       
bytesWritten.addAndGet(page.data.length);
                                }
 
                                try
@@ -242,20 +261,20 @@ public class DiskDataStoreTest extends Assert
                @Override
                protected void doRun()
                {
-                       File file;
-                       while ((file = filesToRead1.poll()) != null || 
!saveDone.get())
+                       TaskPage page;
+                       while ((page = filesToRead1.poll()) != null || 
!saveDone.get())
                        {
-                               if (file != null)
+                               if (page != null)
                                {
-                                       byte bytes[] = 
dataStore.getData(file.getSessionId(), file.getId());
-                                       if (file.checkData(bytes) == false)
+                                       TaskPage other = 
(TaskPage)pageStore.getPage(getContext(page.getSessionId()), page.getPageId());
+                                       if (page.check(other) == false)
                                        {
                                                failures.incrementAndGet();
                                                log.error("Detected error 
number: " + failures.get());
                                        }
-                                       filesToRead2.add(file);
+                                       filesToRead2.add(page);
                                        read1Count.incrementAndGet();
-                                       bytesRead.addAndGet(bytes.length);
+                                       bytesRead.addAndGet(other.data.length);
                                }
 
                                try
@@ -277,19 +296,19 @@ public class DiskDataStoreTest extends Assert
                @Override
                protected void doRun()
                {
-                       File file;
-                       while ((file = filesToRead2.poll()) != null || 
!read1Done.get())
+                       TaskPage page;
+                       while ((page = filesToRead2.poll()) != null || 
!read1Done.get())
                        {
-                               if (file != null)
+                               if (page != null)
                                {
-                                       byte bytes[] = 
dataStore.getData(file.getSessionId(), file.getId());
-                                       if (file.checkData(bytes) == false)
+                                       TaskPage other = 
(TaskPage)pageStore.getPage(getContext(page.getSessionId()), page.getPageId());
+                                       if (page.check(other) == false)
                                        {
                                                failures.incrementAndGet();
                                                log.error("Detected error 
number: " + failures.get());
                                        }
                                        read2Count.incrementAndGet();
-                                       bytesRead.addAndGet(bytes.length);
+                                       bytesRead.addAndGet(other.data.length);
                                }
 
                                try
@@ -356,7 +375,7 @@ public class DiskDataStoreTest extends Assert
 
                for (String s : sessionCounter.keySet())
                {
-                       dataStore.removeData(s);
+                       pageStore.removeAllPages(getContext(s));
                }
        }
 
@@ -369,15 +388,15 @@ public class DiskDataStoreTest extends Assert
                generateFiles();
 
                StoreSettings storeSettings = new StoreSettings(null);
-               java.io.File fileStoreFolder = 
storeSettings.getFileStoreFolder();
-
-               dataStore = new DiskDataStore("app1", fileStoreFolder, 
MAX_SIZE_PER_SESSION);
+               File fileStoreFolder = storeSettings.getFileStoreFolder();
                int asynchronousQueueCapacity = 
storeSettings.getAsynchronousQueueCapacity();
-               dataStore = new AsynchronousDataStore(dataStore, 
asynchronousQueueCapacity);
+
+               pageStore = new DiskPageStore("app1", new 
JavaSerializer("app1"), fileStoreFolder, MAX_SIZE_PER_SESSION);
+               pageStore = new AsynchronousPageStore(pageStore, 
asynchronousQueueCapacity);
 
                doTestDataStore();
 
-               dataStore.destroy();
+               pageStore.destroy();
        }
 
        /**
@@ -391,7 +410,7 @@ public class DiskDataStoreTest extends Assert
        {
                StoreSettings storeSettings = new StoreSettings(null);
                java.io.File fileStoreFolder = 
storeSettings.getFileStoreFolder();
-               DiskDataStore store = new DiskDataStore("sessionFolderName", 
fileStoreFolder, MAX_SIZE_PER_SESSION);
+               DiskPageStore store = new DiskPageStore("sessionFolderName", 
new JavaSerializer("sessionFolderName"), fileStoreFolder, MAX_SIZE_PER_SESSION);
 
                String sessionId = "abcdefg";
                java.io.File sessionFolder = store.getSessionFolder(sessionId, 
true);
@@ -401,7 +420,7 @@ public class DiskDataStoreTest extends Assert
                assertTrue(absolutePath.contains("1279"));
                assertTrue(absolutePath.contains("abcdefg"));
 
-               DiskDataStore.SessionEntry sessionEntry = new 
DiskDataStore.SessionEntry(store, sessionId);
+               DiskPageStore.DiskData sessionEntry = new 
DiskPageStore.DiskData(store, sessionId);
                sessionEntry.unbind();
                // assert that the 'sessionId' folder and the parents two 
levels up are removed
                
assertFalse(sessionFolder.getParentFile().getParentFile().exists());

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/DummyPageContext.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/DummyPageContext.java 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/DummyPageContext.java
new file mode 100644
index 0000000..0cd0b08
--- /dev/null
+++ 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/DummyPageContext.java
@@ -0,0 +1,103 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.wicket.pageStore;
+
+import java.io.Serializable;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.wicket.MetaDataEntry;
+import org.apache.wicket.MetaDataKey;
+import org.apache.wicket.pageStore.IPageContext;
+
+/**
+ * Dummy implementation of a page context - suitable for a single session only.
+ */
+public class DummyPageContext implements IPageContext
+{
+
+       final String sessionId;
+
+       MetaDataEntry<?>[] requestData;
+       
+       MetaDataEntry<?>[] sessionData;
+
+       Map<String, Object> sessionAttributes = new HashMap<>();
+
+       public DummyPageContext()
+       {
+               this("dummy_id");
+       }
+
+       public DummyPageContext(String sessionId)
+       {
+               this.sessionId = sessionId;
+       }
+
+       @Override
+       public <T> void setRequestData(MetaDataKey<T> key, T value)
+       {
+               requestData = key.set(requestData, value);
+       }
+
+       @Override
+       public <T> T getRequestData(MetaDataKey<T> key)
+       {
+               return key.get(requestData);
+       }
+
+       @Override
+       public <T extends Serializable> void setSessionAttribute(String key, T 
value)
+       {
+               sessionAttributes.put(key, value);
+       }
+       
+       @SuppressWarnings("unchecked")
+       @Override
+       public <T extends Serializable> T getSessionAttribute(String key)
+       {
+               return (T)sessionAttributes.get(key);
+       }
+       
+       @Override
+       public <T extends Serializable> void setSessionData(MetaDataKey<T> key, 
T value)
+       {
+               sessionData = key.set(sessionData, value);
+       }
+
+       @Override
+       public <T extends Serializable> T getSessionData(MetaDataKey<T> key)
+       {
+               return key.get(sessionData);
+       }
+
+       @Override
+       public void bind()
+       {
+       }
+
+       @Override
+       public String getSessionId()
+       {
+               return sessionId;
+       }
+
+       public void clearRequest()
+       {
+               requestData = null;
+       }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/GroupingPageStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/GroupingPageStoreTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/GroupingPageStoreTest.java
new file mode 100644
index 0000000..b863074
--- /dev/null
+++ 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/GroupingPageStoreTest.java
@@ -0,0 +1,112 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.wicket.pageStore;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.io.Serializable;
+
+import org.apache.wicket.MetaDataKey;
+import org.apache.wicket.MockPage;
+import org.apache.wicket.mock.MockPageStore;
+import org.apache.wicket.page.IManageablePage;
+import org.junit.Test;
+
+/**
+ * Test for {@link GroupingPageStore}.
+ * 
+ * @author svenmeier
+ */
+public class GroupingPageStoreTest
+{
+
+       private static MetaDataKey<Serializable> KEY = new 
MetaDataKey<Serializable>()
+       {
+       }; 
+       
+       private static Serializable VALUE = new Serializable()
+       {
+       };
+
+       @Test
+       public void test()
+       {
+               String sessionId = "foo";
+               
+               IPageStore store = new MockPageStore() {
+                       
+                       public void addPage(IPageContext context, 
IManageablePage page) {
+
+                               context.setSessionAttribute("attribute", 
"value");
+                               context.setSessionData(KEY, VALUE);
+
+                               assertEquals(sessionId + "_" + group(page), 
context.getSessionId());
+                               
+                               super.addPage(context, page);
+                       }
+                       
+                       @Override
+                       public void removeAllPages(IPageContext context)
+                       {
+                               assertEquals(sessionId + "_group0", 
context.getSessionId());
+                               
+                               super.removeAllPages(context);
+                       }
+               };
+               
+               IPageStore groupingStore = new GroupingPageStore(store, 2) {
+                       @Override
+                       protected String getGroup(IManageablePage page)
+                       {
+                               return group(page);
+                       }
+               };
+               
+               DummyPageContext context = new DummyPageContext(sessionId) {
+                       @Override
+                       public <T extends Serializable> void 
setSessionData(MetaDataKey<T> key, T value)
+                       {
+                               assertFalse("session not set directly in 
session", value == VALUE);
+                               
+                               super.setSessionData(key, value);
+                       }
+                       
+                       @Override
+                       public <T extends Serializable> void 
setSessionAttribute(String key, T value)
+                       {
+                               assertTrue("key starts with group", 
key.startsWith("attribute_group"));
+                               
+                               super.setSessionAttribute(key, value);
+                       }
+               };
+               
+               groupingStore.addPage(context, new MockPage(0));
+               groupingStore.addPage(context, new MockPage(1));
+               groupingStore.addPage(context, new MockPage(10));
+               groupingStore.addPage(context, new MockPage(11));
+               groupingStore.addPage(context, new MockPage(2));
+               groupingStore.addPage(context, new MockPage(21));
+               
+       }
+
+       protected String group(IManageablePage page)
+       {
+               return "group" + page.getPageId() / 10;
+       }
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/InMemoryPageStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/InMemoryPageStoreTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/InMemoryPageStoreTest.java
new file mode 100644
index 0000000..ab1dcec
--- /dev/null
+++ 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/InMemoryPageStoreTest.java
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.wicket.pageStore;
+
+import org.apache.wicket.serialize.ISerializer;
+
+/**
+ * Tests for {@link InMemoryPageStore}
+ */
+public class InMemoryPageStoreTest extends AbstractPageStoreTest
+{
+       @Override
+       protected IPageStore createPageStore(ISerializer serializer, int 
maxEntries)
+       {
+               return new InMemoryPageStore("test", maxEntries);
+       }
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/InSessionPageStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/InSessionPageStoreTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/InSessionPageStoreTest.java
new file mode 100644
index 0000000..4fa2f4e
--- /dev/null
+++ 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/InSessionPageStoreTest.java
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.wicket.pageStore;
+
+import org.apache.wicket.serialize.ISerializer;
+
+/**
+ * Test for {@link InSessionPageStore}. 
+ */
+public class InSessionPageStoreTest extends AbstractPageStoreTest
+{
+       @Override
+       protected IPageStore createPageStore(ISerializer serializer, int 
maxEntries)
+       {
+               return new InSessionPageStore(new NoopPageStore(), serializer, 
maxEntries);
+       }
+
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/NoopDataStore.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/NoopDataStore.java 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/NoopDataStore.java
deleted file mode 100644
index 0cadaee..0000000
--- a/wicket-core/src/test/java/org/apache/wicket/pageStore/NoopDataStore.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.wicket.pageStore;
-
-/**
- * An implementation of IDataStore that does nothing
- */
-public class NoopDataStore implements IDataStore
-{
-       @Override
-       public byte[] getData(String sessionId, int id)
-       {
-               return null;
-       }
-
-       @Override
-       public void removeData(String sessionId, int id)
-       {
-       }
-
-       @Override
-       public void removeData(String sessionId)
-       {
-       }
-
-       @Override
-       public void storeData(String sessionId, int id, byte[] data)
-       {
-       }
-
-       @Override
-       public void destroy()
-       {
-       }
-
-       @Override
-       public boolean isReplicated()
-       {
-               return false;
-       }
-
-       @Override
-       public boolean canBeAsynchronous()
-       {
-               return false;
-       }
-}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/PerSessionPageStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/PerSessionPageStoreTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/PerSessionPageStoreTest.java
deleted file mode 100644
index 0cd4a2a..0000000
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/PerSessionPageStoreTest.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.wicket.pageStore;
-
-import org.apache.wicket.MockPage;
-import org.apache.wicket.serialize.ISerializer;
-import org.junit.Test;
-
-/**
- * Tests for PerSessionPageStore
- */
-public class PerSessionPageStoreTest extends AbstractPageStoreTest
-{
-       @Override
-       protected IPageStore createPageStore(ISerializer serializer, IDataStore 
dataStore, int maxEntries)
-       {
-               return new PerSessionPageStore(serializer, dataStore, 
maxEntries);
-       }
-
-       /**
-        * Verify that it is OK to store more pages than {@code maxEntries}
-        * if they are in different sessions
-        */
-       @Test
-       @Override
-       public void maxSizeDifferentSessions()
-       {
-               String sessionId2 = "0987654321";
-
-               pageStore.storePage(sessionId, new MockPage(pageId));
-
-               assertNotNull(pageStore.getPage(sessionId, pageId));
-
-               pageStore.storePage(sessionId2, new MockPage(pageId));
-
-               assertNotNull(pageStore.getPage(sessionId, pageId));
-               assertNotNull(pageStore.getPage(sessionId2, pageId));
-       }
-}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/disk/PageWindowManagerTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/disk/PageWindowManagerTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/disk/PageWindowManagerTest.java
new file mode 100644
index 0000000..57ce54d
--- /dev/null
+++ 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/disk/PageWindowManagerTest.java
@@ -0,0 +1,303 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.wicket.pageStore.disk;
+
+import java.security.SecureRandom;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import org.apache.wicket.markup.html.WebPage;
+import org.apache.wicket.pageStore.disk.PageWindowManager.FileWindow;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test for {@link PageWindowManager}.
+ * 
+ * @author Matej Knopp
+ */
+public class PageWindowManagerTest extends Assert
+{
+       /**
+        * https://issues.apache.org/jira/browse/WICKET-4572
+        */
+       @Test
+       public void removeObsoleteIndices()
+       {
+               int page0id = 0,
+                       page1id = 1,
+                       page2id = 2;
+               int maxSize = 10;
+
+               PageWindowManager manager = new PageWindowManager(maxSize);
+
+               // Add few pages.
+               // All of them fully occupy the max space in the 
pageWindowManager.
+               // So adding N+1st page removes the Nth page.
+               manager.createPageWindow(page0id, WebPage.class, maxSize);
+               FileWindow page0Window = manager.getPageWindow(page0id);
+               assertWindow(page0Window, page0id, 
page0Window.getFilePartOffset(), page0Window.getFilePartSize());
+
+               manager.createPageWindow(page1id, WebPage.class, maxSize);
+               FileWindow page1Window = manager.getPageWindow(page1id);
+               assertWindow(page1Window, page1id, 
page1Window.getFilePartOffset(), page1Window.getFilePartSize());
+
+               // Try to get a page which has been lost with the adding of 
page1
+               assertNull("Page0 must be lost when Page1 has been added.", 
manager.getPageWindow(page0id));
+
+               manager.createPageWindow(page2id, WebPage.class, maxSize);
+               FileWindow page2Window = manager.getPageWindow(page2id);
+               assertWindow(page2Window, page2id, 
page2Window.getFilePartOffset(), page2Window.getFilePartSize());
+
+               // Try to get a page which has been lost with the adding of 
page2
+               assertNull("Page1 must be lost when Page2 has been added.", 
manager.getPageWindow(page1id));
+       }
+
+       /**
+        * 
+        */
+       @Test
+       public void addRemove()
+       {
+               PageWindowManager manager = new PageWindowManager(300);
+               FileWindow window;
+
+               window = manager.createPageWindow(1, WebPage.class, 50);
+               assertWindow(window, 1, 0, 50);
+
+               window = manager.createPageWindow(2, WebPage.class, 40);
+               assertWindow(window, 2, 50, 40);
+
+               assertEquals(manager.getTotalSize(), 90);
+
+               window = manager.createPageWindow(2, WebPage.class, 30);
+               assertWindow(window, 2, 50, 30);
+               assertEquals(manager.getTotalSize(), 80);
+
+               manager.removePage(2);
+               assertEquals(manager.getTotalSize(), 50);
+
+               window = manager.createPageWindow(3, WebPage.class, 30);
+               assertWindow(window, 3, 50, 30);
+               assertEquals(manager.getTotalSize(), 80);
+       }
+
+       /**
+        * 
+        */
+       @Test
+       public void pageWindowCycle()
+       {
+               PageWindowManager manager = new PageWindowManager(100);
+               FileWindow window;
+
+               window = manager.createPageWindow(1, WebPage.class, 30);
+
+               window = manager.createPageWindow(2, WebPage.class, 30);
+
+               window = manager.createPageWindow(3, WebPage.class, 30);
+
+               assertWindow(window, 3, 60, 30);
+
+               window = manager.createPageWindow(4, WebPage.class, 30);
+
+               assertWindow(window, 4, 90, 30);
+
+               // should start at the beginging
+
+               window = manager.createPageWindow(5, WebPage.class, 20);
+
+               assertWindow(window, 5, 0, 20);
+
+               assertNull(manager.getPageWindow(1));
+
+               window = manager.getPageWindow(2);
+               assertWindow(window, 2, 30, 30);
+
+               window = manager.createPageWindow(6, WebPage.class, 10);
+
+               assertWindow(window, 6, 20, 10);
+
+               window = manager.getPageWindow(2);
+               assertWindow(window, 2, 30, 30);
+
+               window = manager.createPageWindow(6, WebPage.class, 30);
+               assertWindow(window, 6, 20, 30);
+
+               assertNull(manager.getPageWindow(2));
+               assertNotNull(manager.getPageWindow(3));
+
+               window = manager.createPageWindow(6, WebPage.class, 60);
+               assertWindow(window, 6, 20, 60);
+
+               assertNull(manager.getPageWindow(3));
+
+               window = manager.createPageWindow(7, WebPage.class, 20);
+               assertWindow(window, 7, 80, 20);
+
+               assertNotNull(manager.getPageWindow(7));
+
+               // should start at the beginning again
+
+               window = manager.createPageWindow(8, WebPage.class, 10);
+               assertWindow(window, 8, 0, 10);
+
+               assertNull(manager.getPageWindow(5));
+               assertNotNull(manager.getPageWindow(6));
+
+               window = manager.createPageWindow(9, WebPage.class, 20);
+               assertWindow(window, 9, 10, 20);
+
+               assertNull(manager.getPageWindow(6));
+               assertNotNull(manager.getPageWindow(7));
+
+               window = manager.createPageWindow(10, WebPage.class, 20);
+               assertWindow(window, 10, 30, 20);
+
+               assertNull(manager.getPageWindow(6));
+               assertNotNull(manager.getPageWindow(7));
+
+               // make sure when replacing a page that's not last the old 
"instance" is
+               // not valid anymore
+
+               manager.createPageWindow(8, WebPage.class, 10);
+
+               window = manager.getPageWindow(8);
+               assertWindow(window, 8, 50, 10);
+       }
+
+
+       private void assertWindow(FileWindow window, int pageId, int 
filePartOffset, int filePartSize)
+       {
+               assertTrue(window.getPageId() == pageId && 
window.getFilePartOffset() == filePartOffset &&
+                       window.getFilePartSize() == filePartSize);
+       }
+
+       /** how many operations to execute */
+       private static final int EXECUTIONS = 10000;
+
+       /** used to wait the executions */
+       private static final CountDownLatch LATCH = new 
CountDownLatch(EXECUTIONS);
+
+       private final PageWindowManager pageWindowManager = new 
PageWindowManager(1000L);
+
+       /** the execution types */
+       private final Runnable[] TASKS = new Runnable[]
+       {
+               new CreatePageWindowTask(pageWindowManager),
+               new GetPageWindowTask(pageWindowManager),
+               new RemovePageInSessionTask(pageWindowManager)
+       };
+
+       private static final SecureRandom RND = new SecureRandom();
+
+       /**
+        * Executes random mutator and accessor operations on {@link 
org.apache.wicket.pageStore.AsynchronousDataStore} validating
+        * that the used data structures can be used simultaneously.
+        *
+        * @throws Exception
+        */
+       @Test
+       public void randomOperations() throws Exception
+       {
+               ExecutorService executorService = 
Executors.newFixedThreadPool(50);
+
+               for (int i = 0; i < EXECUTIONS; i++)
+               {
+                       Runnable task = TASKS[RND.nextInt(TASKS.length)];
+                       executorService.submit(task);
+               }
+               LATCH.await();
+               executorService.shutdown();
+       }
+
+       private static abstract class AbstractTask implements Runnable
+       {
+               /** the ids for the stored/removed pages */
+               private static final int[] PAGE_IDS = new int[] { 1, 2, 3, 4, 
5, 6, 7, 8, 9, 10 };
+
+               protected final PageWindowManager pageWindowManager;
+
+               private AbstractTask(PageWindowManager pageWindowManager)
+               {
+                       this.pageWindowManager = pageWindowManager;
+               }
+
+               protected abstract void r();
+
+               @Override
+               public void run()
+               {
+                       try
+                       {
+                               r();
+                       }
+                       finally
+                       {
+                               LATCH.countDown();
+                       }
+               }
+
+               protected int getPageId()
+               {
+                       return PAGE_IDS[RND.nextInt(PAGE_IDS.length)];
+               }
+       }
+
+       private static class CreatePageWindowTask extends AbstractTask
+       {
+               private CreatePageWindowTask(PageWindowManager 
pageWindowManager)
+               {
+                       super(pageWindowManager);
+               }
+
+               @Override
+               public void r()
+               {
+                       pageWindowManager.createPageWindow(getPageId(), 
WebPage.class, 1000);
+               }
+       }
+
+       private static class GetPageWindowTask extends AbstractTask
+       {
+               private GetPageWindowTask(PageWindowManager pageWindowManager)
+               {
+                       super(pageWindowManager);
+               }
+
+               @Override
+               public void r()
+               {
+                       pageWindowManager.getPageWindow(getPageId());
+               }
+       }
+
+       private static class RemovePageInSessionTask extends AbstractTask
+       {
+               private RemovePageInSessionTask(PageWindowManager 
pageWindowManager)
+               {
+                       super(pageWindowManager);
+               }
+
+               @Override
+               public void r()
+               {
+                       pageWindowManager.removePage(getPageId());
+               }
+       }
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/DummyPageManagerContext.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/DummyPageManagerContext.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/DummyPageManagerContext.java
deleted file mode 100644
index 99d4c90..0000000
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/DummyPageManagerContext.java
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.wicket.pageStore.memory;
-
-import java.io.Serializable;
-
-import org.apache.wicket.page.IPageManagerContext;
-
-/**
- */
-public class DummyPageManagerContext implements IPageManagerContext
-{
-
-       Serializable attribute = null;
-       Object requestData;
-
-       @Override
-       public void setRequestData(Object data)
-       {
-               requestData = data;
-       }
-
-       @Override
-       public Object getRequestData()
-       {
-               return requestData;
-       }
-
-       @Override
-       public void setSessionAttribute(String key, Serializable value)
-       {
-               attribute = value;
-       }
-
-       @Override
-       public Serializable getSessionAttribute(String key)
-       {
-               return attribute;
-       }
-
-       @Override
-       public void bind()
-       {
-       }
-
-       @Override
-       public String getSessionId()
-       {
-               return "dummy_id";
-       }
-
-}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/HttpSessionDataStoreTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/HttpSessionDataStoreTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/HttpSessionDataStoreTest.java
deleted file mode 100644
index 10b5268..0000000
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/HttpSessionDataStoreTest.java
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.wicket.pageStore.memory;
-
-import static org.junit.Assert.assertArrayEquals;
-
-import org.apache.wicket.util.tester.WicketTestCase;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-/**
- */
-public class HttpSessionDataStoreTest extends WicketTestCase
-{
-       final String sessionId = "anything";
-
-       final int pageId = 1;
-
-       final byte[] PAGE1 = new byte[] { 1 };
-       final byte[] PAGE2 = new byte[] { 2 };
-
-       HttpSessionDataStore store;
-
-       /**
-        * before()
-        */
-       @Before
-       public void before()
-       {
-               store = new HttpSessionDataStore(new DummyPageManagerContext(), 
new NoopEvictionStrategy());
-       }
-
-       /**
-        * after()
-        */
-       @After
-       public void after()
-       {
-               store.destroy();
-       }
-
-       /**
-        * storePage()
-        */
-       @Test
-       public void storePage()
-       {
-               assertNull(store.getData(sessionId, pageId));
-
-               store.storeData(sessionId, pageId, PAGE1);
-               assertArrayEquals(PAGE1, store.getData(sessionId, pageId));
-       }
-
-       /**
-        * removePage1()
-        */
-       @Test
-       public void removePage1()
-       {
-               assertNull(store.getData(sessionId, pageId));
-
-               store.storeData(sessionId, pageId, PAGE1);
-
-               assertNotNull(store.getData(sessionId, pageId));
-
-               store.removeData(sessionId, pageId);
-
-               assertNull(store.getData(sessionId, pageId));
-       }
-
-       /**
-        * removePage2()
-        */
-       @Test
-       public void removePage2()
-       {
-               assertNull(store.getData(sessionId, pageId));
-
-               store.storeData(sessionId, pageId, PAGE1);
-
-               assertNotNull(store.getData(sessionId, pageId));
-
-               store.removeData(sessionId);
-
-               assertNull(store.getData(sessionId, pageId));
-       }
-
-
-       private static final class NoopEvictionStrategy implements 
IDataStoreEvictionStrategy
-       {
-
-               @Override
-               public void evict(PageTable pageTable)
-               {
-               }
-       }
-}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/MemorySizeEvictionStrategyTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/MemorySizeEvictionStrategyTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/MemorySizeEvictionStrategyTest.java
deleted file mode 100644
index 50033fa..0000000
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/MemorySizeEvictionStrategyTest.java
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.wicket.pageStore.memory;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
-import org.apache.wicket.util.lang.Bytes;
-import org.apache.wicket.core.util.lang.WicketObjects;
-import org.junit.Test;
-
-/***/
-public class MemorySizeEvictionStrategyTest
-{
-       final byte[] PAGE1 = new byte[] { 1 };
-       final byte[] PAGE2 = new byte[] { 2, 3 };
-
-       /***/
-       @Test
-       public void evict()
-       {
-               PageTable pageTable = new PageTable();
-
-               long sizeOfEmptyPageTable = WicketObjects.sizeof(pageTable);
-
-               // evict to empty page table
-               MemorySizeEvictionStrategy strategy = new 
MemorySizeEvictionStrategy(
-                       Bytes.bytes(sizeOfEmptyPageTable));
-               pageTable.storePage(PAGE1.length, PAGE1);
-               assertEquals(1, pageTable.size());
-               strategy.evict(pageTable);
-               assertEquals(0, pageTable.size());
-               long currentSize = WicketObjects.sizeof(pageTable);
-               assertTrue("Current size: |" + currentSize + "|, strategy size: 
|" + sizeOfEmptyPageTable +
-                       "|", currentSize <= sizeOfEmptyPageTable);
-
-               // evict to page table with size: empty + PAGE2
-               pageTable.storePage(PAGE2.length, PAGE2);
-               long sizeOfWithPage2 = WicketObjects.sizeof(pageTable);
-               strategy = new 
MemorySizeEvictionStrategy(Bytes.bytes(sizeOfWithPage2));
-               pageTable.storePage(PAGE1.length, PAGE1);
-               assertEquals(2, pageTable.size());
-               strategy.evict(pageTable);
-               // the following assertion depends on the fact that PAGE2 has
-               // bigger size than PAGE1
-               assertEquals(1, pageTable.size());
-               currentSize = WicketObjects.sizeof(pageTable);
-               assertTrue("Current size: |" + currentSize + "|, strategy size: 
|" + sizeOfWithPage2 + "|",
-                       currentSize <= sizeOfWithPage2);
-       }
-}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/PageNumberEvictionStrategyTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/PageNumberEvictionStrategyTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/PageNumberEvictionStrategyTest.java
deleted file mode 100644
index d3bf35b..0000000
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/PageNumberEvictionStrategyTest.java
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.wicket.pageStore.memory;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-
-import org.junit.Test;
-
-/***/
-public class PageNumberEvictionStrategyTest
-{
-
-       final byte[] PAGE1 = new byte[] { 1 };
-       final byte[] PAGE2 = new byte[] { 2, 3 };
-
-       /***/
-       @Test
-       public void evict()
-       {
-               // evict to page table with one page only
-               PageNumberEvictionStrategy strategy = new 
PageNumberEvictionStrategy(1);
-
-               PageTable pageTable = new PageTable();
-
-               pageTable.storePage(PAGE1.length, PAGE1);
-               assertEquals(1, pageTable.size());
-               strategy.evict(pageTable);
-               assertEquals(1, pageTable.size());
-               assertNotNull(pageTable.getPage(PAGE1.length));
-
-               pageTable.storePage(PAGE2.length, PAGE2);
-               assertEquals(2, pageTable.size());
-               strategy.evict(pageTable);
-               assertEquals(1, pageTable.size());
-               assertNotNull(pageTable.getPage(PAGE2.length));
-               assertNull(pageTable.getPage(PAGE1.length));
-       }
-
-       /**
-        * The number of pages must be at least '1'
-        */
-       @Test(expected = IllegalArgumentException.class)
-       public void greaterThanZero()
-       {
-               new PageNumberEvictionStrategy(0);
-       }
-}

http://git-wip-us.apache.org/repos/asf/wicket/blob/bcf76f51/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/PageTableTest.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/PageTableTest.java
 
b/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/PageTableTest.java
deleted file mode 100644
index 062068f..0000000
--- 
a/wicket-core/src/test/java/org/apache/wicket/pageStore/memory/PageTableTest.java
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 org.apache.wicket.pageStore.memory;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNull;
-
-import org.junit.Test;
-
-/***/
-public class PageTableTest
-{
-
-       final byte[] data = new byte[] { 1 };
-
-       /***/
-       @Test
-       public void getOldest()
-       {
-               PageTable pageTable = new PageTable();
-
-               assertNull(pageTable.getOldest());
-
-               pageTable.storePage(1, data);
-               // index: 1
-               assertEquals(Integer.valueOf(1), pageTable.getOldest());
-
-               pageTable.storePage(2, data);
-               // index: 2, 1
-               assertEquals(Integer.valueOf(1), pageTable.getOldest());
-
-               pageTable.storePage(3, data);
-               // index: 3, 2, 1
-               assertEquals(Integer.valueOf(1), pageTable.getOldest());
-
-               pageTable.getPage(1);
-               // index: 1, 3, 2
-               assertEquals(Integer.valueOf(2), pageTable.getOldest());
-
-               pageTable.removePage(2);
-               // index: 1, 3
-               assertEquals(Integer.valueOf(3), pageTable.getOldest());
-       }
-}

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