// Copyright 2006 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.apache.tapestry.internal.services;
import static org.apache.tapestry.ioc.internal.util.CollectionFactory.newMap;
import java.util.Map;
import org.apache.tapestry.internal.structure.Page;
import org.apache.tapestry.ioc.services.ThreadCleanupListener;
import org.apache.tapestry.services.ComponentClassResolver;
public class RequestPageCacheImpl implements RequestPageCache, ThreadCleanupListener
{
private final ComponentClassResolver _resolver;
private final PagePool _pagePool;
/**
* Keyed on fully qualified page class name.
*/
private final Map<String, Page> _cache = newMap();
public RequestPageCacheImpl(ComponentClassResolver resolver, PagePool pagePool)
{
_resolver = resolver;
_pagePool = pagePool;
}
public Page get(String pageName)
{
String className = _resolver.resolvePageNameToClassName(pageName);
if (className == null)
throw new IllegalArgumentException(ServicesMessages.pageDoesNotExist(pageName));
return getByClassName(className);
}
public Page getByClassName(String className)
{
Page page = _cache.get(className);
if (page == null)
{
page = _pagePool.checkout(className);
page.attached();
_cache.put(className, page);
}
return page;
}
public void threadDidCleanup()
{
for (Page p : _cache.values())
_pagePool.release(p);
}
}