    001// Copyright 2006, 2007, 2008, 2009, 2010, 2011 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007// http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.internal.services;
    016
    017import org.apache.tapestry5.beanmodel.services.*;
    018import org.apache.tapestry5.http.services.Request;
    019import org.apache.tapestry5.internal.InternalConstants;
    020import org.apache.tapestry5.internal.structure.Page;
    021import org.apache.tapestry5.ioc.annotations.Primary;
    022import org.apache.tapestry5.services.ComponentEventResultProcessor;
    023import org.apache.tapestry5.services.PageRenderRequestHandler;
    024import org.apache.tapestry5.services.PageRenderRequestParameters;
    025import org.apache.tapestry5.services.Traditional;
    026
    027import java.io.IOException;
    028
    029/**
    030 * Handles a page render request by activating and then rendering the page.
    031 *
    032 * @see org.apache.tapestry5.internal.services.PageRenderDispatcher
    033 */
    034@SuppressWarnings("unchecked")
    035public class PageRenderRequestHandlerImpl implements PageRenderRequestHandler
    036{
    037    private final RequestPageCache cache;
    038
    039    private final ComponentEventResultProcessor resultProcessor;
    040
    041    private final PageResponseRenderer pageResponseRenderer;
    042
    043    private final PageActivator pageActivator;
    044
    045    private final Request request;
    046
    047    public PageRenderRequestHandlerImpl(RequestPageCache cache, @Traditional
    048    @Primary
    049    ComponentEventResultProcessor resultProcessor, PageResponseRenderer pageResponseRenderer,
    050                                        PageActivator pageActivator, Request request)
    051    {
    052        this.cache = cache;
    053        this.resultProcessor = resultProcessor;
    054        this.pageResponseRenderer = pageResponseRenderer;
    055        this.pageActivator = pageActivator;
    056        this.request = request;
    057    }
    058
    059    public void handle(PageRenderRequestParameters parameters) throws IOException
    060    {
    061        Page page = cache.get(parameters.getLogicalPageName());
    062
    063        if (request.getAttribute(InternalConstants.BYPASS_ACTIVATION) == null)
    064        {
    065            if (pageActivator.activatePage(page.getRootElement().getComponentResources(),
    066                    parameters.getActivationContext(), resultProcessor))
    067            {
    068                return;
    069            }
    070
    071            if (!parameters.isLoopback())
    072            {
    073                page.pageReset();
    074            }
    075        }
    076
    077        pageResponseRenderer.renderPageResponse(page);
    078    }
    079}