001 // Copyright 2006, 2007, 2008, 2009, 2010 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
015 package org.apache.tapestry5.internal.services;
016
017 import java.io.IOException;
018 import java.io.PrintWriter;
019
020 import org.apache.tapestry5.ContentType;
021 import org.apache.tapestry5.MarkupWriter;
022 import org.apache.tapestry5.internal.structure.Page;
023 import org.apache.tapestry5.services.MarkupWriterFactory;
024 import org.apache.tapestry5.services.RequestGlobals;
025 import org.apache.tapestry5.services.Response;
026 import org.slf4j.Logger;
027
028 public class PageResponseRendererImpl implements PageResponseRenderer
029 {
030 private final RequestGlobals requestGlobals;
031
032 private final PageMarkupRenderer markupRenderer;
033
034 private final MarkupWriterFactory markupWriterFactory;
035
036 private final PageContentTypeAnalyzer pageContentTypeAnalyzer;
037
038 private final Response response;
039
040 private final Logger logger;
041
042 public PageResponseRendererImpl(RequestGlobals requestGlobals, MarkupWriterFactory markupWriterFactory,
043 PageMarkupRenderer markupRenderer, PageContentTypeAnalyzer pageContentTypeAnalyzer, Response response,
044 Logger logger)
045 {
046 this.requestGlobals = requestGlobals;
047 this.markupWriterFactory = markupWriterFactory;
048 this.markupRenderer = markupRenderer;
049 this.pageContentTypeAnalyzer = pageContentTypeAnalyzer;
050 this.response = response;
051 this.logger = logger;
052 }
053
054 public void renderPageResponse(Page page) throws IOException
055 {
056 assert page != null;
057
058 requestGlobals.storeActivePageName(page.getName());
059
060 ContentType contentType = pageContentTypeAnalyzer.findContentType(page);
061
062 // For the moment, the content type is all that's used determine the model for the markup writer.
063 // It's something of a can of worms.
064
065 MarkupWriter writer = markupWriterFactory.newMarkupWriter(contentType);
066
067 markupRenderer.renderPageMarkup(page, writer);
068
069 PrintWriter pw = response.getPrintWriter(contentType.toString());
070
071 long startNanos = System.nanoTime();
072
073 writer.toMarkup(pw);
074
075 long endNanos = System.nanoTime();
076
077 if (logger.isDebugEnabled())
078 {
079 long elapsedNanos = endNanos - startNanos;
080 double elapsedSeconds = ((float) elapsedNanos) / 1000000000F;
081
082 logger.debug(String.format("Response DOM streamed to markup in %.3f seconds", elapsedSeconds));
083 }
084
085 pw.close();
086 }
087 }