    001// Copyright 2006-2013 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 java.io.IOException;
    018import java.io.PrintWriter;
    019
    020import org.apache.tapestry5.MarkupWriter;
    021import org.apache.tapestry5.http.ContentType;
    022import org.apache.tapestry5.http.services.RequestGlobals;
    023import org.apache.tapestry5.http.services.Response;
    024import org.apache.tapestry5.internal.structure.Page;
    025import org.apache.tapestry5.services.MarkupWriterFactory;
    026import org.slf4j.Logger;
    027
    028public 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        MarkupWriter writer = markupWriterFactory.newMarkupWriter(page);
    063
    064        markupRenderer.renderPageMarkup(page, writer);
    065
    066        PrintWriter pw = response.getPrintWriter(contentType.toString());
    067        long startNanos = -1l;
    068        boolean debugEnabled = logger.isDebugEnabled();
    069        if (debugEnabled)
    070        {
    071            startNanos = System.nanoTime();
    072        }
    073        writer.toMarkup(pw);
    074
    075
    076        if (debugEnabled)
    077        {
    078            long endNanos = System.nanoTime();
    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}