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1 // Copyright 2006, 2007, 2008 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry5.internal.services;
16
17 import org.apache.tapestry5.EventConstants;
18 import org.apache.tapestry5.internal.structure.Page;
19 import org.apache.tapestry5.services.ComponentEventResultProcessor;
20 import org.apache.tapestry5.services.PageRenderRequestHandler;
21 import org.apache.tapestry5.services.PageRenderRequestParameters;
22 import org.apache.tapestry5.services.Traditional;
23
24 import java.io.IOException;
25
26 /**
27 * Handles a PageLink as specified by a PageLinkPathSource by activating and then rendering the page.
28 */
29 public class PageRenderRequestHandlerImpl implements PageRenderRequestHandler
30 {
31 private final RequestPageCache cache;
32
33 private final ComponentEventResultProcessor resultProcessor;
34
35 private final PageResponseRenderer pageResponseRenderer;
36
37 public PageRenderRequestHandlerImpl(RequestPageCache cache,
38 @Traditional ComponentEventResultProcessor resultProcessor,
39 PageResponseRenderer pageResponseRenderer)
40 {
41 this.cache = cache;
42 this.resultProcessor = resultProcessor;
43 this.pageResponseRenderer = pageResponseRenderer;
44 }
45
46 public void handle(PageRenderRequestParameters parameters) throws IOException
47 {
48 Page page = cache.get(parameters.getLogicalPageName());
49
50 ComponentResultProcessorWrapper callback = new ComponentResultProcessorWrapper(resultProcessor);
51
52 page.getRootElement().triggerContextEvent(EventConstants.ACTIVATE, parameters.getActivationContext(),
53 callback);
54
55 // The handler will have asked the result processor to send a response.
56
57 if (callback.isAborted()) return;
58
59 pageResponseRenderer.renderPageResponse(page);
60 }
61 }