001 // Copyright 2005 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.tapestry.portlet; 016 017 import java.io.IOException; 018 import java.util.HashMap; 019 import java.util.Map; 020 021 import org.apache.tapestry.IRequestCycle; 022 import org.apache.tapestry.Tapestry; 023 import org.apache.tapestry.engine.EngineMessages; 024 import org.apache.tapestry.engine.IEngineService; 025 import org.apache.tapestry.engine.ILink; 026 import org.apache.tapestry.services.LinkFactory; 027 import org.apache.tapestry.services.ResponseRenderer; 028 import org.apache.tapestry.services.ServiceConstants; 029 030 /** 031 * Replacement for the standard home service, used by Portlets. This exists to handle the special 032 * case where a Portlet render request arrives when there is not a Portlet action request prior ... 033 * this can happen when a Portlet is first added to a Portal page. 034 * 035 * @author Howard M. Lewis Ship 036 * @since 4.0 037 */ 038 public class PortletHomeService implements IEngineService 039 { 040 private PortletRenderer _portletRenderer; 041 042 private PortletRequestGlobals _requestGlobals; 043 044 private ResponseRenderer _responseRenderer; 045 046 private LinkFactory _linkFactory; 047 048 private PortletPageResolver _pageResolver; 049 050 public String getName() 051 { 052 return Tapestry.HOME_SERVICE; 053 } 054 055 public ILink getLink(IRequestCycle cycle, boolean post, Object parameter) 056 { 057 if (parameter != null) 058 throw new IllegalArgumentException(EngineMessages.serviceNoParameter(this)); 059 060 Map parameters = new HashMap(); 061 062 parameters.put(ServiceConstants.SERVICE, getName()); 063 064 return _linkFactory.constructLink(cycle, post, parameters, true); 065 } 066 067 public void setLinkFactory(LinkFactory linkFactory) 068 { 069 _linkFactory = linkFactory; 070 } 071 072 public void setResponseRenderer(ResponseRenderer responseRenderer) 073 { 074 _responseRenderer = responseRenderer; 075 } 076 077 public void service(IRequestCycle cycle) throws IOException 078 { 079 String pageName = _pageResolver.getPageNameForRequest(cycle); 080 081 if (_requestGlobals.isRenderRequest()) 082 { 083 _portletRenderer.renderPage(cycle, pageName); 084 return; 085 } 086 087 cycle.activate(pageName); 088 089 _responseRenderer.renderResponse(cycle); 090 } 091 092 public void setPortletRenderer(PortletRenderer portletRenderer) 093 { 094 _portletRenderer = portletRenderer; 095 } 096 097 public void setRequestGlobals(PortletRequestGlobals requestGlobals) 098 { 099 _requestGlobals = requestGlobals; 100 } 101 102 public void setPageResolver(PortletPageResolver pageResolver) 103 { 104 _pageResolver = pageResolver; 105 } 106 }