001 // Copyright 2004, 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.services.impl; 016 017 import java.util.Iterator; 018 019 import javax.servlet.http.HttpServletRequest; 020 import javax.servlet.http.HttpServletResponse; 021 022 import org.apache.hivemind.ErrorHandler; 023 import org.apache.tapestry.IEngine; 024 import org.apache.tapestry.IRequestCycle; 025 import org.apache.tapestry.Tapestry; 026 import org.apache.tapestry.engine.IMonitor; 027 import org.apache.tapestry.engine.IMonitorFactory; 028 import org.apache.tapestry.engine.RequestCycle; 029 import org.apache.tapestry.engine.RequestCycleEnvironment; 030 import org.apache.tapestry.engine.ServiceEncoder; 031 import org.apache.tapestry.engine.ServiceEncodingImpl; 032 import org.apache.tapestry.record.PropertyPersistenceStrategySource; 033 import org.apache.tapestry.request.RequestContext; 034 import org.apache.tapestry.services.AbsoluteURLBuilder; 035 import org.apache.tapestry.services.Infrastructure; 036 import org.apache.tapestry.services.RequestCycleFactory; 037 import org.apache.tapestry.services.ServiceConstants; 038 import org.apache.tapestry.util.QueryParameterMap; 039 import org.apache.tapestry.web.WebRequest; 040 041 /** 042 * Service that creates instances of {@link org.apache.tapestry.IRequestCycle}on behalf of an 043 * engine. 044 * 045 * @author Howard M. Lewis Ship 046 * @since 4.0 047 */ 048 public class RequestCycleFactoryImpl implements RequestCycleFactory 049 { 050 private ServiceEncoder[] _encoders; 051 052 private IMonitorFactory _monitorFactory; 053 054 private PropertyPersistenceStrategySource _strategySource; 055 056 private ErrorHandler _errorHandler; 057 058 private Infrastructure _infrastructure; 059 060 private AbsoluteURLBuilder _absoluteURLBuilder; 061 062 private RequestCycleEnvironment _environment; 063 064 private HttpServletRequest _servletRequest; 065 066 private HttpServletResponse _servletResponse; 067 068 public void initializeService() 069 { 070 RequestContext context = new RequestContext(_servletRequest, _servletResponse); 071 072 _environment = new RequestCycleEnvironment(_errorHandler, _infrastructure, context, 073 _strategySource, _absoluteURLBuilder); 074 } 075 076 public IRequestCycle newRequestCycle(IEngine engine) 077 { 078 WebRequest request = _infrastructure.getRequest(); 079 080 IMonitor monitor = _monitorFactory.createMonitor(request); 081 082 QueryParameterMap parameters = extractParameters(request); 083 084 decodeParameters(request.getActivationPath(), parameters); 085 086 String serviceName = findService(parameters); 087 088 return new RequestCycle(engine, parameters, serviceName, monitor, _environment); 089 } 090 091 private String findService(QueryParameterMap parameters) 092 { 093 String serviceName = parameters.getParameterValue(ServiceConstants.SERVICE); 094 095 return serviceName == null ? Tapestry.HOME_SERVICE : serviceName; 096 } 097 098 /** 099 * Constructs a {@link org.apache.tapestry.util.QueryParameterMap}using the parameters 100 * available from the {@link org.apache.tapestry.request.RequestContext} (but ignoring any 101 * file upload parameters!). 102 */ 103 104 private QueryParameterMap extractParameters(WebRequest request) 105 { 106 QueryParameterMap result = new QueryParameterMap(); 107 108 Iterator i = request.getParameterNames().iterator(); 109 110 while (i.hasNext()) 111 { 112 String name = (String) i.next(); 113 114 String[] values = request.getParameterValues(name); 115 116 if (values.length == 1) 117 result.setParameterValue(name, values[0]); 118 else 119 result.setParameterValues(name, values); 120 } 121 122 return result; 123 } 124 125 private void decodeParameters(String servletPath, QueryParameterMap map) 126 { 127 ServiceEncodingImpl se = new ServiceEncodingImpl(servletPath, map); 128 129 for (int i = 0; i < _encoders.length; i++) 130 { 131 _encoders[i].decode(se); 132 133 if (se.isModified()) 134 return; 135 } 136 } 137 138 public void setEncoders(ServiceEncoder[] encoders) 139 { 140 _encoders = encoders; 141 } 142 143 public void setMonitorFactory(IMonitorFactory monitorFactory) 144 { 145 _monitorFactory = monitorFactory; 146 } 147 148 public void setStrategySource(PropertyPersistenceStrategySource strategySource) 149 { 150 _strategySource = strategySource; 151 } 152 153 public void setErrorHandler(ErrorHandler errorHandler) 154 { 155 _errorHandler = errorHandler; 156 } 157 158 public void setInfrastructure(Infrastructure infrastructure) 159 { 160 _infrastructure = infrastructure; 161 } 162 163 public void setAbsoluteURLBuilder(AbsoluteURLBuilder absoluteURLBuilder) 164 { 165 _absoluteURLBuilder = absoluteURLBuilder; 166 } 167 168 public void setServletRequest(HttpServletRequest servletRequest) 169 { 170 _servletRequest = servletRequest; 171 } 172 173 public void setServletResponse(HttpServletResponse servletResponse) 174 { 175 _servletResponse = servletResponse; 176 } 177 }