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