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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
RequestCycle.java | 70.4% | 81.3% | 88.2% | 79.9% |
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// Copyright 2004, 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package org.apache.tapestry.engine;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.commons.lang.builder.ToStringBuilder;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.hivemind.ApplicationRuntimeException;
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import org.apache.hivemind.ErrorHandler;
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import org.apache.hivemind.ErrorLog;
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import org.apache.hivemind.impl.ErrorLogImpl;
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import org.apache.hivemind.util.Defense;
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import org.apache.tapestry.IComponent;
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import org.apache.tapestry.IEngine;
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import org.apache.tapestry.IForm;
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import org.apache.tapestry.IMarkupWriter;
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import org.apache.tapestry.IPage;
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import org.apache.tapestry.IRequestCycle;
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import org.apache.tapestry.RenderRewoundException;
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import org.apache.tapestry.StaleLinkException;
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import org.apache.tapestry.Tapestry;
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import org.apache.tapestry.record.PageRecorderImpl;
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import org.apache.tapestry.record.PropertyPersistenceStrategySource;
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import org.apache.tapestry.request.RequestContext;
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import org.apache.tapestry.services.Infrastructure;
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import org.apache.tapestry.util.QueryParameterMap;
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/**
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* Provides the logic for processing a single request cycle. Provides access to the
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* {@link IEngine engine}and the {@link RequestContext}.
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*
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* @author Howard Lewis Ship
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*/
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public class RequestCycle implements IRequestCycle |
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{ |
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private static final Log LOG = LogFactory.getLog(RequestCycle.class); |
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private IPage _page;
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private IEngine _engine;
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private IEngineService _service;
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private RequestContext _requestContext;
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private IMonitor _monitor;
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private HttpServletResponse _response;
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/** @since 3.1 */
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private PropertyPersistenceStrategySource _strategySource;
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/** @since 3.1 */
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private IPageSource _pageSource;
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/** @since 3.1 */
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private Infrastructure _infrastructure;
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/**
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* Contains parameters extracted from the request context, plus any decoded by any
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* {@link ServiceEncoder}s.
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*
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* @since 3.1
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*/
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private QueryParameterMap _parameters;
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/**
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* A mapping of pages loaded during the current request cycle. Key is the page name, value is
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* the {@link IPage}instance.
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*/
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private Map _loadedPages;
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/**
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* A mapping of page recorders for the current request cycle. Key is the page name, value is the
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* {@link IPageRecorder}instance.
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*/
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private Map _pageRecorders;
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private boolean _rewinding = false; |
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private Map _attributes;
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private int _actionId; |
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109 |
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private int _targetActionId; |
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111 |
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private IComponent _targetComponent;
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/** @since 2.0.3 * */
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private Object[] _serviceParameters;
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/** @since 3.1 */
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private ErrorLog _log;
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/**
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* Standard constructor used to render a response page.
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*/
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126 | 185 |
public RequestCycle(IEngine engine, RequestContext requestContext,
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QueryParameterMap parameters, IEngineService service, Infrastructure infrastructure, |
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PropertyPersistenceStrategySource strategySource, ErrorHandler errorHandler, |
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IMonitor monitor) |
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{ |
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131 | 185 |
_engine = engine; |
132 | 185 |
_requestContext = requestContext; |
133 | 185 |
_parameters = parameters; |
134 | 185 |
_service = service; |
135 | 185 |
_infrastructure = infrastructure; |
136 | 185 |
_pageSource = _infrastructure.getPageSource(); |
137 | 185 |
_strategySource = strategySource; |
138 | 185 |
_log = new ErrorLogImpl(errorHandler, LOG);
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139 | 185 |
_monitor = monitor; |
140 |
} |
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141 |
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/**
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* Alternate constructor used <b>only for testing purposes </b>.
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*
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* @since 3.1
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*/
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147 | 1 |
public RequestCycle()
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148 |
{ |
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149 |
} |
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150 |
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/**
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* Called at the end of the request cycle (i.e., after all responses have been sent back to the
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* client), to release all pages loaded during the request cycle.
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*/
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155 |
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156 | 185 |
public void cleanup() |
157 |
{ |
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158 | 185 |
if (_loadedPages == null) |
159 | 2 |
return;
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160 |
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161 | 183 |
Iterator i = _loadedPages.values().iterator(); |
162 |
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163 | 183 |
while (i.hasNext())
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{ |
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165 | 263 |
IPage page = (IPage) i.next(); |
166 |
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167 | 263 |
_pageSource.releasePage(page); |
168 |
} |
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170 | 183 |
_loadedPages = null;
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171 | 183 |
_pageRecorders = null;
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172 |
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} |
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174 |
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175 | 185 |
public IEngineService getService()
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{ |
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177 | 185 |
return _service;
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} |
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179 |
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180 | 185 |
public String encodeURL(String URL)
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{ |
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182 | 185 |
if (_response == null) |
183 | 120 |
_response = _requestContext.getResponse(); |
184 |
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185 | 185 |
return _response.encodeURL(URL);
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} |
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187 |
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188 | 1152 |
public IEngine getEngine()
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{ |
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190 | 1152 |
return _engine;
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} |
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192 |
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193 | 749 |
public Object getAttribute(String name)
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{ |
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195 | 749 |
if (_attributes == null) |
196 | 165 |
return null; |
197 |
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198 | 584 |
return _attributes.get(name);
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} |
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200 |
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201 | 185 |
public IMonitor getMonitor()
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{ |
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203 | 185 |
return _monitor;
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} |
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205 |
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206 | 106 |
public String getNextActionId()
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{ |
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208 | 106 |
return Integer.toHexString(++_actionId);
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209 |
} |
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210 |
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211 | 493 |
public IPage getPage()
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212 |
{ |
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213 | 493 |
return _page;
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214 |
} |
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215 |
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216 |
/**
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* Gets the page from the engines's {@link IPageSource}.
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*/
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219 |
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220 | 284 |
public IPage getPage(String name)
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{ |
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222 | 284 |
Defense.notNull(name, "name");
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223 |
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224 | 284 |
IPage result = null;
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225 |
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226 | 284 |
if (_loadedPages != null) |
227 | 89 |
result = (IPage) _loadedPages.get(name); |
228 |
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229 | 284 |
if (result == null) |
230 |
{ |
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231 | 276 |
_monitor.pageLoadBegin(name); |
232 |
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233 | 276 |
result = _pageSource.getPage(this, name, _monitor);
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234 |
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235 |
// Get the recorder that will eventually observe and record
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// changes to persistent properties of the page.
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237 |
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238 | 263 |
IPageRecorder recorder = getPageRecorder(name); |
239 |
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240 |
// Have it rollback the page to the prior state. Note that
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// the page has a null observer at this time (which keeps
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// these changes from being sent to the page recorder).
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243 |
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244 | 263 |
recorder.rollback(result); |
245 |
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246 |
// Now, have the page use the recorder for any future
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247 |
// property changes.
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248 |
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249 | 263 |
result.setChangeObserver(recorder); |
250 |
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251 |
// Now that persistent properties have been restored, we can
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// attach the page to this request.
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253 |
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254 | 263 |
result.attach(_engine, this);
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255 |
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256 | 263 |
_monitor.pageLoadEnd(name); |
257 |
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258 | 263 |
if (_loadedPages == null) |
259 | 183 |
_loadedPages = new HashMap();
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260 |
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261 | 263 |
_loadedPages.put(name, result); |
262 |
} |
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263 |
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264 | 271 |
return result;
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265 |
} |
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266 |
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267 |
/**
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268 |
* Returns the page recorder for the named page. Starting with Tapestry 3.1, page recorders are
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* shortlived objects managed exclusively by the request cycle.
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*/
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271 |
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272 | 263 |
protected IPageRecorder getPageRecorder(String name)
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273 |
{ |
|
274 | 263 |
if (_pageRecorders == null) |
275 | 183 |
_pageRecorders = new HashMap();
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276 |
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277 | 263 |
IPageRecorder result = (IPageRecorder) _pageRecorders.get(name); |
278 |
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279 | 263 |
if (result == null) |
280 |
{ |
|
281 | 263 |
result = new PageRecorderImpl(name, this, _strategySource, _log); |
282 | 263 |
_pageRecorders.put(name, result); |
283 |
} |
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284 |
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285 | 263 |
return result;
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286 |
} |
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287 |
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288 | 109 |
public RequestContext getRequestContext()
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289 |
{ |
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290 | 109 |
return _requestContext;
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291 |
} |
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292 |
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293 | 2640 |
public boolean isRewinding() |
294 |
{ |
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295 | 2640 |
return _rewinding;
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296 |
} |
|
297 |
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298 | 106 |
public boolean isRewound(IComponent component) throws StaleLinkException |
299 |
{ |
|
300 |
// If not rewinding ...
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301 |
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302 | 106 |
if (!_rewinding)
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303 | 62 |
return false; |
304 |
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305 | 44 |
if (_actionId != _targetActionId)
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306 | 5 |
return false; |
307 |
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308 |
// OK, we're there, is the page is good order?
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309 |
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|
310 | 39 |
if (component == _targetComponent)
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311 | 39 |
return true; |
312 |
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|
313 |
// Woops. Mismatch.
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|
314 |
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|
315 | 0 |
throw new StaleLinkException(component, Integer.toHexString(_targetActionId), |
316 |
_targetComponent.getExtendedId()); |
|
317 |
} |
|
318 |
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|
319 | 296 |
public void removeAttribute(String name) |
320 |
{ |
|
321 | 296 |
if (LOG.isDebugEnabled())
|
322 | 0 |
LOG.debug("Removing attribute " + name);
|
323 |
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|
324 | 296 |
if (_attributes == null) |
325 | 0 |
return;
|
326 |
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|
327 | 296 |
_attributes.remove(name); |
328 |
} |
|
329 |
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|
330 |
/**
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|
331 |
* Renders the page by invoking {@link IPage#renderPage(IMarkupWriter, IRequestCycle)}. This
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|
332 |
* clears all attributes.
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333 |
*/
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|
334 |
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|
335 | 195 |
public void renderPage(IMarkupWriter writer) |
336 |
{ |
|
337 | 195 |
String pageName = _page.getPageName(); |
338 | 195 |
_monitor.pageRenderBegin(pageName); |
339 |
|
|
340 | 195 |
_rewinding = false;
|
341 | 195 |
_actionId = -1; |
342 | 195 |
_targetActionId = 0; |
343 |
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|
344 |
// Forget any attributes from a previous render cycle.
|
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345 |
|
|
346 | 195 |
if (_attributes != null) |
347 | 52 |
_attributes.clear(); |
348 |
|
|
349 | 195 |
try
|
350 |
{ |
|
351 | 195 |
_page.renderPage(writer, this);
|
352 |
|
|
353 |
} |
|
354 |
catch (ApplicationRuntimeException ex)
|
|
355 |
{ |
|
356 |
// Nothing much to add here.
|
|
357 |
|
|
358 | 15 |
throw ex;
|
359 |
} |
|
360 |
catch (Throwable ex)
|
|
361 |
{ |
|
362 |
// But wrap other exceptions in a RequestCycleException ... this
|
|
363 |
// will ensure that some of the context is available.
|
|
364 |
|
|
365 | 0 |
throw new ApplicationRuntimeException(ex.getMessage(), _page, null, ex); |
366 |
} |
|
367 |
finally
|
|
368 |
{ |
|
369 | 195 |
_actionId = 0; |
370 | 195 |
_targetActionId = 0; |
371 |
} |
|
372 |
|
|
373 | 180 |
_monitor.pageRenderEnd(pageName); |
374 |
|
|
375 |
} |
|
376 |
|
|
377 |
/**
|
|
378 |
* Rewinds an individual form by invoking {@link IForm#rewind(IMarkupWriter, IRequestCycle)}.
|
|
379 |
* <p>
|
|
380 |
* The process is expected to end with a {@link RenderRewoundException}. If the entire page is
|
|
381 |
* renderred without this exception being thrown, it means that the target action id was not
|
|
382 |
* valid, and a {@link ApplicationRuntimeException}is thrown.
|
|
383 |
* <p>
|
|
384 |
* This clears all attributes.
|
|
385 |
*
|
|
386 |
* @since 1.0.2
|
|
387 |
*/
|
|
388 |
|
|
389 | 32 |
public void rewindForm(IForm form, String targetActionId) |
390 |
{ |
|
391 | 32 |
IPage page = form.getPage(); |
392 | 32 |
String pageName = page.getPageName(); |
393 |
|
|
394 | 32 |
_rewinding = true;
|
395 |
|
|
396 | 32 |
_monitor.pageRewindBegin(pageName); |
397 |
|
|
398 | 32 |
if (_attributes != null) |
399 | 0 |
_attributes.clear(); |
400 |
|
|
401 |
// Fake things a little for getNextActionId() / isRewound()
|
|
402 |
|
|
403 | 32 |
_targetActionId = Integer.parseInt(targetActionId, 16); |
404 | 32 |
_actionId = _targetActionId - 1; |
405 |
|
|
406 | 32 |
_targetComponent = form; |
407 |
|
|
408 | 32 |
try
|
409 |
{ |
|
410 | 32 |
page.beginPageRender(); |
411 |
|
|
412 | 32 |
form.rewind(NullWriter.getSharedInstance(), this);
|
413 |
|
|
414 |
// Shouldn't get this far, because the form should
|
|
415 |
// throw the RenderRewoundException.
|
|
416 |
|
|
417 | 0 |
throw new StaleLinkException(Tapestry.format("RequestCycle.form-rewind-failure", form |
418 |
.getExtendedId()), form); |
|
419 |
} |
|
420 |
catch (RenderRewoundException ex)
|
|
421 |
{ |
|
422 |
// This is acceptible and expected.
|
|
423 |
} |
|
424 |
catch (ApplicationRuntimeException ex)
|
|
425 |
{ |
|
426 |
// RequestCycleExceptions don't need to be wrapped.
|
|
427 | 4 |
throw ex;
|
428 |
} |
|
429 |
catch (Throwable ex)
|
|
430 |
{ |
|
431 |
// But wrap other exceptions in a ApplicationRuntimeException ... this
|
|
432 |
// will ensure that some of the context is available.
|
|
433 |
|
|
434 | 1 |
throw new ApplicationRuntimeException(ex.getMessage(), page, null, ex); |
435 |
} |
|
436 |
finally
|
|
437 |
{ |
|
438 | 32 |
_actionId = 0; |
439 | 32 |
_targetActionId = 0; |
440 | 32 |
_targetComponent = null;
|
441 |
|
|
442 | 32 |
page.endPageRender(); |
443 |
|
|
444 | 32 |
_monitor.pageRewindEnd(pageName); |
445 |
|
|
446 | 32 |
_rewinding = false;
|
447 |
} |
|
448 |
} |
|
449 |
|
|
450 |
/**
|
|
451 |
* Rewinds the page by invoking {@link IPage#renderPage(IMarkupWriter, IRequestCycle)}.
|
|
452 |
* <p>
|
|
453 |
* The process is expected to end with a {@link RenderRewoundException}. If the entire page is
|
|
454 |
* renderred without this exception being thrown, it means that the target action id was not
|
|
455 |
* valid, and a {@link ApplicationRuntimeException}is thrown.
|
|
456 |
* <p>
|
|
457 |
* This clears all attributes.
|
|
458 |
*/
|
|
459 |
|
|
460 | 7 |
public void rewindPage(String targetActionId, IComponent targetComponent) |
461 |
{ |
|
462 | 7 |
String pageName = _page.getPageName(); |
463 |
|
|
464 | 7 |
_rewinding = true;
|
465 |
|
|
466 | 7 |
_monitor.pageRewindBegin(pageName); |
467 |
|
|
468 | 7 |
if (_attributes != null) |
469 | 0 |
_attributes.clear(); |
470 |
|
|
471 | 7 |
_actionId = -1; |
472 |
|
|
473 |
// Parse the action Id as hex since that's whats generated
|
|
474 |
// by getNextActionId()
|
|
475 | 7 |
_targetActionId = Integer.parseInt(targetActionId, 16); |
476 | 7 |
_targetComponent = targetComponent; |
477 |
|
|
478 | 7 |
try
|
479 |
{ |
|
480 | 7 |
_page.renderPage(NullWriter.getSharedInstance(), this);
|
481 |
|
|
482 |
// Shouldn't get this far, because the target component should
|
|
483 |
// throw the RenderRewoundException.
|
|
484 |
|
|
485 | 0 |
throw new StaleLinkException(_page, targetActionId, targetComponent.getExtendedId()); |
486 |
} |
|
487 |
catch (RenderRewoundException ex)
|
|
488 |
{ |
|
489 |
// This is acceptible and expected.
|
|
490 |
} |
|
491 |
catch (ApplicationRuntimeException ex)
|
|
492 |
{ |
|
493 |
// ApplicationRuntimeExceptions don't need to be wrapped.
|
|
494 | 0 |
throw ex;
|
495 |
} |
|
496 |
catch (Throwable ex)
|
|
497 |
{ |
|
498 |
// But wrap other exceptions in a RequestCycleException ... this
|
|
499 |
// will ensure that some of the context is available.
|
|
500 |
|
|
501 | 0 |
throw new ApplicationRuntimeException(ex.getMessage(), _page, null, ex); |
502 |
} |
|
503 |
finally
|
|
504 |
{ |
|
505 |
|
|
506 | 7 |
_actionId = 0; |
507 | 7 |
_targetActionId = 0; |
508 | 7 |
_targetComponent = null;
|
509 |
|
|
510 | 7 |
_monitor.pageRewindEnd(pageName); |
511 |
|
|
512 | 7 |
_rewinding = false;
|
513 |
} |
|
514 |
|
|
515 |
} |
|
516 |
|
|
517 | 417 |
public void setAttribute(String name, Object value) |
518 |
{ |
|
519 | 417 |
if (LOG.isDebugEnabled())
|
520 | 0 |
LOG.debug("Set attribute " + name + " to " + value); |
521 |
|
|
522 | 417 |
if (_attributes == null) |
523 | 164 |
_attributes = new HashMap();
|
524 |
|
|
525 | 417 |
_attributes.put(name, value); |
526 |
} |
|
527 |
|
|
528 | 256 |
public void setPage(IPage value) |
529 |
{ |
|
530 | 256 |
if (LOG.isDebugEnabled())
|
531 | 0 |
LOG.debug("Set page to " + value);
|
532 |
|
|
533 | 256 |
_page = value; |
534 |
} |
|
535 |
|
|
536 | 1 |
public void setPage(String name) |
537 |
{ |
|
538 | 1 |
if (LOG.isDebugEnabled())
|
539 | 0 |
LOG.debug("Set page to " + name);
|
540 |
|
|
541 | 1 |
_page = getPage(name); |
542 |
} |
|
543 |
|
|
544 |
/**
|
|
545 |
* Invokes {@link IPageRecorder#commit()}on each page recorder loaded during the request cycle
|
|
546 |
* (even recorders marked for discard).
|
|
547 |
*/
|
|
548 |
|
|
549 | 195 |
public void commitPageChanges() |
550 |
{ |
|
551 | 195 |
if (LOG.isDebugEnabled())
|
552 | 0 |
LOG.debug("Committing page changes");
|
553 |
|
|
554 | 195 |
if (_pageRecorders == null || _pageRecorders.isEmpty()) |
555 | 0 |
return;
|
556 |
|
|
557 | 195 |
Iterator i = _pageRecorders.values().iterator(); |
558 |
|
|
559 | 195 |
while (i.hasNext())
|
560 |
{ |
|
561 | 275 |
IPageRecorder recorder = (IPageRecorder) i.next(); |
562 |
|
|
563 | 275 |
recorder.commit(); |
564 |
} |
|
565 |
} |
|
566 |
|
|
567 |
/**
|
|
568 |
* As of 3.1, just a synonym for {@link #forgetPage(String)}.
|
|
569 |
*
|
|
570 |
* @since 2.0.2
|
|
571 |
*/
|
|
572 |
|
|
573 | 0 |
public void discardPage(String name) |
574 |
{ |
|
575 | 0 |
forgetPage(name); |
576 |
} |
|
577 |
|
|
578 |
/** @since 2.0.3 * */
|
|
579 |
|
|
580 | 47 |
public Object[] getServiceParameters()
|
581 |
{ |
|
582 | 47 |
return _serviceParameters;
|
583 |
} |
|
584 |
|
|
585 |
/** @since 2.0.3 * */
|
|
586 |
|
|
587 | 68 |
public void setServiceParameters(Object[] serviceParameters) |
588 |
{ |
|
589 | 68 |
_serviceParameters = serviceParameters; |
590 |
} |
|
591 |
|
|
592 |
/** @since 3.0 * */
|
|
593 |
|
|
594 | 122 |
public void activate(String name) |
595 |
{ |
|
596 | 122 |
IPage page = getPage(name); |
597 |
|
|
598 | 110 |
activate(page); |
599 |
} |
|
600 |
|
|
601 |
/** @since 3.0 */
|
|
602 |
|
|
603 | 261 |
public void activate(IPage page) |
604 |
{ |
|
605 | 261 |
if (LOG.isDebugEnabled())
|
606 | 0 |
LOG.debug("Activating page " + page);
|
607 |
|
|
608 | 261 |
Tapestry.clearMethodInvocations(); |
609 |
|
|
610 | 261 |
page.validate(this);
|
611 |
|
|
612 | 256 |
Tapestry |
613 |
.checkMethodInvocation(Tapestry.ABSTRACTPAGE_VALIDATE_METHOD_ID, "validate()", page);
|
|
614 |
|
|
615 | 256 |
setPage(page); |
616 |
} |
|
617 |
|
|
618 |
/** @since 3.1 */
|
|
619 | 408 |
public String getParameter(String name)
|
620 |
{ |
|
621 | 408 |
return _parameters.getParameterValue(name);
|
622 |
} |
|
623 |
|
|
624 |
/** @since 3.1 */
|
|
625 | 106 |
public String[] getParameters(String name)
|
626 |
{ |
|
627 | 106 |
return _parameters.getParameterValues(name);
|
628 |
} |
|
629 |
|
|
630 |
/**
|
|
631 |
* @since 3.0
|
|
632 |
*/
|
|
633 | 0 |
public String toString()
|
634 |
{ |
|
635 | 0 |
ToStringBuilder b = new ToStringBuilder(this); |
636 |
|
|
637 | 0 |
b.append("rewinding", _rewinding);
|
638 |
|
|
639 | 0 |
if (_service != null) |
640 | 0 |
b.append("service", _service.getName());
|
641 |
|
|
642 | 0 |
b.append("serviceParameters", _serviceParameters);
|
643 |
|
|
644 | 0 |
if (_loadedPages != null) |
645 | 0 |
b.append("loadedPages", _loadedPages.keySet());
|
646 |
|
|
647 | 0 |
b.append("attributes", _attributes);
|
648 | 0 |
b.append("targetActionId", _targetActionId);
|
649 | 0 |
b.append("targetComponent", _targetComponent);
|
650 |
|
|
651 | 0 |
return b.toString();
|
652 |
} |
|
653 |
|
|
654 |
/** @since 3.1 */
|
|
655 |
|
|
656 | 172 |
public String getAbsoluteURL(String partialURL)
|
657 |
{ |
|
658 | 172 |
String contextPath = _requestContext.getContextPath(); |
659 |
|
|
660 | 172 |
return _requestContext.getAbsoluteURL(contextPath + partialURL);
|
661 |
} |
|
662 |
|
|
663 |
/** @since 3.1 */
|
|
664 |
|
|
665 | 0 |
public void forgetPage(String pageName) |
666 |
{ |
|
667 | 0 |
Defense.notNull(pageName, "pageName");
|
668 |
|
|
669 | 0 |
_strategySource.discardAllStoredChanged(pageName, this);
|
670 |
} |
|
671 |
|
|
672 |
/** @since 3.1 */
|
|
673 |
|
|
674 | 0 |
public Infrastructure getInfrastructure()
|
675 |
{ |
|
676 | 0 |
return _infrastructure;
|
677 |
} |
|
678 |
} |
|