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; 016 017 import org.apache.hivemind.ApplicationRuntimeException; 018 019 /** 020 * Exception thrown by an {@link org.apache.tapestry.engine.IEngineService} when it discovers that 021 * the {@link javax.servlet.http.HttpSession} 022 * has timed out (and been replaced by a new, empty 023 * one). 024 * 025 * <p>The application should redirect to the stale-session page. 026 * 027 * 028 * @author Howard Lewis Ship 029 * 030 **/ 031 032 public class StaleSessionException extends ApplicationRuntimeException 033 { 034 private static final long serialVersionUID = 6733303549871198597L; 035 036 private transient IPage _page; 037 private String _pageName; 038 039 public StaleSessionException() 040 { 041 this(null, null); 042 } 043 044 public StaleSessionException(String message, IPage page) 045 { 046 super(message, page, null, null); 047 _page = page; 048 049 if (page != null) 050 _pageName = page.getPageName(); 051 } 052 053 public String getPageName() 054 { 055 return _pageName; 056 } 057 058 /** 059 * Returns the page referenced by the service URL, if known, or null otherwise. 060 * 061 **/ 062 063 public IPage getPage() 064 { 065 return _page; 066 } 067 }