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.error; 016 017 import org.apache.hivemind.ApplicationRuntimeException; 018 import org.apache.tapestry.IPage; 019 import org.apache.tapestry.IRequestCycle; 020 import org.apache.tapestry.StaleSessionException; 021 import org.apache.tapestry.services.ResponseRenderer; 022 023 /** 024 * Used to activate a particular page to report the 025 * {@link org.apache.tapestry.StaleSessionException}. 026 * 027 * @author Howard M. Lewis Ship 028 * @since 4.0 029 */ 030 public class StaleSessionExceptionPresenterImpl implements StaleSessionExceptionPresenter 031 { 032 private RequestExceptionReporter _requestExceptionReporter; 033 034 private ResponseRenderer _responseRenderer; 035 036 private String _pageName; 037 038 public void presentStaleSessionException(IRequestCycle cycle, StaleSessionException cause) 039 { 040 try 041 { 042 IPage exceptionPage = cycle.getPage(_pageName); 043 044 cycle.activate(exceptionPage); 045 046 _responseRenderer.renderResponse(cycle); 047 } 048 catch (Exception ex) 049 { 050 // Worst case scenario. The exception page itself is broken, leaving 051 // us with no option but to write the cause to the output. 052 053 _requestExceptionReporter.reportRequestException(ErrorMessages 054 .unableToProcessClientRequest(cause), cause); 055 056 // Also, write the exception thrown when redendering the exception 057 // page, so that can get fixed as well. 058 059 _requestExceptionReporter.reportRequestException(ErrorMessages 060 .unableToPresentExceptionPage(ex), ex); 061 062 // And throw the exception. 063 064 throw new ApplicationRuntimeException(ex.getMessage(), ex); 065 } 066 067 } 068 069 public void setPageName(String pageName) 070 { 071 _pageName = pageName; 072 } 073 074 public void setRequestExceptionReporter(RequestExceptionReporter requestExceptionReporter) 075 { 076 _requestExceptionReporter = requestExceptionReporter; 077 } 078 079 public void setResponseRenderer(ResponseRenderer responseRenderer) 080 { 081 _responseRenderer = responseRenderer; 082 } 083 084 }