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.hivemind.util.PropertyUtils; 019 import org.apache.tapestry.IPage; 020 import org.apache.tapestry.IRequestCycle; 021 import org.apache.tapestry.services.ResponseRenderer; 022 023 /** 024 * @author Howard M. Lewis Ship 025 * @since 4.0 026 */ 027 public class ExceptionPresenterImpl implements ExceptionPresenter 028 { 029 030 private RequestExceptionReporter _requestExceptionReporter; 031 032 private ResponseRenderer _responseRenderer; 033 034 private String _exceptionPageName; 035 036 private boolean _verbose; 037 038 public void presentException(IRequestCycle cycle, Throwable cause) 039 { 040 try 041 { 042 IPage exceptionPage = cycle.getPage(_exceptionPageName); 043 044 PropertyUtils.write(exceptionPage, "exception", cause); 045 046 cycle.activate(exceptionPage); 047 048 _responseRenderer.renderResponse(cycle); 049 } 050 catch (Throwable ex) 051 { 052 // Worst case scenario. The exception page itself is broken, leaving 053 // us with no option but to write the cause to the output. 054 055 _requestExceptionReporter.reportRequestException(ErrorMessages 056 .unableToProcessClientRequest(cause), cause); 057 058 // Also, write the exception thrown when redendering the exception 059 // page, so that can get fixed as well. 060 061 _requestExceptionReporter.reportRequestException(ErrorMessages 062 .unableToPresentExceptionPage(ex), ex); 063 064 // And throw the exception. 065 066 throw new ApplicationRuntimeException(ex.getMessage(), ex); 067 } 068 069 if (_verbose) 070 _requestExceptionReporter.reportRequestException(ErrorMessages 071 .unableToProcessClientRequest(cause), cause); 072 } 073 074 public void setExceptionPageName(String exceptionPageName) 075 { 076 _exceptionPageName = exceptionPageName; 077 } 078 079 public void setRequestExceptionReporter( 080 RequestExceptionReporter requestExceptionReporter) 081 { 082 _requestExceptionReporter = requestExceptionReporter; 083 } 084 085 public void setResponseRenderer(ResponseRenderer responseRenderer) 086 { 087 _responseRenderer = responseRenderer; 088 } 089 090 public boolean isVerbose() 091 { 092 return _verbose; 093 } 094 095 public void setVerbose(boolean verbose) 096 { 097 _verbose = verbose; 098 } 099 }