| // Copyright 2005 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry.error; |
| |
| import org.apache.tapestry.IRequestCycle; |
| |
| /** |
| * Invoked by the {@link org.apache.tapestry.IEngine} if there's an uncaught |
| * exception (checked or runtime) processing a request. The ExceptionPresenter |
| * is responsible for presenting a exception message (or description) to the |
| * user. The default implementation activates the "Exception" page, but it is |
| * common to override this to do something application specific (typically, |
| * return to the Home page and display an error message there). This service |
| * also provides a good hook for creating a server-side log of exceptions. |
| * |
| * @author Howard M. Lewis Ship |
| * @since 4.0 |
| * @see RequestExceptionReporter |
| */ |
| public interface ExceptionPresenter |
| { |
| |
| /** |
| * Report the exception and provide some response to the user in lieu of the |
| * expected result page. |
| * |
| * @param cycle |
| * the current request cycle |
| * @param cause |
| * the exception that was caught |
| */ |
| |
| void presentException(IRequestCycle cycle, Throwable cause); |
| } |
