2009/05/20 - Apache Shale has been retired.

For more information, please explore the Attic.


1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to you under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.shale.view.impl;
19  
20  import java.util.ArrayList;
21  import java.util.List;
22  import javax.faces.context.FacesContext;
23  import org.apache.shale.view.ExceptionHandler;
24  import org.apache.shale.view.faces.FacesConstants;
25  
26  /***
27   * <p>Default implementation of the {@link ExceptionHandler} interface.</p>
28   *
29   * $Id: ExceptionHandlerImpl.java 422609 2006-07-17 03:17:18Z craigmcc $
30   */
31  public class DefaultExceptionHandler implements ExceptionHandler {
32  
33  
34      /***
35       * <p>Log the specified exception, and record it in a request scoped
36       * <code>List</code> that can be used to report them all at a future
37       * point in time to report all of the accumulated exceptions.</p>
38       *
39       * @param exception Exception to be handled
40       */
41      public void handleException(Exception exception) {
42  
43          // Log the exception unconditionally
44          FacesContext context = FacesContext.getCurrentInstance();
45          if (context != null) {
46              context.getExternalContext().log(exception.getMessage(), exception);
47          } else {
48              System.out.println(exception.getMessage());
49              exception.printStackTrace(System.out);
50          }
51  
52          // Are we within the context of a JavaServer Faces request?
53          // If so, accumulate this exception to the list that can be
54          // reported at the completion of the request.
55          if (context == null) {
56              return;
57          }
58          List list = (List) context.getExternalContext().getRequestMap().
59                  get(FacesConstants.EXCEPTIONS_LIST);
60          if (list == null) {
61              list = new ArrayList();
62              context.getExternalContext().getRequestMap().
63                      put(FacesConstants.EXCEPTIONS_LIST, list);
64          }
65          list.add(exception);
66  
67      }
68  
69  
70  }