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Java > Open Source Codes > org > apache > struts > chain > servlet > ExceptionHandler


1 /*
2  * Copyright 2003,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.struts.chain.servlet;
18
19
20 import javax.servlet.http.HttpServletRequest JavaDoc;
21 import javax.servlet.http.HttpServletResponse JavaDoc;
22 import org.apache.commons.chain.Context;
23 import org.apache.commons.chain.web.servlet.ServletWebContext;
24 import org.apache.commons.logging.Log;
25 import org.apache.commons.logging.LogFactory;
26 import org.apache.struts.chain.AbstractExceptionHandler;
27 import org.apache.struts.chain.Constants;
28 import org.apache.struts.chain.util.ClassUtils;
29 import org.apache.struts.action.ActionForm;
30 import org.apache.struts.action.ActionMapping;
31 import org.apache.struts.config.ActionConfig;
32 import org.apache.struts.config.ExceptionConfig;
33 import org.apache.struts.config.ForwardConfig;
34 import org.apache.struts.config.ModuleConfig;
35
36
37 /**
38  * <p>Handle the specified exception.</p>
39  *
40  * @version $Rev: 54933 $ $Date: 2004-10-16 18:04:52 +0100 (Sat, 16 Oct 2004) $
41  */
42
43 public class ExceptionHandler extends AbstractExceptionHandler {
44
45
46     // ------------------------------------------------------ Instance Variables
47
48
49     private String JavaDoc actionFormKey = Constants.ACTION_FORM_KEY;
50
51     private static final Log log = LogFactory.getLog(ExceptionHandler.class);
52
53
54     // -------------------------------------------------------------- Properties
55
56
57     /**
58      * <p>Return the context attribute key under which the
59      * <code>ActionForm</code> for the currently selected application
60      * action is stored.</p>
61      */
62     public String JavaDoc getActionFormKey() {
63
64         return (this.actionFormKey);
65
66     }
67
68
69     /**
70      * <p>Set the context attribute key under which the
71      * <code>ActionForm</code> for the currently selected application
72      * action is stored.</p>
73      *
74      * @param actionFormKey The new context attribute key
75      */
76     public void setActionFormKey(String JavaDoc actionFormKey) {
77
78         this.actionFormKey = actionFormKey;
79
80     }
81
82
83     // ------------------------------------------------------- Protected Methods
84
85
86     protected ForwardConfig handle(Context context,
87                                    Exception JavaDoc exception,
88                                    ExceptionConfig exceptionConfig,
89                                    ActionConfig actionConfig,
90                                    ModuleConfig moduleConfig)
91         throws Exception JavaDoc {
92
93         // Look up the remaining properties needed for this handler
94 ServletWebContext swcontext = (ServletWebContext) context;
95         ActionForm actionForm = (ActionForm)
96             swcontext.get(getActionFormKey());
97         HttpServletRequest JavaDoc request = swcontext.getRequest();
98         HttpServletResponse JavaDoc response = swcontext.getResponse();
99
100         // Handle this exception
101 org.apache.struts.action.ExceptionHandler handler =
102             (org.apache.struts.action.ExceptionHandler)
103             ClassUtils.getApplicationInstance(exceptionConfig.getHandler());
104         return (handler.execute(exception,
105                                 exceptionConfig,
106                                 (ActionMapping) actionConfig,
107                                 actionForm,
108                                 request,
109                                 response));
110
111     }
112
113
114 }
115
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