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Java > Open Source Codes > org > apache > turbine > pipeline > DefaultSessionValidationValve


1 package org.apache.turbine.pipeline;
2
3 /* ====================================================================
4  * The Apache Software License, Version 1.1
5  *
6  * Copyright (c) 2001-2003 The Apache Software Foundation. All rights
7  * reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution,
22  * if any, must include the following acknowledgment:
23  * "This product includes software developed by the
24  * Apache Software Foundation (http://www.apache.org/)."
25  * Alternately, this acknowledgment may appear in the software itself,
26  * if and wherever such third-party acknowledgments normally appear.
27  *
28  * 4. The names "Apache" and "Apache Software Foundation" and
29  * "Apache Turbine" must not be used to endorse or promote products
30  * derived from this software without prior written permission. For
31  * written permission, please contact apache@apache.org.
32  *
33  * 5. Products derived from this software may not be called "Apache",
34  * "Apache Turbine", nor may "Apache" appear in their name, without
35  * prior written permission of the Apache Software Foundation.
36  *
37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48  * SUCH DAMAGE.
49  * ====================================================================
50  *
51  * This software consists of voluntary contributions made by many
52  * individuals on behalf of the Apache Software Foundation. For more
53  * information on the Apache Software Foundation, please see
54  * <http://www.apache.org/>.
55  */
56
57 import java.io.IOException JavaDoc;
58
59 import org.apache.turbine.Turbine;
60 import org.apache.turbine.TurbineConstants;
61 import org.apache.turbine.Resolver;
62 import org.apache.turbine.RunData;
63 import org.apache.turbine.TurbineException;
64 import org.apache.turbine.ValveContext;
65 import org.apache.turbine.modules.actions.SessionValidator;
66
67 /**
68  * Implements the action portion of the "Turbine classic" processing
69  * pipeline (from the Turbine 2.x series).
70  *
71  * @author <a HREF="mailto:jvanzyl@apache.org">Jason van Zyl</a>
72  * @version $Id: DefaultSessionValidationValve.java,v 1.7 2004/11/01 20:08:41 epugh Exp $
73  */
74 public class DefaultSessionValidationValve
75     extends AbstractValve
76     implements TurbineConstants
77 {
78     protected SessionValidator sessionValidator = null;
79
80     /**
81      * Here we can setup objects that are thread safe and can be
82      * reused. We setup the session validator and the access
83      * controller.
84      */
85     public DefaultSessionValidationValve()
86         throws Exception JavaDoc
87     {
88         
89     }
90     
91     
92
93     /* (non-Javadoc)
94      * @see org.apache.turbine.Valve#initialize()
95      */
96     public void initialize() throws Exception JavaDoc {
97         super.initialize();
98         Resolver r = Turbine.getResolver();
99         if (r != null)
100         {
101             // Get the instance of the Session Validator.
102 sessionValidator = (SessionValidator)
103                 r.getModule(ACTIONS, Turbine.getConfiguration()
104                     .getString(ACTION_SESSION_VALIDATOR));
105         }
106     }
107     /**
108      * @see org.apache.turbine.Valve#invoke(RunData, ValveContext)
109      */
110     public void invoke(RunData data, ValveContext context)
111         throws IOException JavaDoc, TurbineException
112     {
113         try
114         {
115             // This is where the validation of the Session information
116 // is performed if the user has not logged in yet, then
117 // the screen is set to be Login. This also handles the
118 // case of not having a screen defined by also setting the
119 // screen to Login. If you want people to go to another
120 // screen other than Login, you need to change that within
121 // TurbineResources.properties...screen.homepage; or, you
122 // can specify your own SessionValidator action.
123 sessionValidator.execute(data);
124         }
125         catch (Exception JavaDoc e)
126         {
127             throw new TurbineException(e);
128         }
129     
130         // Pass control to the next Valve in the Pipeline
131 context.invokeNext(data);
132     }
133 }
134
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