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Java > Open Source Codes > org > apache > turbine > modules > actions > sessionvalidator > SessionValidator


1 package org.apache.turbine.modules.actions.sessionvalidator;
2
3 /*
4  * Copyright 2001-2004 The Apache Software Foundation.
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License")
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18
19 import org.apache.turbine.modules.Action;
20
21 /**
22  * The SessionValidator attempts to retrive the User object from the
23  * Servlet API session that is associated with the request. If the
24  * data cannot be retrieved, it is handled here. If the user has not
25  * been marked as being logged into the system, the user is rejected
26  * and the screen is set to the screen.homepage value in
27  * TurbineResources.properties.
28  *
29  * <p>
30  *
31  * Other systems generally have a database table which stores this
32  * information, but we take advantage of the Servlet API here to save
33  * a hit to the database for each and every connection that a user
34  * makes.
35  *
36  * <p>
37  *
38  * This action is special in that it should only be executed by the
39  * Turbine servlet.
40  *
41  * @author <a HREF="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
42  * @version $Id: SessionValidator.java,v 1.4.2.2 2004/05/20 03:03:53 seade Exp $
43  */
44 public abstract class SessionValidator extends Action
45 {
46 }
47
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