1 package org.apache.turbine.modules.actions.sessionvalidator;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.turbine.modules.Action;
23
24 /**
25 * The SessionValidator attempts to retrieve the User object from the
26 * Servlet API session that is associated with the request. If the
27 * data cannot be retrieved, it is handled here. If the user has not
28 * been marked as being logged into the system, the user is rejected
29 * and the screen is set to the screen.homepage value in
30 * TurbineResources.properties.
31 *
32 * <p>
33 *
34 * Other systems generally have a database table which stores this
35 * information, but we take advantage of the Servlet API here to save
36 * a hit to the database for each and every connection that a user
37 * makes.
38 *
39 * <p>
40 *
41 * This action is special in that it should only be executed by the
42 * Turbine servlet.
43 *
44 * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
45 * @version $Id: SessionValidator.java 1078552 2011-03-06 19:58:46Z tv $
46 */
47 public abstract class SessionValidator extends Action
48 {
49 // empty
50 }