01: package org.apache.turbine.modules.actions.sessionvalidator;
02:
03: /*
04: * Licensed to the Apache Software Foundation (ASF) under one
05: * or more contributor license agreements. See the NOTICE file
06: * distributed with this work for additional information
07: * regarding copyright ownership. The ASF licenses this file
08: * to you under the Apache License, Version 2.0 (the
09: * "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 retrive 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 534527 2007-05-02 16:10:59Z tv $
46: */
47: public abstract class SessionValidator extends Action {
48: }
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