| /* |
| * $Id: LogonAction.java 360442 2005-12-31 20:10:04Z husted $ |
| * |
| * Copyright 2000-2004 Apache Software Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.struts.apps.mailreader.course; |
| |
| import org.apache.struts.apps.mailreader.dao.User; |
| import org.apache.struts.action.ActionForward; |
| import org.apache.struts.action.ActionForm; |
| import org.apache.struts.action.ActionMessages; |
| import org.apache.struts.action.ActionMapping; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import javax.servlet.http.HttpSession; |
| |
| /** |
| * <p/> |
| * Validate a user logon. |
| * </p> |
| * |
| * @version $Rev: 360442 $ $Date: 2005-12-31 15:10:04 -0500 (Sat, 31 Dec 2005) $ |
| */ |
| public final class LogonAction extends RegisterAction { |
| |
| |
| /** |
| * <p/> |
| * Store User object in client session. |
| * If user object is null, any existing user object is removed. |
| * </p> |
| * |
| * @param request The request we are processing |
| * @param user The user object returned from the database |
| */ |
| protected void doCacheUser(HttpServletRequest request, User user) { |
| |
| HttpSession session = request.getSession(); |
| session.setAttribute(USER_KEY, user); |
| } |
| |
| /** |
| * <p/> |
| * Use "username" and "password" fields from ActionForm to retrieve a User |
| * object from the database. If credentials are not valid, or database |
| * has disappeared, post error messages and forward to input. |
| * </p> |
| * |
| * @param mapping The ActionMapping used to select this instance |
| * @param form The optional ActionForm bean for this request (if any) |
| * @param request The HTTP request we are processing |
| * @param response The HTTP response we are creating |
| * @throws Exception if the application business logic throws |
| * an exception |
| */ |
| public ActionForward execute( |
| ActionMapping mapping, |
| ActionForm form, |
| HttpServletRequest request, |
| HttpServletResponse response) |
| throws Exception { |
| |
| // Retrieve user |
| String username = doGet(form, USERNAME); |
| String password = doGet(form, PASSWORD); |
| ActionMessages errors = new ActionMessages(); |
| User user = doGetUser(username, password, errors); |
| |
| // Report back any errors, and exit if any |
| if (!errors.isEmpty()) { |
| return doInputForward(mapping, request, errors); |
| } |
| |
| // Cache user object in session to signify logon |
| doCacheUser(request, user); |
| |
| // Done |
| return doFindSuccess(mapping); |
| |
| } |
| |
| } |