saveuseraction.java

老外的在线考试

/*
 * CyberTester - J2EE Web application for creating, delivering and managing tests/exams/surveys. 
 * Copyright (C) 2003 CyberDemia Research and Services Pty Ltd
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program (see the file COPYING); if not, write to the
 * Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * See the COPYING file located in the top-level-directory of
 * the archive of this program for complete text of license.
 */
package com.cyberdemia.cybertester.admin.user;

import javax.servlet.http.*;
import org.apache.struts.action.*;
import com.cyberdemia.school.*;
import com.cyberdemia.user.*;
import com.cyberdemia.cybertester.*;
import java.util.logging.*;
import com.cyberdemia.cybertester.admin.*;
import java.util.Enumeration;

/**
 * 
 * SaveUserAction is a Struts action to save the values received from 
 * the user editor to either a new or existing user.
 *  
 * @author Alexander Yap
 */
public final class SaveUserAction extends AbstractAdminAction
{
	private static final String REMOVE_PARAM_PREFIX = "remove_";	
	private static final String ADD_PARAM_PREFIX = "add_";	
	
	protected ActionForward doPerform(
		ActionMapping mapping, ActionForm form,
		HttpServletRequest request, HttpServletResponse response,
		HttpSession session) throws Exception	
	{
		// Was this transaction cancelled?
		if (isCancelled(request))
		{
			cleanup( mapping, session );
			return mapping.findForward(Constants.SUCCESS);
		}

		Logger logger = CyberTesterUtils.getLogger();
		ActionErrors errors = new ActionErrors();
		// If submitted out of order, go to error page immediately.
		if (!isTokenValid(request))
		{
			errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("error.transaction.token"));
		}

		resetToken(request);
		if (errors.isEmpty())
		{
			UserForm userForm = (UserForm)form;
			try
			{
				UserManagerHome uMgrHome = CyberTesterUtils.getUserManagerHome();
				TestManagerHome testMgrHome = CyberTesterUtils.getTestManagerHome();
				UserManager userMgr = (UserManager)uMgrHome.create();
				TestManager testMgr = (TestManager)testMgrHome.create();
				UserData data = getUserDataFromForm(userForm);
				if (userForm.isNew())
				{
					logger.log(Level.FINE, "Creating new user, name=\""+userForm.getLastName()+","+userForm.getFirstName()+"\".");
					String id = userMgr.addUser( data );
					logger.log(Level.FINE, "Created new user with email "+data.email);
				}
				else
				{
					logger.log(Level.FINE, "Updating user with email "+data.email);
					userMgr.setUserData( data );
					Enumeration pEnum = request.getParameterNames();
					while (pEnum.hasMoreElements())
					{
						String pName = (String)pEnum.nextElement();
						if (pName.startsWith(REMOVE_PARAM_PREFIX) )
						{
							if ( "true".equals(request.getParameter(pName)) )
							{
								String testId = pName.substring(REMOVE_PARAM_PREFIX.length());
								testMgr.removeTestFromUser(testId, data.id);
							}
						}
						else if (pName.startsWith(ADD_PARAM_PREFIX) )
						{
							if ( "true".equals(request.getParameter(pName)) )
							{
								String testId = pName.substring(ADD_PARAM_PREFIX.length());
								testMgr.addTestToUser(testId, data.id);
							}
						}
					}
				}
			}
			catch (UserException uex)
			{
				cleanup( mapping, session );
				errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("error.saving.user",uex.getMessage()));
				if (uex.getCode()==UserException.DUPLICATE_EMAIL)
				{
					logger.log( Level.WARNING, "Duplicate email rejected : "+userForm.getEmail());
				}
				else if (uex.getCode()==UserException.USER_NOT_FOUND)
				{
					logger.log( Level.WARNING, "Cannot find user : "+userForm.getEmail());
				}
				else
				{
					logger.log( Level.WARNING, "Cannot save User", uex);
				}
			}
			catch (Exception ex)
			{
				logger.log( Level.SEVERE, "Error saving User", ex);
				cleanup( mapping, session );
				throw ex;
			}
		}
		cleanup( mapping, session );
		
		if (!errors.isEmpty())
		{
			saveErrors(request, errors);
			return mapping.findForward(Constants.ERROR);
		}
		return mapping.findForward(Constants.SUCCESS);
	}

	private void cleanup( ActionMapping mapping, HttpSession session)
	{
		if (mapping.getAttribute() != null)
		{
			session.removeAttribute(mapping.getAttribute());
		}
		session.removeAttribute(AdminConstants.MODE_KEY);
		session.removeAttribute(AdminConstants.USER_TEST_LIST_KEY);
		session.removeAttribute(AdminConstants.NOT_USER_TEST_LIST_KEY);
	}

	private static UserData getUserDataFromForm(UserForm userForm)
	{
		UserData data = new UserData();
		data.id = userForm.getId();
		data.email = userForm.getEmail();
		data.password = userForm.getPassword();
		data.title = userForm.getTitle();
		data.firstName = userForm.getFirstName();
		data.lastName = userForm.getLastName();
		data.groups = userForm.getGroups();
		return data;
	}

}