/*

  * Copyright 2006-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  *

  * 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.kuali.rice.kns.web.struts.action;

 import org.apache.struts.action.Action;

 import org.apache.struts.action.ActionForm;

 import org.apache.struts.action.ActionForward;

 import org.apache.struts.action.ActionMapping;

 import org.kuali.rice.core.api.config.property.ConfigContext;

 import org.kuali.rice.core.framework.services.CoreFrameworkServiceLocator;

 import org.kuali.rice.kns.util.KNSConstants;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 /**

  * This class handles the logout. After logout it will do an external redirect to an url

  * specified by a Parameter (LOGOUT_REDIRECT_URL) or a config property (rice.portal.logout.redirectUrl).

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  *

  */

 public class KualiLogoutAction extends Action {

     /**

      * Invalidates the users session and redirects to a configurable url after logout.

      * 

      */

     @Override

     public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

         String redirectString = null;

         // can't check for the existence of a simple parameter, so catch exception and

         // defualt to config parameter

         try {

             redirectString = CoreFrameworkServiceLocator.getParameterService().getParameterValueAsString(KNSConstants.KNS_NAMESPACE, KNSConstants.DetailTypes.ALL_DETAIL_TYPE, KNSConstants.LOGOFF_REDIRECT_URL_PARAMETER);

         }

         catch(IllegalArgumentException ex) {

             redirectString = ConfigContext.getCurrentContextConfig().getProperty(KNSConstants.LOGOFF_REDIRECT_URL_PROPERTY);

         }

         request.getSession().invalidate();

         return new ActionForward(redirectString, true);

     }

 }