/*

  * Copyright 2005-2007 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.ksb.messaging.web;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.struts.action.RequestProcessor;

 import org.kuali.rice.kns.UserSession;

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

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

 /**

  * A RequestProcessor implementation for Struts which handles determining whether or not access

  * should be allowed to the requested KSB page.

  *

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

  */

 public class KSBStrutsRequestProcessor extends RequestProcessor {

         /**

          * This overridden method ...

          * 

          * @see org.apache.struts.action.RequestProcessor#processPreprocess(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)

          */

         @Override

         protected boolean processPreprocess(HttpServletRequest request,

                         HttpServletResponse response) {

                 final UserSession session = WebUtils.getUserSessionFromRequest(request);

         if (session == null) {

             throw new IllegalStateException("the user session has not been established");

         }

         GlobalVariables.setUserSession(session);

         GlobalVariables.clear();

                 return super.processPreprocess(request, response);

         }

 }