code.grnet.gr Git - pithos/blob - gss/src/gr/ebs/gss/server/Policy.java

   1 /*
   2  * Copyright 2009 Electronic Business Systems Ltd.
   3  *
   4  * This file is part of GSS.
   5  *
   6  * GSS is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GSS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 package gr.ebs.gss.server;
  20
  21 import static gr.ebs.gss.server.configuration.GSSConfigurationFactory.getConfiguration;
  22 import gr.ebs.gss.client.exceptions.ObjectNotFoundException;
  23 import gr.ebs.gss.client.exceptions.RpcException;
  24 import gr.ebs.gss.server.domain.User;
  25 import gr.ebs.gss.server.ejb.ExternalAPI;
  26
  27 import java.io.IOException;
  28
  29 import javax.naming.Context;
  30 import javax.naming.InitialContext;
  31 import javax.naming.NamingException;
  32 import javax.rmi.PortableRemoteObject;
  33 import javax.servlet.http.HttpServlet;
  34 import javax.servlet.http.HttpServletRequest;
  35 import javax.servlet.http.HttpServletResponse;
  36
  37 import org.apache.commons.logging.Log;
  38 import org.apache.commons.logging.LogFactory;
  39
  40 /**
  41  * The servlet that handles user policy acceptance.
  42  *
  43  * @author past
  44  */
  45 public class Policy extends HttpServlet {
  46         /**
  47          * The request parameter name for the acceptance flag.
  48          */
  49         private static final String ACCEPT_PARAM = "accept";
  50
  51         /**
  52          * The request parameter name for the original query string to the jsp.
  53          */
  54         private static final String QUERY_PARAM = "queryString";
  55
  56         /**
  57          * The request parameter name for the username.
  58          */
  59         private static final String USER_PARAM = "user";
  60
  61         /**
  62          * The serial version UID of the class.
  63          */
  64         private static final long serialVersionUID = 1L;
  65
  66         /**
  67          * The logger.
  68          */
  69         private static Log logger = LogFactory.getLog(Policy.class);
  70
  71         /**
  72          * A helper method that retrieves a reference to the ExternalAPI bean and
  73          * stores it for future use.
  74          *
  75          * @return an ExternalAPI instance
  76          * @throws RpcException in case an error occurs
  77          */
  78         private ExternalAPI getService() throws RpcException {
  79                 try {
  80                         final Context ctx = new InitialContext();
  81                         final Object ref = ctx.lookup(getConfiguration().getString("externalApiPath"));
  82                         return (ExternalAPI) PortableRemoteObject.narrow(ref, ExternalAPI.class);
  83                 } catch (final NamingException e) {
  84                         logger.error("Unable to retrieve the ExternalAPI EJB", e);
  85                         throw new RpcException("An error occurred while contacting the naming service");
  86                 }
  87         }
  88
  89         @Override
  90         public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
  91                 String queryString = request.getParameter(QUERY_PARAM);
  92                 String accept = request.getParameter(ACCEPT_PARAM);
  93                 String username = request.getParameter(USER_PARAM);
  94                 response.setContentType("text/html");
  95                 if (username == null) {
  96                         response.sendError(HttpServletResponse.SC_NOT_FOUND);
  97                         return;
  98                 }
  99                 User user = null;
 100                 try {
 101                         user = getService().findUser(username);
 102                         if (user == null) {
 103                                 response.sendError(HttpServletResponse.SC_NOT_FOUND);
 104                                 return;
 105                         }
 106                         if ("on".equalsIgnoreCase(accept))
 107                                 user = getService().updateUserPolicyAcceptance(user.getId(), true);
 108                         response.sendRedirect(request.getContextPath()+ "/login?" + queryString);
 109                 } catch (RpcException e) {
 110                         String error = "An error occurred while communicating with the service";
 111                         logger.error(error, e);
 112                         response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, error);
 113                         return;
 114                 } catch (ObjectNotFoundException e) {
 115                         String error = "User " + username + " was not found";
 116                         logger.warn(error, e);
 117                         response.sendError(HttpServletResponse.SC_NOT_FOUND, error);
 118                         return;
 119                 }
 120         }
 121 }