Metacat

/**

 *  '$RCSfile$'

 *    Purpose: A Class that tracks sessions for MetaCatServlet users.

 *  Copyright: 2000 Regents of the University of California and the

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Matt Jones

 *

 *   '$Author$'

 *     '$Date$'

 * '$Revision$'

 */

package edu.ucsb.nceas.metacat;

import javax.servlet.http.HttpSession;

import javax.servlet.http.HttpServletRequest;

import java.util.Properties;

import SrbJavaGlueInterface;

/**

 * A Class that implements session tracking for MetaCatServlet users.

 * User's login data are stored in the session object.

 * User authentication is made through SRB RMI Connection.

 */

public class MetaCatSession {

    // JNI (Java Native Interface) routines for SRB

    static String srbHost;

    static String srbPort;

    static RMIControllerInterface rmicon;

            // srbProps.properties should reside on metacat server

            srbPort = (String)SRBProps.handleGetObject("port");

            String name = "//" + RMIhost + "/RMIController";

            rmicon = (RMIControllerInterface)Naming.lookup(name);

            name = "//" + RMIhost + "/SrbJavaGlue";

        } catch (Exception e) {

            System.exit(0);

    }

    /** Construct a MetaCatSession

     *

     * @param request the request made from the client

     * @param username the username entered when login

     * @param password the password entered when login

     */

    public MetaCatSession (HttpServletRequest request,

                            throws IllegalStateException {

      this.session = getSession(request, username, password);

    }

    /** Get new HttpSession and store username & password in it */

    private HttpSession getSession(HttpServletRequest request,

                            throws IllegalStateException {

      HttpSession sess = request.getSession(true);

      // if it is still in use unvalidate and get a new one

      if ( !sess.isNew() ) {

        sess.invalidate();

        sess = request.getSession(true);

      }

      // store username & password in the session for later use if necessary

      sess.setAttribute("password", password);

      return sess;

    }

      int srbconn = 0;

      // look up for SRBJavaGlue

      try {

        String name = "//" + RMIhost + "/SrbJavaGlue";

        srbJG = (SrbJavaGlueInterface)Naming.lookup(name);

      } catch (Exception e) {

        throw new

            RemoteException("MetaCatSession look up for SrbJavaGlue failed");

      }

        srbconn = srbJG.rmiConnectJ( srbHost, srbPort, password, username );

      // check if successfull

        rmicon.restart();

      }

      // we don't need that connection. close it.

      try {

      } catch (RemoteException e) {}

      // store SRB Connection in the session for later use if necessary

      this.session.putValue("srbconnection", new Integer(srbconn));

      return true;

    }

     * Invalidate this HTTPSession object.

     * All objects stored in the session are unbound

     */

    public void disconnect() {

        this.session.invalidate();

    }

}