Metacat

/**

 *  '$RCSfile$'

 *    Purpose: A Class that implements utility methods for a metadata catalog

 *  Copyright: 2008 Regents of the University of California and the

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Michael Daigle

 *

 *   '$Author: daigle $'

 *     '$Date: 2008-07-06 21:25:34 -0700 (Sun, 06 Jul 2008) $'

 * '$Revision: 4080 $'

 *

 * 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; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

package edu.ucsb.nceas.metacat.admin;

import java.io.IOException;

import java.util.Vector;

import javax.servlet.ServletConfig;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;

import edu.ucsb.nceas.metacat.service.PropertyService;

import edu.ucsb.nceas.metacat.service.SessionService;

import edu.ucsb.nceas.metacat.util.LDAPUtil;

import edu.ucsb.nceas.metacat.util.MetaCatUtil;

import edu.ucsb.nceas.metacat.util.RequestUtil;

import edu.ucsb.nceas.metacat.util.SkinUtil;

import edu.ucsb.nceas.metacat.util.SystemUtil;

import edu.ucsb.nceas.metacat.util.UtilException;

import edu.ucsb.nceas.utilities.PropertyNotFoundException;

/**

 * Entry servlet for the metadata configuration utility

 */

public class MetaCatAdminServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

	private Logger logMetacat = Logger.getLogger(MetaCatAdminServlet.class);

    /**

	 * Initialize the servlet

	 */

	public void init(ServletConfig config) throws ServletException {

		super.init(config);

	}

    /** Handle "GET" method requests from HTTP clients */

	public void doGet(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {

		// Process the data and send back the response

		handleGetOrPost(request, response);

	}

	/** Handle "POST" method requests from HTTP clients */

	public void doPost(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {

		// Process the data and send back the response

		handleGetOrPost(request, response);

	}

    /**

	 * Control servlet response depending on the action parameter specified

	 * 

	 * @param request

	 *            the http request information

	 * @param response

	 *            the http response to be sent back to the client

	 */

	private void handleGetOrPost(HttpServletRequest request,

			HttpServletResponse response) throws ServletException, IOException {

		String action = request.getParameter("configureType");

		logMetacat.debug("Processing admin action: " + action);

		Vector<String> processingMessage = new Vector<String>();

		Vector<String> processingErrors = new Vector<String>();

		try {

			// Update the last update time for this user if they are not new

			HttpSession httpSession = request.getSession(false);

			if (httpSession != null) {

				SessionService.touchSession(httpSession.getId());

			}

			// if ldap isn't configured, change the action to ldap.  ldap

			// needs to be set up before we do anything else

			if (!LDAPUtil.isLDAPConfigured()) {

				processingMessage.add("You must configure LDAP before "

						+ "you can continue with MetaCat configuration.");

				RequestUtil.setRequestMessage(request, processingMessage);

				action = "ldap";

				logMetacat.debug("Admin action changed to 'ldap'");

			}

			// Once ldap is configured, see if the user is logged in

			// as an administrator.  If not, they need to log in before

			// they can continue with configuration.

			if (LDAPUtil.isLDAPConfigured()

					&& !LDAPUtil.isUserLoggedInAsAdmin(request)) {

				processingMessage.add("You must log in as an administrative " + "" +

						"user before you can continue with MetaCat configuration.");

				RequestUtil.setRequestMessage(request, processingMessage);

				action = "login";

				logMetacat.debug("Admin action changed to 'login'");

			}

			if (action == null || action.equals("configure")) {

				// Forward the request main configuration page

				request.setAttribute("metaCatVersion", SystemUtil.getMetacatVersion()); 

			    request.setAttribute("propsConfigured", new Boolean(PropertyService.arePropertiesConfigured()));

			    if (PropertyService.arePropertiesConfigured()) {

					request.setAttribute("databaseVersion", 

							DBAdmin.getInstance().getDBVersion());

				}

			    request.setAttribute("ldapConfigured", new Boolean(LDAPUtil.isLDAPConfigured()));	

			    request.setAttribute("skinsConfigured", new Boolean(SkinUtil.areSkinsConfigured()));

			    request.setAttribute("metacatConfigured", new Boolean(MetaCatUtil.isMetacatConfigured()));	

				RequestUtil.forwardRequest(request, response,

						"/admin/metacat-configuration.jsp?configureType=configure");

				return;

			} else if (action.equals("properties")) {

				// process properties

				PropertiesAdmin.getInstance().configureProperties(request,

						response);

				return;

			} else if (action.equals("skins")) {

				// process skins

				SkinsAdmin.getInstance().configureSkins(request, response);

				return;

			} else if (action.equals("database")) {

				// process properties

				DBAdmin.getInstance().configureDatabase(request, response);

				return;

			} else if (action.equals("ldap")) {

				// process properties

				LDAPAdmin.getInstance().configureLDAP(request, response);

				return;

			} else if (action.equals("login")) {

				// process properties

				AuthAdmin.getInstance().authenticateUser(request, response);

				return;

			} else {

				String errorMessage = "Invalid action in configuration request: " + action;

				logMetacat.error(errorMessage);

				processingErrors.add(errorMessage);

			}

		} catch (PropertyNotFoundException pnfe) {

			String errorMessage = 

				"Property problem while handling request: " + pnfe.getMessage();

			logMetacat.error(errorMessage);

			processingErrors.add(errorMessage);

		} catch (AdminException ae) {

			String errorMessage = 

				"Admin problem while handling request: " + ae.getMessage();

			logMetacat.error(errorMessage);

			processingErrors.add(errorMessage);

		} catch (UtilException ue) {

			String errorMessage = 

				"Utility problem while handling request: " + ue.getMessage();

			logMetacat.error(errorMessage);

			processingErrors.add(errorMessage);

		}

		if (processingErrors.size() > 0) {

			RequestUtil.clearRequestMessages(request);

			RequestUtil.setRequestErrors(request,processingErrors);

			RequestUtil.forwardRequest(request, response, "/admin/metacat-configuration.jsp");

		}

	}       	

}