Metacat

/**

 *  '$RCSfile$'

 *    Purpose: A Class that implements database configuration methods

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

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Michael Daigle

 * 

 *   '$Author: daigle $'

 *     '$Date: 2008-07-24 13:47:03 -0700 (Thu, 24 Jul 2008) $'

 * '$Revision: 4155 $'

 *

 * 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.util.Vector;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

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

import edu.ucsb.nceas.metacat.shared.MetacatUtilException;

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

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

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

import edu.ucsb.nceas.utilities.FileUtil;

import edu.ucsb.nceas.utilities.GeneralPropertyException;

import edu.ucsb.nceas.utilities.SortedProperties;

/**

 * Control the display of the ezid configuration page and the processing

 * of the configuration values.

 */

public class EZIDAdmin extends MetacatAdmin {

	private static EZIDAdmin ezidAdmin = null;

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

	/**

	 * private constructor since this is a singleton

	 */

	private EZIDAdmin() throws AdminException {

	}

	/**

	 * Get the single instance of EZIDAdmin.

	 * 

	 * @return the single instance of GeoserverAdmin

	 */

	public static EZIDAdmin getInstance() throws AdminException {

		if (ezidAdmin == null) {

		    synchronized(EZIDAdmin.class) {

		        if(ezidAdmin == null) {

		            ezidAdmin = new EZIDAdmin();

		        }

		    }

		}

		return ezidAdmin;

	}

	/**

	 * Handle configuration of the database the first time that Metacat starts

	 * or when it is explicitly called. Collect necessary update information

	 * from the administrator.

	 * 

	 * @param request

	 *            the http request information

	 * @param response

	 *            the http response to be sent back to the client

	 */

	public void configureEZID(HttpServletRequest request,

			HttpServletResponse response) throws AdminException {

		String processForm = request.getParameter("processForm");

		String bypass = request.getParameter("bypass");

		String formErrors = (String) request.getAttribute("formErrors");

		if (processForm == null || !processForm.equals("true") || formErrors != null) {

			// The servlet configuration parameters have not been set, or there

			// were form errors on the last attempt to configure, so redirect to

			// the web form for configuring metacat

			try {

				// get the current configuration values

			    String enablestr = PropertyService.getProperty("guid.ezid.enabled");

				String username = PropertyService.getProperty("guid.ezid.username");

				String password = PropertyService.getProperty("guid.ezid.password");

				String baseurl = PropertyService.getProperty("guid.ezid.baseurl");

				String doishoulder = PropertyService.getProperty("guid.ezid.doishoulder.1");

				boolean enable = false;

				if (enablestr != null) {

					enable = Boolean.parseBoolean(enablestr);

				}

				request.setAttribute("guid.ezid.enabled", enable);

				request.setAttribute("guid.ezid.username", username);

				request.setAttribute("guid.ezid.password", password);

				request.setAttribute("guid.ezid.baseurl", baseurl);

				request.setAttribute("guid.ezid.doishoulder.1", doishoulder);

				// try the backup properties

                SortedProperties backupProperties = null;

                if ((backupProperties = 

                        PropertyService.getMainBackupProperties()) != null) {

                    Vector<String> backupKeys = backupProperties.getPropertyNames();

                    for (String key : backupKeys) {

                        String value = backupProperties.getProperty(key);

                        if(key != null && value != null && key.equals("guid.ezid.enabled")) {

                            enable = Boolean.parseBoolean(value);

                            request.setAttribute("guid.ezid.enabled", enable);

                        } else if (value != null) {

                            request.setAttribute(key, value);

                        }

                    }

                }

				// Forward the request to the JSP page

				RequestUtil.forwardRequest(request, response,

						"/admin/ezid-configuration.jsp", null);

			} catch (GeneralPropertyException gpe) {

				throw new AdminException("EZIDAdmin.configureEZID - Problem getting or " + 

						"setting property while initializing system properties page: " + gpe.getMessage());

			} catch (MetacatUtilException mue) {

				throw new AdminException("EZIDAdmin.configureEZID- utility problem while initializing "

						+ "system properties page:" + mue.getMessage());

			} 

		} else if (bypass != null && bypass.equals("true")) {

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

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

			// Bypass the geoserver configuration. This will not keep

			// Metacat from running.

			try {

				PropertyService.setProperty("configutil.ezidConfigured",

						PropertyService.BYPASSED);

			} catch (GeneralPropertyException gpe) {

				String errorMessage = "EZIDAdmin.configureEZID - Problem getting or setting property while "

					+ "processing system properties page: " + gpe.getMessage();

				logMetacat.error(errorMessage);

				processingErrors.add(errorMessage);

			}

			try {

				if (processingErrors.size() > 0) {

					RequestUtil.clearRequestMessages(request);

					RequestUtil.setRequestErrors(request, processingErrors);

					RequestUtil.forwardRequest(request, response, "/admin", null);

				} else {			

					// Reload the main metacat configuration page

					processingSuccess.add("EZID configuration successfully bypassed");

					RequestUtil.clearRequestMessages(request);

					RequestUtil.setRequestSuccess(request, processingSuccess);

					RequestUtil.forwardRequest(request, response, 

							"/admin?configureType=configure&processForm=false", null);

				}

			} catch (MetacatUtilException mue) {

				throw new AdminException("EZID.configureEZID - utility problem while processing ezid services "

						+ "ezidservices page: " + mue.getMessage());

			} 

		} else {

			// The configuration form is being submitted and needs to be

			// processed, setting the properties in the configuration file

			// then restart metacat

			// The configuration form is being submitted and needs to be

			// processed.

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

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

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

			try {

				// Validate that the options provided are legitimate. Note that

				// we've allowed them to persist their entries. As of this point

				// there is no other easy way to go back to the configure form

				// and preserve their entries.

				validationErrors.addAll(validateOptions(request));

				String enablestr = (String)request.getParameter("guid.ezid.enabled");

				String username = (String)request.getParameter("guid.ezid.username");

                String password = (String)request.getParameter("guid.ezid.password");

                String baseurl = (String)request.getParameter("guid.ezid.baseurl");

                String doishoulder = (String)request.getParameter("guid.ezid.doishoulder.1");

                boolean enable = false;

                if (enablestr != null) {

                    enable = Boolean.parseBoolean(enablestr);

                }

				if (username == null || password == null) {

					validationErrors.add("User Name and Password cannot be null");

				} else {

				    PropertyService.setPropertyNoPersist("guid.ezid.enabled", Boolean.toString(enable));

					PropertyService.setPropertyNoPersist("guid.ezid.username", username);

					PropertyService.setPropertyNoPersist("guid.ezid.password", password);

					PropertyService.setPropertyNoPersist("guid.ezid.baseurl", baseurl);

					PropertyService.setPropertyNoPersist("guid.ezid.doishoulder.1", doishoulder);

					// persist them all

					PropertyService.persistProperties();

					PropertyService.syncToSettings();

                    // save a backup in case the form has errors, we reload from these

                    PropertyService.persistMainBackupProperties();

				}

			}  catch (GeneralPropertyException gpe) {

				String errorMessage = "EZIDAdmin.configureEZID - Problem getting or setting property while "

						+ "processing system properties page: " + gpe.getMessage();

				logMetacat.error(errorMessage);

				processingErrors.add(errorMessage);

			}

			try {

				if (validationErrors.size() > 0 || processingErrors.size() > 0) {

					RequestUtil.clearRequestMessages(request);

					RequestUtil.setRequestFormErrors(request, validationErrors);

					RequestUtil.setRequestErrors(request, processingErrors);

					RequestUtil.forwardRequest(request, response, "/admin", null);

				} else {

					// Now that the options have been set, change the

					// 'propertiesConfigured' option to 'true'

					PropertyService.setProperty("configutil.ezidConfigured",

							PropertyService.CONFIGURED);

					// Reload the main metacat configuration page

					processingSuccess.add("EZID successfully configured");

					RequestUtil.clearRequestMessages(request);

					RequestUtil.setRequestSuccess(request, processingSuccess);

					RequestUtil.forwardRequest(request, response, 

							"/admin?configureType=configure&processForm=false", null);

				}

			} catch (MetacatUtilException mue) {

				throw new AdminException("EZIDAdmin.configureEZID - utility problem while processing ezidservices "

						+ "ezidservices page: " + mue.getMessage());

			} catch (GeneralPropertyException gpe) {

				throw new AdminException("EZIDAdmin.configureEZID - problem with properties while "

						+ "processing ezidservices configuration page: " + gpe.getMessage());

			}

		}

	}

	/**

	 * Validate the most important configuration options submitted by the user.

	 * 

	 * @return a vector holding error message for any fields that fail

	 *         validation.

	 */

	protected Vector<String> validateOptions(HttpServletRequest request) {

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

		// TODO MCD validate options.

		return errorVector;

	}

}