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/**
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* '$RCSfile$'
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* Purpose: A Class that implements login methods
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* Copyright: 2008 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* ors: Michael Daigle
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*
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* '$or: daigle $'
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* '$Date: 2008-11-25 09:54:32 -0800 (Tue, 25 Nov 2008) $'
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* '$Revision: 4628 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat.admin;
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import java.io.IOException;
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import java.util.Vector;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.log4j.Logger;
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import edu.ucsb.nceas.metacat.service.PropertyService;
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import edu.ucsb.nceas.metacat.service.ServiceException;
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import edu.ucsb.nceas.metacat.service.ServiceService;
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import edu.ucsb.nceas.metacat.util.RequestUtil;
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import edu.ucsb.nceas.metacat.util.SystemUtil;
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import edu.ucsb.nceas.utilities.FileUtil;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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import edu.ucsb.nceas.utilities.GeneralPropertyException;
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/**
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* Control the display of the login page
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*/
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public class BackupAdmin extends MetaCatAdmin {
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private static BackupAdmin Admin = null;
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private static Logger logMetacat = Logger.getLogger(BackupAdmin.class);
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// <base_dir>/metacat/.metacat/metacat.properties.backup exists
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public static final String HIDDEN_EXISTS_POPULATED = "hiddenExistsPopulated";
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// <base_dir>/metacat/.metacat exists writable and is empty dir
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public static final String HIDDEN_EXISTS_UNPOPULATED = "hiddenExistsUnPopulated";
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// <base_dir> exists writable without metacat subdirectory
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public static final String BASE_EXISTS_ONLY = "baseExistsOnly";
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// we couldn't determine the status of <base_dir>
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public static final String UNKNOWN = "unknown";
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/**
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* private constructor since this is a singleton
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*/
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private BackupAdmin() {}
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/**
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* Get the single instance of BackupAdmin.
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*
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* @return the single instance of BackupAdmin
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*/
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public static BackupAdmin getInstance() {
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if (Admin == null) {
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Admin = new BackupAdmin();
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}
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return Admin;
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}
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/**
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* Handle configuration of the backup directory
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*
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* @param request
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* the http request information
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* @param response
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* the http response to be sent back to the client
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*/
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public void configureBackup(HttpServletRequest request,
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HttpServletResponse response) throws AdminException {
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String processForm = request.getParameter("processForm");
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String formErrors = (String) request.getAttribute("formErrors");
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if (processForm == null || !processForm.equals("true") || formErrors != null) {
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// The servlet configuration parameters have not been set, or there
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// were form errors on the last attempt to configure, so redirect to
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// the web form for configuring metacat
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try {
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String backupBaseDir = SystemUtil.discoverExternalBaseDir();
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logMetacat.debug("Backup dir discovered as: " + backupBaseDir);
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String backupDirStatus = getBackupDirStatus(backupBaseDir);
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logMetacat.debug("Status of discovered backup dir: " + backupDirStatus);
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if (backupBaseDir != null) {
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request.setAttribute("backupBaseDir", backupBaseDir);
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} else {
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request.setAttribute("backupBaseDir", "");
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}
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request.setAttribute("backupDirStatus", backupDirStatus);
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// Forward the request to the JSP page
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RequestUtil.forwardRequest(request, response,
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"/admin/backup-configuration.jsp");
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} catch (IOException ioe) {
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throw new AdminException("IO problem while initializing "
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+ "backup configuration page:" + ioe.getMessage());
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} catch (ServletException se) {
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throw new AdminException("Problem forwarding request while "
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+ "initializing backup configuration page: " + se.getMessage());
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} catch (PropertyNotFoundException pnfe) {
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throw new AdminException("Problem discovering backup directory while "
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+ "initializing backup configuration page: " + pnfe.getMessage());
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}
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} else {
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// The configuration form is being submitted and needs to be
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// processed.
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Vector<String> processingSuccess = new Vector<String>();
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Vector<String> processingErrors = new Vector<String>();
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Vector<String> validationErrors = new Vector<String>();
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String backupDir = request.getParameter("backup-dir");
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String hiddenBackupDir = backupDir + FileUtil.getFS() + ".metacat";
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// Validate that the options provided are legitimate.
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validationErrors.addAll(validateOptions(request));
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if (validationErrors.size() == 0) {
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try {
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FileUtil.createDirectory(hiddenBackupDir);
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PropertyService.setProperty("application.backupDir", backupDir);
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ServiceService.refreshService("PropertyService");
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ServiceService.refreshService("SkinPropertyService");
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SystemUtil.storeExternalDirLocation(backupDir);
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} catch (IOException ue) {
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String errorMessage = "Could not create directory: " + hiddenBackupDir
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+ " : " + ue.getMessage() + ". Please try again";
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processingErrors.add(errorMessage);
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logMetacat.error(errorMessage);
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} catch (GeneralPropertyException gpe) {
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String errorMessage = "Could not set application.backupDir property "
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+ " to " + backupDir + " : " + gpe.getMessage() + ".";
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processingErrors.add(errorMessage);
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logMetacat.error(errorMessage);
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} catch (ServiceException se) {
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String errorMessage = "Could not refresh service : " + se.getMessage() + ".";
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processingErrors.add(errorMessage);
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logMetacat.error(errorMessage);
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}
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}
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try {
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if (validationErrors.size() > 0 || processingErrors.size() > 0) {
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RequestUtil.clearRequestMessages(request);
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RequestUtil.setRequestFormErrors(request, validationErrors);
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RequestUtil.setRequestErrors(request, processingErrors);
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RequestUtil.forwardRequest(request, response, "/admin");
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} else {
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// Reload the main metacat configuration page
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processingSuccess.add("Directory: " + backupDir + " configured.");
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RequestUtil.clearRequestMessages(request);
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RequestUtil.setRequestSuccess(request, processingSuccess);
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RequestUtil.forwardRequest(request, response,
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"/admin?configureType=configure&processForm=false");
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}
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} catch (IOException ioe) {
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throw new AdminException("IO problem while processing login page: "
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+ ioe.getMessage());
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} catch (ServletException se) {
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throw new AdminException("problem forwarding request while "
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+ "processing login page: " + se.getMessage());
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}
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}
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}
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/**
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* Find the status of the backup base directory. The possible statuses are:
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* -- HIDDEN_EXISTS_POPULATED
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* -- HIDDEN_EXISTS_UNPOPULATED
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* -- METACAT_EXISTS_ONLY
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* -- BASE_EXISTS_ONLY
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* -- UNKNOWN
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*
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* @param backupBaseDir the directory we want to check
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* @return a string corresponding to one of the statuses shown above.
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*/
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protected String getBackupDirStatus(String backupBaseDir) {
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if (backupBaseDir == null) {
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return UNKNOWN;
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}
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if (FileUtil.getFileStatus(backupBaseDir + FileUtil.getFS() + ".metacat" + FileUtil.getFS()
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+ "metacat.properties.backup") >= FileUtil.EXISTS_READ_WRITABLE) {
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return HIDDEN_EXISTS_POPULATED;
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}
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if (FileUtil.getFileStatus(backupBaseDir + FileUtil.getFS() + ".metacat") >= FileUtil.EXISTS_READ_WRITABLE) {
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return HIDDEN_EXISTS_UNPOPULATED;
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}
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if (FileUtil.getFileStatus(backupBaseDir) >= FileUtil.EXISTS_READ_WRITABLE) {
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return BASE_EXISTS_ONLY;
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}
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return UNKNOWN;
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}
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/**
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* Validate the most important configuration options submitted by the user.
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*
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* @return a vector holding error message for any fields that fail
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* validation.
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*/
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protected Vector<String> validateOptions(HttpServletRequest request) {
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Vector<String> errorVector = new Vector<String>();
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String backupDir = request.getParameter("backup-dir");
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String hiddenBackupDir = backupDir + FileUtil.getFS() + ".metacat";
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if (FileUtil.getFileStatus(hiddenBackupDir) > FileUtil.DOES_NOT_EXIST
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&& !FileUtil.isDirectory(hiddenBackupDir)) {
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errorVector.add(hiddenBackupDir + " exists, but is not a directory.");
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}
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String deployDir = SystemUtil.discoverDeployDir(request);
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if (backupDir.startsWith(deployDir)) {
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errorVector.add("Backup location must be outside of the application directory: "
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+ deployDir);
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}
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return errorVector;
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}
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}
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