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/**
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* '$RCSfile$'
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* Purpose: A Class that implements properties methods for metacat
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* skins
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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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* Authors: Michael Daigle
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*
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* '$Author: daigle $'
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* '$Date: 2008-07-06 21:25:34 -0700 (Sun, 06 Jul 2008) $'
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* '$Revision: 4080 $'
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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.service;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Set;
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import java.util.Vector;
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import javax.servlet.ServletContext;
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import javax.servlet.http.HttpServletRequest;
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import javax.xml.transform.TransformerException;
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import org.apache.log4j.Logger;
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import edu.ucsb.nceas.metacat.util.SkinUtil;
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import edu.ucsb.nceas.metacat.util.UtilException;
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import edu.ucsb.nceas.utilities.FileUtil;
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import edu.ucsb.nceas.utilities.GeneralPropertyException;
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import edu.ucsb.nceas.utilities.PropertiesMetaData;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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import edu.ucsb.nceas.utilities.SortedProperties;
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/**
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* A suite of utility classes for the skin configuration utility
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*/
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public class SkinPropertyService implements ServiceInterface {
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private static SkinPropertyService skinService = null;
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private static String SKIN_DIR = null;
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private static String BACKUP_DIR = null;
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private static Vector<String> skinNames = null;
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private static HashMap<String, SortedProperties> skinPropertiesMap = null;
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private static HashMap<String, SortedProperties> skinBackupPropertiesMap = null;
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private static HashMap<String, PropertiesMetaData> skinMetaDataMap = null;
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private static Logger logMetacat = Logger.getLogger(SkinPropertyService.class);
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/**
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* private constructor since this is a singleton
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*
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* @param servletContext the context we will use to get relative paths
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*/
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private SkinPropertyService(ServletContext servletContext) throws ServiceException {
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try {
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initialize(servletContext);
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} catch (GeneralPropertyException gpe) {
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throw new ServiceException(
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"Properties problem while initializing PropertyService: "
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+ gpe.getMessage());
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} catch (IOException ioe) {
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throw new ServiceException("I/O Problem while initializing PropertyService: "
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+ ioe.getMessage());
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}
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}
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/**
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* Get the single instance of AuthAdmin.
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*
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* @param servletContext the context we will use to get relative paths
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* @return the single instance of AuthAdmin
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*/
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public static SkinPropertyService getInstance(ServletContext servletContext) throws ServiceException {
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if (skinService == null) {
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skinService = new SkinPropertyService(servletContext);
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}
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return skinService;
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}
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/**
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* Initialize the singleton.
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*
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* @param servletContext
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* the context we will use to get relative paths
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*/
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private void initialize(ServletContext servletContext) throws IOException,
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GeneralPropertyException {
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logMetacat.debug("Initializing SkinService");
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SKIN_DIR = "/style/skins";
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BACKUP_DIR = PropertyService.getBackupDir();
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skinNames = SkinUtil.getSkinNames();
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skinPropertiesMap = new HashMap<String, SortedProperties>();
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skinBackupPropertiesMap = new HashMap<String, SortedProperties>();
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skinMetaDataMap = new HashMap<String, PropertiesMetaData>();
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try {
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for (String skinName : skinNames) {
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String propertyFilePath = servletContext.getRealPath(SKIN_DIR)
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+ FileUtil.getFS() + skinName + FileUtil.getFS() + skinName
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+ ".properties";
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SortedProperties skinProperties = new SortedProperties(propertyFilePath);
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skinProperties.load();
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skinPropertiesMap.put(skinName, skinProperties);
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String metaDataFilePath = servletContext.getRealPath(SKIN_DIR)
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+ FileUtil.getFS() + skinName + FileUtil.getFS() + skinName
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+ ".properties.metadata.xml";
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PropertiesMetaData skinMetaData = new PropertiesMetaData(metaDataFilePath);
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skinMetaDataMap.put(skinName, skinMetaData);
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String backupPropertyFilePath = servletContext.getRealPath(BACKUP_DIR)
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+ FileUtil.getFS() + skinName + ".properties.metadata.xml";
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SortedProperties skinBackupProperties = new SortedProperties(
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backupPropertyFilePath);
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skinBackupProperties.load();
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skinBackupPropertiesMap.put(skinName, skinBackupProperties);
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}
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} catch (TransformerException te) {
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throw new GeneralPropertyException(te.getMessage());
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}
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}
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/**
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* Utility method to get a property value from the properties file for
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* a specific skin.
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*
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* @param skinName the skin for which we want to retrieve the property
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* @param propertyName
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* the name of the property requested
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* @return the String value for the property
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*/
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public static String getProperty(String skinName, String propertyName)
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throws PropertyNotFoundException {
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SortedProperties skinProperties = skinPropertiesMap.get(skinName);
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if (skinProperties == null) {
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throw new PropertyNotFoundException("There is not property map for " + skinName);
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}
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return skinProperties.getProperty(propertyName);
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}
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/**
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* Get a set of all property names for a given skin.
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*
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* @param skinName the skin for which we want to retrieve the property
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* names
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* @return Set of property names
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*/
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public static Vector<String> getPropertyNames(String skinName) throws PropertyNotFoundException {
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SortedProperties skinProperties = skinPropertiesMap.get(skinName);
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if (skinProperties == null) {
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throw new PropertyNotFoundException("There is not property map for " + skinName);
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}
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return skinProperties.getPropertyNames();
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}
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/**
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* Get a Set of all property names that start with the groupName prefix.
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*
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* @param groupName
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* the prefix of the keys to search for.
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* @return enumeration of property names
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*/
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public static Vector<String> getPropertyNamesByGroup(String skinName, String groupName) throws PropertyNotFoundException {
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SortedProperties skinProperties = skinPropertiesMap.get(skinName);
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if (skinProperties == null) {
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throw new PropertyNotFoundException("There is not property map for " + skinName);
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}
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return skinProperties.getPropertyNamesByGroup(groupName);
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}
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/**
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* Get the main backup properties file. These are configurable properties that
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* are stored outside the metacat install directories so the user does not
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* need to re-enter all the configuration information every time they do an
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* upgrade.
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*
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* @return a SortedProperties object with the backup properties
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*/
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public static HashMap<String, SortedProperties> getProperties() {
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return skinPropertiesMap;
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}
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/**
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* Get the main backup properties file. These are configurable properties that
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* are stored outside the metacat install directories so the user does not
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* need to re-enter all the configuration information every time they do an
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* upgrade.
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*
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* @return a SortedProperties object with the backup properties
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*/
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public static SortedProperties getProperties(String skinName) {
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return skinPropertiesMap.get(skinName);
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}
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/**
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* Get the main backup properties file. These are configurable properties that
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* are stored outside the metacat install directories so the user does not
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* need to re-enter all the configuration information every time they do an
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* upgrade.
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*
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* @return a SortedProperties object with the backup properties
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*/
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public static HashMap<String, SortedProperties> getBackupProperties() {
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return skinBackupPropertiesMap;
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}
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/**
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* Get the main backup properties file. These are configurable properties that
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* are stored outside the metacat install directories so the user does not
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* need to re-enter all the configuration information every time they do an
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* upgrade.
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*
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* @return a SortedProperties object with the backup properties
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*/
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public static SortedProperties getBackupProperties(String skinName) {
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return skinBackupPropertiesMap.get(skinName);
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}
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/**
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* Get the main properties metadata. This is retrieved from an xml file that
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* describes the attributes of configurable properties.
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*
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* @return a PropertiesMetaData object with the main properties metadata
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*/
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public static HashMap<String, PropertiesMetaData> getMetaData() {
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return skinMetaDataMap;
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}
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/**
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* Get the main properties metadata. This is retrieved from an xml file that
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* describes the attributes of configurable properties.
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*
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* @return a PropertiesMetaData object with the main properties metadata
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*/
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public static PropertiesMetaData getMetaData(String skinName) {
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return skinMetaDataMap.get(skinName);
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}
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/**
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* Utility method to set a property value both in memory and to the
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* properties file
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*
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* @param propertyName
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* the name of the property requested
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* @param newValue
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* the new value for the property
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*/
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public static void setProperty(String skinName, String propertyName, String newValue) throws IOException, GeneralPropertyException {
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SortedProperties skinProperties = skinPropertiesMap.get(skinName);
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if (skinProperties == null) {
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throw new GeneralPropertyException("There is not property map for " + skinName);
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}
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skinProperties.setProperty(propertyName, newValue);
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skinProperties.store();
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}
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/**
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* Utility method to set a property value in memory. This will NOT cause the
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* property to be written to disk. Use this method to set multiple
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* properties in a row without causing excessive I/O. You must call
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* persistProperties() once you're done setting properties to have them
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* written to disk.
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*
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* @param propertyName
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* the name of the property requested
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* @param newValue
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* the new value for the property
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*/
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public static void setPropertyNoPersist(String skinName, String propertyName, String newValue) throws GeneralPropertyException {
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SortedProperties skinProperties = skinPropertiesMap.get(skinName);
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if (skinProperties == null) {
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throw new GeneralPropertyException("There is not property map for " + skinName);
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}
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skinProperties.setPropertyNoPersist(propertyName, newValue);
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}
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/**
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* Save the properties to a properties file. Note, the
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* order and comments will be preserved.
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*/
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public static void persistProperties(String skinName) throws IOException, GeneralPropertyException {
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SortedProperties skinProperties = skinPropertiesMap.get(skinName);
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if (skinProperties == null) {
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throw new GeneralPropertyException("There is not property map for " + skinName);
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}
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skinProperties.store();
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}
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/**
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* Save the properties to a properties file. Note, the order and comments
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* will be preserved.
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*/
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public static void persistAllProperties() throws IOException,
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GeneralPropertyException {
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for (String skinName : skinNames) {
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persistProperties(skinName);
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}
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}
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/**
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* Writes out backup configurable properties to a file.
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*/
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public static void persistBackupProperties(String skinName, ServletContext servletContext)
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throws GeneralPropertyException {
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String metaDataFilePath = servletContext.getRealPath(SKIN_DIR) + FileUtil.getFS()
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+ skinName + FileUtil.getFS() + skinName + ".properties.metadata.xml";
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String backupPropertyFilePath = servletContext.getRealPath(BACKUP_DIR)
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+ FileUtil.getFS() + skinName + ".properties.metadata.xml";
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// Use the metadata to extract configurable properties from the
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// overall properties list, and store those properties.
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try {
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SortedProperties backupProperties =
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new SortedProperties(backupPropertyFilePath);
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// Populate the backup properties for main metacat properties using
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// the associated metadata file
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PropertiesMetaData mainMetadata = new PropertiesMetaData(metaDataFilePath);
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Set<String> mainKeySet = mainMetadata.getKeys();
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for (String propertyKey : mainKeySet) {
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backupProperties.setProperty(propertyKey, getProperty(skinName, propertyKey));
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}
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// store the properties to file
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backupProperties.store();
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} catch (TransformerException te) {
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throw new GeneralPropertyException("Could not transform backup properties xml: "
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+ te.getMessage());
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} catch (IOException ioe) {
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throw new GeneralPropertyException("Could not backup configurable properties: "
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+ ioe.getMessage());
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}
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}
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/**
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* Gets the backup properties directory
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*
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* TODO MCD figure out how to expand this. At least for Windows
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*
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* @return a string which holds the name of the backup directory. returns
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* null if directory could not be created.
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*/
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public static String getBackupDir() {
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return "/var/metacat/.metacat";
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}
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/**
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* Reports whether properties are fully configured.
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*
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* @return a boolean that is true if properties are not unconfigured and
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* false otherwise
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*/
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public static boolean areSkinsConfigured() throws UtilException {
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try {
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return !PropertyService.getProperty("configutil.skinsConfigured").equals(
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PropertyService.UNCONFIGURED);
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} catch (PropertyNotFoundException pnfe) {
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throw new UtilException("Could not determine if skins are configured: "
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+ pnfe.getMessage());
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}
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}
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/**
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* Take input from the user in an HTTP request about an property to be changed
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* and update the metacat property file with that new value if it has
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* changed from the value that was originally set.
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*
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* @param request
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* that was generated by the user
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* @param response
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* to send output back to the user
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* @param propertyName
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* the name of the property to be checked and set
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*/
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public static void checkAndSetProperty(String skinName, HttpServletRequest request,String propertyName)
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throws GeneralPropertyException {
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String value = SkinPropertyService.getProperty(skinName, propertyName);
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String newValue = request.getParameter(propertyName);
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if (newValue != null && !newValue.equals(value)) {
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SkinPropertyService.setPropertyNoPersist(skinName, propertyName, newValue);
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}
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}
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}
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