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/**
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* '$RCSfile$'
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* Purpose: A Class that implements system utility 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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* Authors: Michael Daigle
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*
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* '$Author: daigle $'
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* '$Date: 2008-12-09 14:58:00 -0800 (Tue, 09 Dec 2008) $'
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* '$Revision: 4662 $'
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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.util;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import javax.servlet.ServletContext;
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import javax.servlet.http.HttpServletRequest;
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import org.apache.log4j.Logger;
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import edu.ucsb.nceas.metacat.MetaCatVersion;
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import edu.ucsb.nceas.metacat.service.PropertyService;
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import edu.ucsb.nceas.utilities.FileUtil;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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public class SystemUtil {
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private static Logger logMetacat = Logger.getLogger(SystemUtil.class);
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private static String METACAT_SERVLET = "metacat";
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private static int OS_CLASS = 0;
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// Class of OS. If we need more granularity, we should create a version
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// list and access it separately.
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public static int WIN_OS = 1;
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public static int LINUX_OS = 2;
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public static int MAC_OS = 3;
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public static int OTHER_OS = 4;
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/**
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* private constructor - all methods are static so there is no no need to
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* instantiate.
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*/
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private SystemUtil() {}
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/**
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* Get the OS for this system.
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* @return an integer representing the class of OS. Possibilities are:
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* WIN_OS = 1;
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* LINUX_OS = 2;
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* MAC_OS = 3;
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* OTHER_OS = 4;
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*/
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public static int getOsClass() {
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if (OS_CLASS > 0) {
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return OS_CLASS;
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}
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String osName = System.getProperty("os.name");
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if (osName.startsWith("Windows")) {
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OS_CLASS = WIN_OS;
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} else if (osName.startsWith("Linux")) {
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OS_CLASS = LINUX_OS;
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} else if (osName.startsWith("Mac")) {
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OS_CLASS = MAC_OS;
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} else if (osName.startsWith("Mac")) {
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OS_CLASS = OTHER_OS;
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}
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return OS_CLASS;
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}
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/**
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* Attempt to discover the server name. The name is retrieved from the http
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* servlet request. This is used by configuration routines before the port
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* has been populated in metacat.properties. it is possible the port that
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* the user configures might be different than the name we get here. You
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* should use getServerPort() instead of this method whenever possible.
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*
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* @param request
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* the http servlet request we will use to find the server name
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*
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* @return a string holding the server name
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*/
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public static String discoverServerName(HttpServletRequest request) {
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String serverName = request.getServerName();
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return serverName;
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}
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/**
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* Attempt to discover the server port. The port is retrieved from the http
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* servlet request. This is used by configuration routines before the port
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* has been populated in metacat.properties. it is possible the port that
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* the user configures might be different than the port we get here. You
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* should use getServerPort() instead of this method whenever possible.
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*
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* @param request
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* the http servlet request we will use to find the server port
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*
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* @return a string holding the server port
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*/
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public static String discoverServerPort(HttpServletRequest request) {
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return Integer.toString(request.getServerPort());
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}
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/**
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* Attempt to discover the server ssl port. The ssl port is assumed using
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* the standard port. This is used by configuration routines before the port
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* has been populated in metacat.properties. it is possible the prot that
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* the user configures might be different than the port we get here. You
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* should use getServerSSLPort() instead of this method whenever possible.
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*
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* @param request
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* the http servlet request we will use to find the server port
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*
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* @return a string holding the server ssl port
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*/
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public static String discoverServerSSLPort(HttpServletRequest request) {
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String serverPort = discoverServerPort(request);
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if (serverPort.length() == 4 && serverPort.charAt(0) == '8') {
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return "8443";
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}
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return "443";
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}
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/**
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* Get the server URL which is made up of the server name + : + the http
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* port number. Note that if the port is 80, it is left off.
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*
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* @return string holding the server URL
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*/
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public static String getServerURL() throws PropertyNotFoundException {
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String ServerURL = "http://" + PropertyService.getProperty("server.name");
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String httpPort = PropertyService.getProperty("server.httpPort");
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if (!httpPort.equals("80")) {
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ServerURL += ":" + httpPort;
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}
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return ServerURL;
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}
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/**
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* Get the secure server URL which is made up of the server name + : + the
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* https port number. Note that if the port is 443, it is left off.
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*
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* @return string holding the server URL
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*/
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public static String getSecureServerURL() throws PropertyNotFoundException {
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String ServerURL = "https://" + getSecureServer();
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return ServerURL;
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}
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/**
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* Get the secure server which is made up of the server name + : + the
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* https port number. Note that if the port is 443, it is left off.
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* NOTE: does NOT include "https://"
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* @see getSecureServerURL()
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*
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* @return string holding the secure server
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*/
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public static String getSecureServer() throws PropertyNotFoundException {
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String server = PropertyService.getProperty("server.name");
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String httpPort = PropertyService.getProperty("server.httpSSLPort");
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if (!httpPort.equals("443")) {
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server = server + ":" + httpPort;
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}
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return server;
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}
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/**
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* Get the CGI URL which is made up of the server URL + file separator + the
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* CGI directory
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*
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* @return string holding the server URL
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*/
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public static String getCGI_URL() throws PropertyNotFoundException{
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return getContextURL()
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+ PropertyService.getProperty("application.cgiDir");
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}
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/**
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* Get the server URL with the context. This is made up of the server URL +
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* file separator + the context
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*
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* @return string holding the server URL with context
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*/
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public static String getContextURL() throws PropertyNotFoundException {
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return getServerURL() + "/"
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+ PropertyService.getProperty("application.context");
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}
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/**
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* Get the servlet URL. This is made up of the server URL with context +
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* file separator + the metacat servlet name
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*
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* @return string holding the servlet URL
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*/
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public static String getServletURL() throws PropertyNotFoundException {
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return getContextURL() + "/" + METACAT_SERVLET;
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}
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/**
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* Get the style skins URL. This is made up of the server URL with context +
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* file separator + "style" + file separator + "skins"
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*
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* @return string holding the style skins URL
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*/
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public static String getStyleSkinsURL() throws PropertyNotFoundException {
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return getContextURL() + "/" + "style" + "/" + "skins";
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}
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/**
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* Get the style common URL. This is made up of the server URL with context +
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* file separator + "style" + file separator + "common"
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*
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* @return string holding the style common URL
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*/
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public static String getStyleCommonURL() throws PropertyNotFoundException {
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return getContextURL() + "/" + "style" + "/" + "common";
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}
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/**
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* Get the metacat version by getting the string representation from
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* metacat.properties and instantiating a MetaCatVersion object.
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* The info is set in build.properties and then populated into metacat.properties
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* at build time using Ant token replacement.
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*
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* @return a MetaCatVersion object holding metacat version information
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*/
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public static MetaCatVersion getMetacatVersion() throws PropertyNotFoundException {
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String metacatVersionString =
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PropertyService.getProperty("application.metacatVersion");
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return new MetaCatVersion(metacatVersionString);
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}
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/**
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* Gets a string that holds some description about the release. Typically this is
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* used during release candidates for display purposes and might hold something
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* like "Release Candidate 1". Normally it is empty for final production release.
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* The info is set in build.properties and then populated into metacat.properties
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* at build time using Ant token replacement.
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*
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* @return a MetaCatVersion object holding metacat version information
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*/
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public static String getMetacatReleaseInfo() throws PropertyNotFoundException {
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return PropertyService.getProperty("application.metacatReleaseInfo");
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}
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/**
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* Get the context directory. This is made up of the deployment directory + file
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* separator + context
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*
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* @return string holding the context directory
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*/
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public static String getContextDir() throws PropertyNotFoundException {
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return PropertyService.getProperty("application.deployDir") + FileUtil.getFS()
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+ PropertyService.getProperty("application.context");
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}
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/**
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* Attempt to discover the context for this application. This is a best
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* guess scenario. It is used by configuration routines before the context
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* has been populated in metacat.properties. You should always use
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* getApplicationContext() instead of this method if possible.
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*
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* @param request
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* the http servlet request we will use to find the context
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*
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* @return a string holding the context
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*/
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public static String discoverApplicationContext(HttpServletRequest request) {
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String contextPath = request.getContextPath();
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if (contextPath.charAt(0) == '/') {
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contextPath = contextPath.substring(1);
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}
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logMetacat.debug("contextPath: " + contextPath);
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return contextPath;
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}
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/**
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* Attempt to discover the external (to the metacat installation)
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* directory where metacat will hold backup files. This functionality
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* is used to populate the configuration utility initially. The user
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* can change the directory manually, so you can't rely on this method
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* to give you the actual directory.
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*
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* @return a string holding the backup directory path
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*/
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public static String discoverExternalDir() {
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if (getOsClass() == WIN_OS) {
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return "C:\\Program Files\\metacat";
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}
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return "/var/metacat";
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}
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/**
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* Get the style skins directory. This is made up of the tomcat directory
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* with context + file separator + "style" + file separator + "skins"
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*
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* @return string holding the style skins directory
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*/
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public static String getStyleSkinsDir() throws PropertyNotFoundException {
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return getContextDir() + FileUtil.getFS() + "style" + FileUtil.getFS()
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+ "skins";
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}
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/**
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* Get the SQL directory. This is made up of the context directory + file
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* separator + sql
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*
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* @return string holding the sql directory
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*/
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public static String getSQLDir() throws PropertyNotFoundException {
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return getContextDir() + FileUtil.getFS() + "WEB-INF" + FileUtil.getFS() + "sql";
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}
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/**
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* Get the default style URL from metacat.properties.
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*
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* @return string holding the default style URL
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*/
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public static String getDefaultStyleURL() throws PropertyNotFoundException {
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return getStyleCommonURL() + "/"
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+ PropertyService.getProperty("application.default-style");
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}
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/**
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* Attempt to discover the deployment directory for this application. This is a
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* best guess scenario. It is used by configuration routines before the
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* deployment directory has been populated in metacat.properties.
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*
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* @param request
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* the http servlet request we will use to find the tomcat directory
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*
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* @return a string holding the web application directory
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*/
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public static String discoverDeployDir(HttpServletRequest request) {
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ServletContext servletContext = request.getSession()
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.getServletContext();
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String realPath = servletContext.getRealPath(".");
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String contextPath = request.getContextPath();
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logMetacat.debug("realPath: " + realPath);
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logMetacat.debug("contextPath: " + contextPath);
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Pattern pattern = Pattern.compile(contextPath + "/\\.$");
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Matcher matcher = pattern.matcher(realPath);
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if (matcher.find()) {
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realPath = matcher.replaceFirst("");
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}
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return realPath;
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}
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}
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