/** *  This file is part of the jcrontab package *  Copyright (C) 2001-2003 Israel Olalla * *  This library is free software; you can redistribute it and/or *  modify it under the terms of the GNU Lesser General Public *  License as published by the Free Software Foundation; either *  version 2 of the License, or (at your option) any later version. * *  This library 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 *  Lesser General Public License for more details. * *  You should have received a copy of the GNU Lesser General Public *  License along with this library; if not, write to the Free *  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, *  MA 02111-1307, USA * *  For questions, suggestions: * *  iolalla@yahoo.com * */package org.jcrontab.web;  import java.io.FileInputStream;import java.io.InputStream;import java.io.IOException;import java.util.Enumeration;import java.util.Properties;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import org.jcrontab.Crontab;import org.jcrontab.log.Log;/** * @author $Author: iolalla $ * @version $Revision: 1.27 $ */public class loadCrontabServlet extends HttpServlet {	    private Crontab crontab = null;        /** Refer to Servlet Javadoc         * This method is invoked by the Servlet container		 * When the app-server starts.         * @param config The ServletConfig         */ 	public void init(ServletConfig config) throws ServletException{		super.init(config);				try {			System.out.print("Working?...");            		process();			System.out.println("OK");		} catch (Exception e) {			throw new ServletException(e);		}	}	protected InputStream createPropertiesStream(String name)		throws IOException {		return new FileInputStream(name);	}	 /** 	  * This method  starts the Crontab and lets the system	  * Continue without wasting more resources.	  * This method can receive the config File as a variable in web.xml	  */        	public void process() {		String propz = "jcrontab.properties";		//String path = getServletConfig().getServletContext()		//								.getRealPath(".");		//System.out.println("Real Path: " + path);		String props = getServletConfig()				.getInitParameter("PROPERTIES_FILE");		if (props == null) {			props = propz;		}		// Load the servlet config parameters		// and override the properties		Properties propObj = new Properties();		try {		    InputStream input = createPropertiesStream(props);		    propObj.load(input);		} catch (IOException ioe) {		    ioe.printStackTrace();		}		 ServletConfig c = getServletConfig();		 Enumeration keys = c.getInitParameterNames();		 while (keys.hasMoreElements()) {		     String key = (String) keys.nextElement();		     propObj.setProperty(key, c.getInitParameter(key));		 }		crontab = Crontab.getInstance();		try {			ShutdownHook();			crontab.init(propObj);		} catch (Exception e) {			Log.error(e.toString(), e);		}	}	    /**	 * This method seths a ShutdownHook to the system	 *  This traps the CTRL+C or kill signal and shutdows 	 * Correctly the system.	 * @throws Exception	 */ 	 public void ShutdownHook() throws Exception {             Runtime.getRuntime().addShutdownHook(new Thread() {         	 	public void run() {                doStop();				}			});    }         public void destroy() {        doStop();    }        public void doStop() {        	Log.info("Shutting down...");			// stops the system in 100 miliseconds :-)			crontab.uninit(100);			Log.info("Stoped");    }}