defaultfiles.java

jcrontab是一个定时器开源项目包 目前提供存取文件或数据库, 把执行结果寄发 email, 简单地设置在 Tomcat, Resin, Jetty 及 JBoss 之上, 更是可以取代 cron

/**
 *  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:
 *
 *  [e-mail]
 *
 */
 
package org.jcrontab.data;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.Writer;

/**
 *	This class is a utility to make easier the instalation and use of jcrontab
 *	What it does is to create the default files "jcrontab.properties" and 
 * "crontab" and set a default initial properties ready to work in any system
 *  The reason why this class was added was to make it easier to integrate with
 *  jEdit
 * @author $Author: iolalla $
 * @version $Revision: 1.10 $
 */
public class DefaultFiles {
	
	private static String home;
	private static String FileSeparator;
		
	static {
		home = System.getProperty("user.home");
		FileSeparator = System.getProperty("file.separator");
	}

	private static String jcrontabDir = ".jcrontab";
	private static String propertiesFile = "jcrontab.properties";
	private static String log4jFile = "log4j.properties";
	private static String crontabFile = "crontab";
	private static String dir = home + FileSeparator + jcrontabDir;

	
	/**
	 *	This method loads creates the default Properties file in order to have
	 *  jcrontab working. The other option was to use getResourceAsStream with 
	 *  the properties but with this solution to change the properties was more 
	 *  complicated
	 *	@throws Exception
	 */
	public static void createPropertiesFile() throws Exception {
		File propFile = new File(dir + FileSeparator + propertiesFile);
		//System.out.println(" created : " + dir + FileSeparator + propertiesFile);
		propFile.createNewFile();
		Class cla = DefaultFiles.class;
        BufferedReader input = new BufferedReader(
            new InputStreamReader(cla.getResourceAsStream(propertiesFile)));
		BufferedWriter output = new BufferedWriter(new FileWriter(propFile));
			String strLine;
				
			while((strLine = input.readLine()) != null){
				//System.out.println(strLine);
				//strLine = strLine.trim();
				if (strLine.indexOf("{$HOME}") != -1) {
					StringBuffer strbLine = new StringBuffer(strLine);
					StringBuffer resultLine = strbLine.replace(
											   strLine.indexOf("{$HOME}"),
											   strLine.indexOf("{$HOME}") + 7,
											   home + "/" );
					strLine = resultLine.toString();
                    if (strLine.indexOf("\\") != -1) {
                        strLine = strLine.replace('\\','/');
                        //System.out.println(strLine);
                    }
				}
				strLine+="\n";
				output.write(strLine);
			}
			input.close();
			output.close();
	}

	/**
	 *	This method creates the default crontabFile This file is void to 
	 * Avoid launching undesired tasks.
	 *
	 */
	public static void createCrontabFile() throws Exception {
		File evFile = new File(dir + FileSeparator+ crontabFile);
		evFile.createNewFile();
		BufferedWriter output = new BufferedWriter(new FileWriter(evFile));
		output.write("#");
		output.close();
		//System.out.println(" created : " + dir + FileSeparator+ crontabFile);
	}
	/**
	 *	This method creates the default jcrontabDir 
	 *
	 */
	public static void createJcrontabDir() {
		File distDir = new File(dir);
		distDir.mkdir();
		//System.out.println(" created : " + dir );
	}
	
	/**
	 *	This method loads creates the default log4j.properties file in order to have
	 *  jcrontab working. The other option was to use getResourceAsStream with 
	 *  the properties but with this solution to change the properties was more 
	 *  complicated
	 *	@throws Exception
	 */
	public static void createLog4jFile() throws Exception {
		File logFile = new File(dir + FileSeparator + log4jFile);
		//System.out.println(" created : " + dir + FileSeparator + propertiesFile);
		logFile.createNewFile();
		Class cla = DefaultFiles.class;
        BufferedReader input = new BufferedReader(
            new InputStreamReader(cla.getResourceAsStream(log4jFile)));
		BufferedWriter output = new BufferedWriter(new FileWriter(logFile));
			String strLine;
				
			while((strLine = input.readLine()) != null){
				//System.out.println(strLine);
				strLine+="\n";
				output.write(strLine);
			}
			input.close();
			output.close();
	}
}