logger.java

一个网络爬虫

package org.flaviotordini.arale;
import java.util.*;
import java.io.*;

/**
 *  Classe che si occupa del logging.
 *
 *@author     Flavio Tordini
 *@created    7 novembre 2001
 */
public class Logger {

    /**
     *  Description of the Field
     *
     *@since
     */
    public PrintStream logger = null;


    /**
     *  Sets the logFile attribute of the Logger object
     *
     *@param  filename  The new logFile value
     *@since
     */
    public void setLogFile(String filename) {

        File logfile = new File(filename);
        System.out.println("Setting log file to " + logfile);
        try {
            FileOutputStream fos = new FileOutputStream(logfile.toString(), false);
            logger = new PrintStream(fos, true);
            logger.println("Arale started at " + new java.util.Date());
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("Error setting log file");
        }

    }


    /**
     *  Description of the Method
     *
     *@param  s  Description of Parameter
     *@since
     */
    public void log(String s) {

        s = "[" + Thread.currentThread().getName() + "] " + s;

        System.out.println(s);
        logger.println(s);

    }


    /**
     *  Description of the Method
     *
     *@param  e  <...>
     *@since     27 novembre 2001
     */
    public void log(Exception e) {

        // log(e.toString());
        e.printStackTrace(logger);
        System.out.println(e.toString());

    }

}