/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* FileLogger.java
* Copyright (C) 2008 University of Waikato, Hamilton, New Zealand
*/
package weka.core.logging;
import weka.core.RevisionUtils;
import weka.core.WekaPackageManager;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.Date;
/**
* A simple file logger, that just logs to a single file. Deletes the file
* when an object gets instantiated.
*
* @author fracpete (fracpete at waikato dot ac dot nz)
* @version $Revision: 6679 $
*/
public class FileLogger
extends ConsoleLogger {
/** the log file. */
protected File m_LogFile;
/** the line feed. */
protected String m_LineFeed;
/**
* Initializes the logger.
*/
protected void initialize() {
super.initialize();
// log file
m_LogFile = getLogFile();
// try to remove file
try {
if ((m_LogFile != null) && m_LogFile.exists())
m_LogFile.delete();
}
catch (Exception e) {
e.printStackTrace();
}
// the line feed
m_LineFeed = System.getProperty("line.separator");
}
/**
* Returns the log file to use.
*
* @return the log file
*/
protected File getLogFile() {
String filename;
File result;
filename = m_Properties.getProperty("LogFile", "%w/weka.log");
filename = filename.replaceAll("%t", System.getProperty("java.io.tmpdir"));
filename = filename.replaceAll("%h", System.getProperty("user.home"));
filename = filename.replaceAll("%c", System.getProperty("user.dir"));
filename = filename.replaceAll("%w", WekaPackageManager.WEKA_HOME.toString());
filename = filename.replaceAll("%%", System.getProperty("%"));
result = new File(filename);
return result;
}
/**
* Appends the given string to the log file (without new line!).
*
* @param s the string to append
*/
protected void append(String s) {
BufferedWriter writer;
if (m_LogFile == null)
return;
// append output to file
try {
writer = new BufferedWriter(new FileWriter(m_LogFile, true));
writer.write(s);
writer.flush();
writer.close();
}
catch (Exception e) {
// ignored
}
}
/**
* Performs the actual logging.
*
* @param level the level of the message
* @param msg the message to log
* @param cls the classname originating the log event
* @param method the method originating the log event
* @param lineno the line number originating the log event
*/
protected void doLog(Level level, String msg, String cls, String method, int lineno) {
// output to console
super.doLog(level, msg, cls, method, lineno);
// append output to file
append(
m_DateFormat.format(new Date()) + " " + cls + " " + method + m_LineFeed
+ level + ": " + msg + m_LineFeed);
}
/**
* Returns the revision string.
*
* @return the revision
*/
public String getRevision() {
return RevisionUtils.extract("$Revision: 6679 $");
}
}