/*
* JMule - Java file sharing client
* Copyright (C) 2007-2009 JMule Team ( jmule@jmule.org / http://jmule.org )
*
* Any parts of this program derived from other projects, or contributed
* by third-party developers are copyrighted by their respective authors.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
package org.jmule.core.jkad.logger;
import static org.jmule.core.utils.Convert.byteToHexString;
import static org.jmule.core.utils.Misc.getStackTrace;
import java.io.File;
import java.io.RandomAccessFile;
import java.net.InetSocketAddress;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
/**
* Created on Mar 1, 2009
* @author binary256
* @version $Revision: 1.1 $
* Last changed by $Author: binary255 $ on $Date: 2009/07/06 14:13:25 $
*/
public class Logger {
private static final String fileHeader = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n";
private static final String fileExtension = ".log";
private static Logger singleton = null;
public static Logger getSingleton() {
if (singleton == null)
singleton = new Logger();
return singleton;
}
private String logFile;
private Queue<String> eventsToWrite = new ConcurrentLinkedQueue<String>();
private LogWriter writer = null;
private Logger() {
writer = new LogWriter();
}
public void start() {
long time = System.currentTimeMillis();
logFile = "./logs/jkad_"+time+fileExtension;
writer.start();
}
public void stop() {
writer.stopThread();
}
public void logPacket(String action,InetSocketAddress address,byte[] packetData){
String record = "<packet "+timeToXML()+" action=\""+action+"\">\n";
record += addressToXML(address);
record += "<data>"+byteToHexString(packetData, " 0x")+"</data>\n";
record += "</packet>\n";
logEvent(record);
}
public void logMessage(String message) {
String record = "<message "+timeToXML()+">\n";
record += message+"\n";
record += "</message>\n";
logEvent(record);
}
public void logException(Throwable t) {
String record = "<exception "+timeToXML()+">\n";
record += "<![CDATA[";
record += getStackTrace(t);
record += "]]>";
record += "</exception>\n";
logEvent(record);
}
private String addressToXML(InetSocketAddress address) {
String result = "<address>\n";
result += "<ip>"+address.getAddress().toString()+"</ip>\n";
result += "<port>"+address.getPort()+"</port>\n";
result += "</address>\n";
return result;
}
private String timeToXML() {
return timeToXML(System.currentTimeMillis());
}
private String timeToXML(long time) {
return "time=\""+time+"\"";
}
private void logEvent(String event) {
eventsToWrite.add(event);
if (!writer.isAlive()) {
writer = new LogWriter();
writer.start();
}
}
protected void finalize() throws Throwable {
super.finalize();
stop();
}
private class LogWriter extends Thread {
private boolean stop = false;
public LogWriter() {
super("Log writer");
}
public void run() {
try {
File tmp = new File(logFile);
RandomAccessFile file;
if (!tmp.exists()) {
file = new RandomAccessFile(logFile,"rw");
file.write(fileHeader.getBytes());
file.write("<log>\n".getBytes());
}
else {
file = new RandomAccessFile(logFile,"rw");
file.getChannel().position(file.getChannel().size() - "</log>".length());
}
while( ! stop ) {
if (eventsToWrite.isEmpty()) {
file.write("</log>".getBytes());
file.close();
return ;
}
String event = eventsToWrite.poll();
try {
file.write(event.getBytes());
} catch (Throwable e) {
e.printStackTrace();
if (stop) {
file.write("</log>".getBytes());
file.close();
return ;
}
}
}
file.write("</xml>".getBytes());
file.close();
}catch(Throwable t) {
t.printStackTrace();
}
}
public void stopThread() {
stop = true;
this.interrupt();
}
}
}