TesgLog

package util.log;


import java.util.Calendar;
import java.util.Date;


public class TesgLog {


/**
* @param args
*/
public static void main(String[] args) {
MyLogger logger = new MyLogger();
Thread t = new Thread(logger);
t.start();
for (int i = 0; i < 5; i++) {
Date time = Calendar.getInstance().getTime();
System.out.println(time);
logger.info( time.toString() + " - My Test");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
logger.stopLogger();
}

}

package util.log;


import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Calendar;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;


public class MyLogger implements Runnable{

private BlockingQueue<String> queue = new ArrayBlockingQueue<String>(100, false);

private boolean flag = true;


@Override
public void run() {
String curDir = System.getProperty("user.dir");
System.out.println(curDir);
String logFilePath = curDir + "\\" + "log.txt";
File f = new File(logFilePath);
FileWriter fw = null;
BufferedWriter bw = null;
PrintWriter writer = null;
try{
if(!f.exists()){
f.createNewFile();
}
fw = new FileWriter(logFilePath, true);
bw = new BufferedWriter(fw);
writer = new PrintWriter(bw);
writer.println(Calendar.getInstance().getTime().toString() + ": Log beginning. ");
while (flag){
String msg = null;
msg = queue.poll();
if(msg != null && !msg.equals("")){
System.out.println(msg);
writer.println(msg);
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(writer != null)writer.close();
if(bw != null)bw.close();
if(fw != null)fw.close();
} catch (Exception e2) {
e2.printStackTrace();
}
}
}

public void info(String msg){
try {
queue.put(msg);
} catch (InterruptedException e) {
e.printStackTrace();
}
}

public void stopLogger(){
if(!(queue.size() > 0)){
flag = false;
}
else {
while(queue.size() > 0){
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
flag = false;
}
}


}