Questions on logging in JDK 1.4

Question

Hi,
This is my second try at getting some help on these questions. I thought I would try posting into the advanced language topics forum since I didn't get any response in the Java topics forum. I could really use some help on these two questions...
I'm using the following code to test the new logging faciliites of
SDK 1.4. I have two questions I would like to resolve.
1) Why is this coming out in XML format, and how to I change it so
it comes out in text format.
2) How can I format the log to format a single log record into a
single line, with the following fields (I want to make the log
sortable by time and date).
"date" "time" "class" "method" "thread" "message"
and will look something like this
2002-03-20 13:21:09 <SimpleLogExample:main:10> log message #4
2002-03-20 13:21:09 <SimpleLogExample:main:10> log message #5
2002-03-20 13:21:09 <SimpleLogExample:main:10> log message #6
HERE IS THE ACTUAL (PARTIAL) OUTPUT FROM THE PROGRAM
<?xml version="1.0" encoding="windows-1252" standalone="no"?>
<!DOCTYPE log SYSTEM "logger.dtd">
<log>
<record>
<date>2002-03-20T13:21:09</date>
<millis>1016652069894</millis>
<sequence>449148</sequence>
<logger>main</logger>
<level>CONFIG</level>
<class>SimpleLogExample</class>
<method>main</method>
<thread>10</thread>
<message>log message #4</message>
</record>
</log>
HERE IS THE PROGRAM
import java.util.logging.*;
import java.io.*;
public class SimpleLogExample {
public static void main(String argv[]) throws IOException {
Logger logger = Logger.getLogger("main");
logger.setUseParentHandlers(false);
logger.setLevel(Level.ALL);
FileHandler fh = new FileHandler("%t/logfiles/Main.%g.log", 10485760, 3);
fh.setLevel(Level.ALL);
logger.addHandler(fh);
for (int i=0; i<100000; i++) {
logger.severe("log message #1");
logger.warning("log message #2");
logger.info("log message #3");
logger.config("log message #4");
logger.fine("log message #5");
Thank you,
Joel

Answer 1

Here's a class I wrote to output one line per log record:
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2002</p>
* <p>Company: Synchronous Designs</p>
* @author Andrew Malcolm
* @version 1.0
import java.util.Date;
import java.util.logging.*;
import java.text.NumberFormat;
class OneLinePerRecordFormatter extends SimpleFormatter
private long m_startTime=System.currentTimeMillis();
private NumberFormat m_numberFormat=NumberFormat.getInstance();
/** constructor */
public OneLinePerRecordFormatter()
m_numberFormat.setMinimumIntegerDigits(8);
m_numberFormat.setGroupingUsed(false);
/** format */
public String format(LogRecord logRecord)
StringBuffer stringBuffer=new StringBuffer();
stringBuffer.append("TIME ");
stringBuffer.append(m_numberFormat.format(logRecord.getMillis()-m_startTime));
stringBuffer.append(" DATE ");
stringBuffer.append(new Date());
stringBuffer.append(" THREAD UID ");
stringBuffer.append(m_numberFormat.format(logRecord.getThreadID()));
stringBuffer.append(" MESSAGE ");
stringBuffer.append(logRecord.getMessage());
if (logRecord.getSourceClassName()!=null)
stringBuffer.append(" CLASS ");
stringBuffer.append(logRecord.getSourceClassName());
else
stringBuffer.append(logRecord.getLoggerName());
if (logRecord.getSourceMethodName()!=null)
stringBuffer.append(" METHOD ");
stringBuffer.append(logRecord.getSourceMethodName());
if(logRecord.getThrown()!=null)
stringBuffer.append(" EXCEPTION ");
stringBuffer.append(logRecord.getThrown().getMessage());
stringBuffer.append(" ");
for(int line=0;line<logRecord.getThrown().getStackTrace().length;line++)
stringBuffer.append(logRecord.getThrown().getStackTrace()[line]);
stringBuffer.append(" ");
stringBuffer.append("\r\n");
return stringBuffer.toString();
here's the test code:
private static Logger m_logger=Logger.global;
private static FileHandler m_fileHandler;
public static void main(String[] args)
try
m_fileHandler=new FileHandler("log.txt",true);
m_fileHandler.setFormatter(new OneLinePerRecordFormatter());
m_logger.addHandler(m_fileHandler);
catch(Exception e)
&etc