Name: rmT116609 Date: 06/05/2003


FULL PRODUCT VERSION :
java version "1.4.2-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-beta-b19)
Java HotSpot(TM) Client VM (build 1.4.2-beta-b19, mixed mode)

FULL OS VERSION :
Windows XP Professional Version 2002 Service Pack 1

A DESCRIPTION OF THE PROBLEM :
I am trying to customize the text actually written out to the
log by subclassing SimpleFormatter and overriding format and
formatMessage. Neither works correctly: if I override the latter
I get two printouts for every message whereas if I override the
former I get a printout that does not look at all like what it
should be.

The behaviour in the case of format overriding is especially
puzzling: if I understand this correctly, it performs the
final message processing and the returned value is what is
"published". So in the case where format returns a constant
string, as in my sample code, you should get just that.

The actual results look like the handler has two formatters:
mine + the default one, and prints every message twice, using
each formatter in turn.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1/ java Bug1 false
2/ java Bug1 true

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
1/ 05-Jun-2003 14:17:09 Bug1 main
   WARNING: [First test]
   05-Jun-2003 14:17:09 Bug1 main
   WARNING: [Second test]

2/ ===
   ===
ACTUAL -
1/ 05-Jun-2003 14:21:33 Bug1 main
   WARNING: [First test]
   05-Jun-2003 14:21:33 Bug1 main
   WARNING: First test
   05-Jun-2003 14:21:33 Bug1 main
   WARNING: [Second test]
   05-Jun-2003 14:21:33 Bug1 main
   WARNING: Second test

2/ ===
   05-Jun-2003 14:21:56 Bug1 main
   WARNING: First test
   ===
   05-Jun-2003 14:21:56 Bug1 main
   WARNING: Second test

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.logging.*;

public class Bug1 {

    public static final void main(String[] argv) {

boolean override = Boolean.valueOf(argv[0]).booleanValue();

Logger logger = Logger.getAnonymousLogger();
Handler handler = new ConsoleHandler();
Formatter format = override ?
(Formatter)new SimpleFormatter() {
public String formatMessage(LogRecord record) {
return "[" + record.getMessage() + "]"; }
public String format(LogRecord record) {
return "===\n"; } } :
(Formatter)new SimpleFormatter() {
public String formatMessage(LogRecord record) {
return "[" + record.getMessage() + "]"; } };
handler.setFormatter(format);
// this may or may not be necessary but better be safe
removeAllHandlers(logger);
logger.addHandler(handler);

logger.warning("First test");
logger.warning("Second test");
    }

    public static final void removeAllHandlers(Logger logger) {
Handler[] handlers = logger.getHandlers();
for (int i = 0; i < handlers.length; i++)
logger.removeHandler(handlers[i]);
    }
}
---------- END SOURCE ----------

(Review ID: 187202)
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