On Oct 11, 2007, at 6:46 PM, Julio S. G. wrote:
On 10/11/07, Julio S. G. <[EMAIL PROTECTED]> wrote:
Hi,
I'm trying to create several appenders and unfortunately it's not
working.
To create the objects I'm using something like new
DailyRollingFileAppender() with corrects parameters. Then I
create the
Logger using the appender name.
Finally, when I use the Logger object to write, it doesn't work.
I'll put the code here and if anyone could help me I really
appreciate.
Layout layout1 = new PatternLayout("%m%n");
Layout layout2 = new PatternLayout("%m%n");
DailyRollingFileAppender app1 = new
DailyRollingFileAppender(layout1, "/file1.log", "'.'yyyyMMddHH");
DailyRollingFileAppender app2 = new
DailyRollingFileAppender(layout2, "/file2.log", "'.'yyyyMMddHH");
app1.setThreshold(Level.DEBUG);
app2.setThreshold(Level.DEBUG);
app1.setName("APPENDER1");
app2.setName("APPENDER2");
// as previously mentioned
app1.activateOptions();
app2.activateOptions();
Logger logger1 = Logger.getLogger(app1.getName());
Logger logger2 = Logger.getLogger(app2.getName());
That the appender and logger have the same name in no way connects
them. At this point, you have two appenders called "APPENDER1" and
"APPENDER2" with DEBUG threshold and two loggers named "APPENDER1"
and "APPENDER2" with no explicit threshold which will default to DEBUG.
It is common and more efficient to set the threshold on the logger
since that is checked before a LoggingEvent is created. The
threshold of the Appender is only checked after the logger threshold
is checked, the LoggingEvent is created and then dispatched to the
Appender.
Logger names are generally (but not necessarily) based on class
names. While "APPENDER1" and "APPENDER2" are totally legal logger
names, they are definitely unusual. In general, you'd want to attach
at least one appender to the root logger, so that anything that is
logged with an unexpected logger goes somewhere. If you want a
particular set of messages to go to one and only one appender, the
general pattern is to attach one appender to the root logger and the
other appender to a particular logger and set that loggers additivity
to false so the message doesn't get passed down the hierarchy.
Something like:
Logger rootLogger = Logger.getRootLogger();
rootLogger.addAppender(app1);
Logger logger1 = Logger.getLogger("com.example.myapp.Logger1");
Logger logger2 = Logger.getLogger("com.example.myapp.Logger2");
logger2.setAdditivity(false);
logger2.addAppender(app2);
logger1.info("TEST 1!!!");
logger2.info("TEST 2!!!");
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