|
Dear Sir,
Actually we r implementing log4j in our
project
its storing error messages in a log file according to priority
given.
but it shows an error ...can u help or sort out whats that error
is ?
it will quite helpful in our project.
The error
is...
log4j:ERROR No output target set for appender named
"null".
I have assigned the value for FileAppender too but
its throwing error .
I have send the sample how we r
using the file .
So please help out to solve the problem sir.
Also we r thinking of using a single config file in which one
fileappender carries all the logging statements of our whole project. So
If u come across any idea pls help us to solve our problem.
Also we want to know whether shutDown method of class
category can be used and how far it is useful for stopping the
logging. does it affect the application?.
we feel log4j is a good utility for logging and improving
performance.
1) The Sample File
import org.apache.log4j.Category;
import
org.apache.log4j.PropertyConfigurator;
import
org.apache.log4j.FileAppender;
public class
LogTester{
public static Category NORM =
Category.getInstance("NORM");;
public static Category DEV =
Category.getInstance("DEV");;
//
PropertyConfigurator.configure(file);
/*NORM =
Category.getInstance("NORM");
NORM.addAppender(f);
DEV =
Category.getInstance("DEV");
DEV.addAppender(f);*/
public
LogTester(){
NORM =
Category.getInstance("NORM");
DEV =
Category.getInstance("DEV");
}
public
LogTester(String file){
FileAppender f = new
FileAppender();
PropertyConfigurator.configure("tester.lcf");
NORM.addAppender(f);
DEV.addAppender(f);
//
init logging system
ScreenAppender A1 = new
ScreenAppender();
NORM.info("Clearing and Settlement starting
up...");
}
public void
testMethod1()
{
NORM.info("Print
11111111111111111111");
NORM.error("Print
22222222222222222222");
NORM.warn("Print
33333333333333333333333");
NORM.debug("Print
44444444444444444444");
NORM.info("Print
55555555555555555555");
NORM.debug("Print
66666666666666666666");
}
public void
testMethod2()
{
DEV.error("In test method 2 error
1111");
DEV.debug("In test method 2 debug mesg
222");
DEV.info("In test method 2 info
3333");
DEV.warn("In test method 2 warn
4444");
DEV.info("In test method 2 info
5555");
DEV.debug("In test method 2 debug
6666");
DEV.error("In test method 2 error
7777");
}
public void testMethod3(String
mesg)
{
}
static void init(String configFile)
{
PropertyConfigurator.configure(configFile);
}
public
static void main(String ar[])
{
LogTester lt = new
LogTester(ar[0]);
//
lt.init(ar[0]);
lt.testMethod1();
lt.testMethod2();
}
}
2) Config File :
log4j.rootCategory=ERROR , f
log4j.appender.f=org.apache.log4j.FileAppender
log4j.appender.f.File=System.out
#log4j.appender.f=org.apache.log4j.RollingFileAppender
log4j.appender.f.MaxFileSize=10MB
log4j.appender.f.MaxBackupIndex=3
log4j.appender.f.layout=org.apache.log4j.TTCCLayout
log4j.appender.f.layout.ContextPrinting=enabled
log4j.appender.f.layout.DateFormat=ISO8601
log4j.appender.f.File=tester.log
log4j.appender.f.Append=false
# Root category set to DEBUG using the A2 appender defined
above.
#log4j.rootCategory=INFO, f
# Create two non-root categories, one for normal running - NORM
#
and one for development logging - DEV
log4j.category.NORM=ERROR,
f
log4j.additivity.NORM=false
log4j.category.DEV=DEBUG,
f
log4j.additivity.DEV=false
Regards,
Anand. |
