First thing the use of classes as category names is a convention. You can
use anything you want to as I added the .user and .system to the end of the
class name.
Second the code in your post looks like it will work.
Here is the config file I used to test the idea.
# Set root category priority to FATAL and its appender to A1.
log4j.rootCategory=FATAL, A1
# A1 is set to be a ConsoleAppender.
log4j.appender.A1=org.apache.log4j.ConsoleAppender
# A1 uses PatternLayout.
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
#category com.bjsscrapbooks.logging.MultipleCategories.user priority INFO and use
appender UserFile
log4j.category.com.bjsscrapbooks.logging.MultipleCategories.user=INFO, UserFile
log4j.additivity.com.bjsscrapbooks.logging.MultipleCategories.user=false
#category com.bjsscrapbooks.logging.MultipleCategories.system priority ERROR and use
appender SystemFile
log4j.category.com.bjsscrapbooks.logging.MultipleCategories.system=ERROR, SystemFile
log4j.additivity.com.bjsscrapbooks.logging.MultipleCategories.system=false
#UserFile appender for user messages
log4j.appender.UserFile=org.apache.log4j.FileAppender
log4j.appender.UserFile.layout=org.apache.log4j.PatternLayout
log4j.appender.UserFile.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
log4j.appender.UserFile.file=user.log
#SystemFile appender for system messages
log4j.appender.SystemFile=org.apache.log4j.FileAppender
log4j.appender.SystemFile.layout=org.apache.log4j.PatternLayout
log4j.appender.SystemFile.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
log4j.appender.SystemFile.file=system.log
I use Category com.bjsscrapbooks.logging.MultipleCategories.user and
com.bjsscrapbooks.logging.MultipleCategories.system I turned additivity
off because only wanted the output to go to the files.
when I run a test program that sends a message to both user and system for
each priority I only get INFO and above in the user file. In the System
file I get ERROR and above.
Mark Russell
PNC
412-768-9603
"Sam Newman"
<sam.newman@stam To: "LOG4J Users Mailing List"
<[EMAIL PROTECTED]>
plets.com> cc:
Subject: Re: Multiple Appenders
07/25/2001 10:07
AM
Please respond
to "LOG4J Users
Mailing List"
Currently I use log4j via an abstracted static class. I have a method
called
warn, which does the following (it is a little aprroximated - don't have
the
code in from of me):
public void warn(Class class, String message) {
Category cat = Category.getInstance(class.getName());
cat.warn(message);
}
The Category and its appenders are created in the static classes
getInstance
method by using a PropertyConfigurator. Now for me to extend this idea to
use system and user warnings, from what your saying I'd do the following:
public void systemWarn(Class class, String message) {
Category cat = Category.getInstance(class.getName()+".system");
cat.warn(message);
}
public void userWarn(Class class, String message) {
Category cat = Category.getInstance(class.getName()+".user");
cat.warn(message);
}
However, I'm unsure how this would work - surely the getInstance method
will
try and find a category for a class (assuming I called userWarn() for a
class in com.bob.MyClass) com.bob.MyClass.user (e.g. a non-existing class).
So when configuring my Category initially using the property file, how
would
I create my Category to match this when getInstance is called?
Sorry if my question doesn't make much sense.....
sam
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: "LOG4J Users Mailing List" <[EMAIL PROTECTED]>
Sent: Wednesday, July 25, 2001 1:31 PM
Subject: Re: Multiple Appenders
>
> How about using two categories
> Category catUser = Category.getInstance(className.class.getName() +
> ".user");
> Category catSystem = Category.getInstance(className.class.getName() +
> ".system");
>
> Then you could set different appenders to the different categories.
> You could log user events like this:
> catUser.info("this is a user message");
> and system events:
> catSystem.info("this is a system event");
>
> my2cents
> Mark Russell
> PNC
> 412-768-9603
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