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From "Ran//-\\mir " <rao...@myway.com>
Subject Re: Problem with Log4j (Configuration)
Date Wed, 22 Dec 2004 05:35:01 GMT

thanks Jake, its working...........:)

but whats the detailed solution if i required two different configuration files.........




 --- On Sat 12/18, Jacob Kjome < hoju@visi.com > wrote:
From: Jacob Kjome [mailto: hoju@visi.com]
To: log4j-user@logging.apache.org
Date: Sat, 18 Dec 2004 11:31:45 -0600
Subject: Re: Problem with Log4j (Configuration)

At 05:20 PM 12/18/2004 +0100, you wrote:<br> ><br> >Amir,<br> ><br>
>Are A.txt and B.txt the configuration files or the files where logging<br> >output
goes?<br> ><br><br>I'm pretty sure he means that the .txt files are his
log files and since he <br>has two separate configurations, he expects appA's output
to go to one file <br>(as it was configured in his appA config file) and he expects
appB's output <br>to go to separate file (as it is configured in his appB config file).
 The <br>problem is that there is only one config [file] per logger <br>repository.
 When he says "appA" and "appB", he means two jar files in the <br>same application.<br><br>The
answer to this is that the approach is flawed.  The way I interpret <br>this is that
ApplicationA.jar and ApplicationB.jar both have a log4j config <br>file in their roots.
 This is a bad practice as someone else may use, for <br>instance, ApplicationA.jar
in their app but not want to have <br>ApplicationA.jar defining their logger configuration.
 The problem is <br>thinking that configuration is happening per/library.  It actually
happens <br>per logger repository which, by default, is essentially per visible <br>classloader
hierarchy.  If a repository selector is used, the configuration <br>happens per whatever
criteria the selector uses as a demarcation of logger <br>repositories.  This can add
complexity which is necessary at times, but <br>probably not here.<br><br>Because
of this, one should not distribute config files in jars.  Logging <br>is for the end
user, not the creator of the library.  Remove the config <br>files from the libraries
and use a single config file per/application.  At <br>this point, it is easy to send
the output of the two libraries (with <br>distinct package names) to separate log files...<br><br><appender
name="File1" class="org.apache.log4j.FileAppender"><br>     <param name="File"
value="file1.log" /><br></appender><br><appender name="File2" class="org.apache.log4j.FileAppender"><br>
    <param name="File" value="file2.log" /><br></appender><br><br><logger
name="com.mycompany.librarya" additivity="false"><br>     <level value="debug"/><br>
    <appender-ref ref="File1"/><br></logger><br><br><logger
name="com.mycompany.libraryb" additivity="false"><br>     <level value="debug"/><br>
    <appender-ref ref="File2"/><br></logger><br><br><root><br>
   <level value="warn"/><br>    <appender-ref ref="Console"/><br></root><br><br><br>I
hope that answers the question.<br><br>Jake<br><br> >At 06:13 AM
12/17/2004, Ran//-\\mir wrote:<br> ><br> >>Apologies are mine if this
issue is discussed already.<br> >>I have two different applications i-e two separate
jar files<br> >>(ApplicationA.jar and ApplicationB.jar).<br> >>Both
use log4j for logging to separate files (A.txt and B.txt).<br> >>Now the scenario
is<br> >>ApplicationB uses ApplicationA jar file. I have placed ApplicationA.jar<br>
>>and log4j.jar in WEB_INF/lib folder of ApplicationB. When ApplicationB<br> >>runs,
I expect to get logs in different files but unfortunately this does<br> >>not
happen. ApplicationA makes some logging in B.txt and ApplicationB in<br> >>A.txt.
Though both are using different configuration files.<br> >>Is this normal? What
is the solution to the problem?<br> >>Thanking in advance.<br> >>Amir<br>
><br> >--<br> >Ceki Gülcü<br> ><br> >   The complete
log4j manual: http://qos.ch/log4j/<br> ><br> ><br> ><br>
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