20 messages in org.apache.logging.log4j-userRE: Separate log file per servlet
FromSent OnAttachments
Horry, Adam JJun 11, 2004 10:05 am 
James StaufferJun 11, 2004 10:20 am 
Shapira, YoavJun 11, 2004 10:23 am 
Horry, Adam JJun 11, 2004 10:29 am 
Horry, Adam JJun 11, 2004 10:33 am 
Lutz MichaelJun 11, 2004 10:33 am 
Shapira, YoavJun 11, 2004 10:58 am 
James StaufferJun 11, 2004 11:02 am 
Horry, Adam JJun 11, 2004 11:48 am 
James StaufferJun 11, 2004 11:50 am 
Ceki GülcüJun 11, 2004 12:08 pm 
Scott DeboyJun 11, 2004 12:13 pm 
Horry, Adam JJun 11, 2004 1:29 pm 
Horry, Adam JJun 11, 2004 1:37 pm 
Horry, Adam JJun 11, 2004 1:40 pm 
James StaufferJun 11, 2004 1:42 pm 
Ceki GülcüJun 11, 2004 1:49 pm 
Scott DeboyJun 11, 2004 1:50 pm 
Horry, Adam JJun 11, 2004 2:10 pm 
Ceki GülcüJun 11, 2004 2:16 pm 
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Subject:RE: Separate log file per servletActions...
From:Lutz Michael (mich@siemens.com)
Date:Jun 11, 2004 10:33:59 am
List:org.apache.logging.log4j-user

Yoav,

I should know this but may I also ask ...

1) What is the reason for setting additivity to false in this scenario 2) does additivity need to be set to false for each appender in this scenario, or only the first?

Thanks Yoav!

Mike

-----Original Message----- From: Shapira, Yoav [mailto:Yoav@mpi.com] Sent: Friday, June 11, 2004 1:24 PM To: Log4J Users List Subject: RE: Separate log file per servlet

Hi, Here's one cleaner way, doing nearly everything in the configuration file:

log4j.properties: log4j.appender.foo.bar.appender = ... log4j.logger.foo.bar = foo.bar.appender, DEBUG log4j.logger.foo.bar.additivity = false

log4j.appender.foo.baz.appender = ... log4j.logger.foo.baz = foo.baz.appender, DEBUG ...

Configure log4j once via automatic configuration or whatever mechanism you desire.

Other approaches exist as well, nearly everything would be cleaner than the approach in your email: you don't want to configure (andWatch!) log4j once from each servlet.

Yoav Shapira Millennium Research Informatics

-----Original Message----- From: Horry, Adam J [mailto:adam@lmco.com] Sent: Friday, June 11, 2004 1:06 PM To: log4@logging.apache.org Subject: Separate log file per servlet

The web server is configured to be one JVM for all the servlets. Numerous people are developing different classes. We want each Servlet to write to its own log.

Class X { ... xLog = getLogger( "DEBUG" ); ... xLog.info( "message" ); ... }

Class ServletY extends HttpServlet { ... xLog = getLogger( "DEBUG" ); ... configureAndWatch( ); ... xLog.info( "message" ); ... someMethod() { new X(); } }

Class ServletZ extends HttpServlet { ... xLog = getLogger( "DEBUG" ); ... configureAndWatch( ); ... xLog.info( "message" ); ... someMethod() { new X(); } ... }

log4j.properties: ... Logger name="DEBUG" Appender A ... Appender A ...

Class A extends DailyRollingFileAppender { String _file = null;

a( ) { super.init(); setFile( "" ); }

setFile( aFile ) { // Throw stack trace to figure out which servlet called you ... // add path and .log to get filename like /tmp/ServletY.log or // /tmp/ServletZ.log _file = "newFile"; } }

Now the problem: When the first servlet comes up, say ServletY, it configures and creates /tmp/ServletY.log. ServletY and X write to the file and everyone is happy. Now the next servlet comes up, say ServletZ. It configures and creates /tmp/ServletX.log. Now everything writes to this log but not the other.

So I guess what I am looking for is how I can I do logging on a servlet basis that writes to a particular log. The various support classes need to call something generic because they do not know which specific servlet called them.

Thanks, Adam

adam@lmco.com

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