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From "Fabien Modoux" <fab...@voicemate.com>
Subject RE: Initialization Question
Date Thu, 21 Nov 2002 19:15:00 GMT
Hello,

I have just started using log4j's xml-based configuration
and though it supports substitution for system properties,
I have not found anything about defining generic variables 
that can be referenced in the configuration file.

When using PropertyConfigurator I found this very convenient 
and Ant has this feature in its xml build file. Has anyone
experience this and found a workaround for it? Is there any
reason this was not added or is it planned for future releases?

Thank you in advance for your time.

Fabien 

---------------------------------------------      
Fabien Modoux,
Voicemate - http://www.voicemate.com



> -----Original Message-----
> From: Thomas Muller [mailto:ttm@online.no] 
> Sent: Thursday, November 21, 2002 5:39 AM
> To: Log4J Users List
> Subject: RE: Initialization Question
> 
> 
> Log4j has supported system properties interpolation in XML/properties
> configuration files at least since I started using it (almost 
> two years
> ago).
> 
> Just add the variables to system properties before Log4j 
> fires up, e.g. with
> the -D option to the VM.
> 
> --
> 
> Thomas
> 
> | -----Original Message-----
> | From: Michael Rimov [mailto:rimovm@centercomp.com]
> | Sent: 21 November 2002 09:52
> | To: log4j-user@jakarta.apache.org
> | Subject: Initialization Question
> |
> |
> | Hey all,
> |
> | A quick question.
> |
> | We've been using Log4j for the Expresso project since 
> before it moved to
> | Jakarta, and it has been extremely faithful.  I've been 
> working on how to
> | better set up xml configuration with log4j since DOM 
> configuration has
> | obviously matured greatly since we first dealt with it. :)
> |
> | The only reason left for using a custom configurator AFAICT 
> is because we
> | expand various properties in the DOM configuration.  For example,
> | we define
> | a LOG_DIR property that my configuration loader expands 
> with our desired
> | values.
> |
> | However, I would LOVE to see our own custom configurator 
> done away with
> | alltogether.  I realized that when installing JBoss on my 
> system, that I
> | never had to modify the log4j.xml file so that it starting 
> logging in the
> | right location, so I took a look at this and found:
> |
> | <appender name="FILE"
> | class="org.jboss.logging.appender.DailyRollingFileAppender">
> | <param name="File" value="${jboss.server.home.dir}/log/server.log"/>
> |                            ^^^^^^^^^^^^^^^^^^^^^^^
> |
> | .....
> |
> | Does log4j now support 'ANT-like' properties expansions 
> like that listed
> | above where I can set Java properties and have it expanded 
> properly in
> | DOMConfigurator or is JBoss' custom 
> DailyRollingFileAppender doing this??
> |
> | If log4j DOESN'T do it already, may I ask for it to be put 
> on the feature
> | request list? ;)
> |
> | Thanks for your time in advance!
> |                                                  -Mike
> |
> |
> |
> | --
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