Hi Patrick,
So, you've verified that the env. scope works to look up OS properties in
Log4j? If this works, I guess I stand corrected on my previous statement where
I said that this sort of thing wasn't recognized as anything special by Log4j.
Or is it that the System class loads up all existing OS properties using the
name of the OS property prefixed by env., so that it isn't anything special
that Log4j is doing, but just a standard Java feature?
Farzad, can you post a message back here stating whether the syntax
${env.MY_PROPERTY} works to pick up your OS properties?
Jake
Quoting Patrick Wyss [EMAIL PROTECTED]:
farzad,
as jake already pointed out, there are 2 solutions to your problem:
1. specify a system property by -D as described in the mail from 21. August
2006 22:17
or
(and i guess this is what you are looking for)
2. if you want to access the OS environment property then you have to access
it with ${env.MY_PROPERTY}
so on windows you would do
SET MY_PROPERTY=c:\my_log_directory
and in your log4j.xml you would access it:
param name=File value=${env.MY_PROPERTY}/server.log/
patrick
-Ursprüngliche Nachricht-
Von: Jacob Kjome [mailto:[EMAIL PROTECTED]
Gesendet: Montag, 21. August 2006 22:17
An: Log4J Users List
Betreff: RE: using variables in log4j xml file
Well, System properties are not the same as OS environment
properties. If you
want an OS environment property to exist in the JVM, you will
have to set it
via the -D parameter on the command line, such as (on windows)
java -Dlog.dir=%LOG_DIR% MyClass
Then, in your log4j.xml file...
param name=File
value=${log.dir}/jboss/${jboss.server.name}/server.log/
Jake
Quoting Farzad Kohantorabi [EMAIL PROTECTED]:
Jake,
Thanks for your sharp response. What I need to do is to set
a variable
outside the Log4j.xml file and have all the log redirected
to the path
specified in that variable. By environment variable I meant
what you set
in you windows property window, like PATH and CLASS_PATH.
Well, I have the following in my log4j.xml file:
param name=File
value=${LOG_DIR}/jboss/${jboss.server.name}/server.log/
And I tried to set the LOG_DIR both in the windows
properties window and
-D java option but they didn't seem to work. Do you have
any idea why?
Farzad-
-Original Message-
From: Jacob Kjome [mailto:[EMAIL PROTECTED]
Sent: Monday, August 21, 2006 3:41 PM
To: Log4J Users List
Subject: Re: using variables in log4j xml file
When you say environment variables, do you mean System (JVM-wide)
properties?
If so, then you just reference them as ${mysyspropname}. I
imagine that
JBoss
sets some system properties and that is probably what you are seeing
referenced
in the log4j config files you speak of. The example you
provide where
the
property name is prefixed with env is invalid. There's
no specific
env
scope, or any scope for that matter, used by Log4j to resolve
properties.
Jake
Quoting Farzad Kohantorabi [EMAIL PROTECTED]:
Hi group,
I am not sure if it is the right place to ask this
question but I have
seen usage of jboss variables in the log4j.xml file. However, I am
wondering if it is possible to use environment variables
in the config
file, something like ${env.LOG_DIR}.
Thanks,
Farzad-
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