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From "Moynihan, Edward" <EMoyni...@russellmellon.com>
Subject RE: Logging best practices?
Date Tue, 07 Dec 2004 16:06:13 GMT
   While I understand and appreciate your comments, I unfortunately have to work within the
framework that I outlined.  

   To summarize, when I create a WAR file, it must contain the difference logging levels for
all managed regions.  In this case, those regions are Test, QA and Prod.  I am working within
the application server administrators policy and there policy states that one build will be
performed to Test.  That build will be moved in its entirity to QA.  The files in QA will
be moved in their entirity to Prod.  I do not have the opportunity to build a release specific
to QA or to Prod.

   To know what region we are working with, the application server is started up with a system
property that we can interrogate.  So with that information, is there are a way that I can
easily implement logging specific to regions?

   Someone on the Spring Framework board suggested the following;

     "I think that log4j also allows system property substitution in its properties files
so you could have something like:

      log4j.rootCategory=${region.logLevel}, A1

      And then set region.logLevel as a system property."


-----Original Message-----
From: Shapira, Yoav [mailto:Yoav.Shapira@mpi.com]
Sent: Tuesday, December 07, 2004 9:39 AM
To: Logging General
Subject: RE: Logging best practices?

You're asking for best practices, right?

>This is fine and has been working for us. However, now we are moving
>managed regions, which equate to a test, qa and prod regions. The
>now becomes a question of managing the logging level depending on what
>region we are in.
>We do not have the ability to change the application property files
once it
>moves into Test and all files from Test get moved up to QA. All files
>QA eventually move up to Prod. So, as you can see, if we turn on
logging in
>Test, then that logging will be on in Prod, which we do not want.

This is far from a best practice.  It is expected that code and tests
remain the same across environments, but configuration is subject to

You could consider programmatic configuration that takes into account
the environment, but the best solution is to have a different log4j
configuration file for each environment to fit your needs for that
environment.  You can have your build script fill in relevant things
automatically by using Ant filter tokens, for example.

Yoav Shapira http://www.yoavshapira.com

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