We have pretty much that exact environment, though we are keeping separate log files
for the web app and the EJB app.
We put our log4j config file (which specifies both appenders and category hierarchies
for us) in an "etc" directory within the .ear file. We put log4j.jar in a "lib"
directory within the .ear file. To get those things in the classpath, we specify a
"Class-Path:" attribute in our EJB .jar file's manifest:
Class-Path: lib/log4j.jar etc/
WebLogic's classloader setup for an .ear-file deployment ensures that the log4j stuff
is in the classpath for both the EJBs and the web app. See:
http://e-docs.bea.com/wls/docs61/programming/packaging.html
As far as threading, singletons, etc., we've encountered no problems in our app. We
have a couple of classes to which we provide singleton access in the EJB container. We
don't use any non-final statics for obvious reasons. We also have a thread-local class
which we use to provide central access to a few thread-local items.
Hope that helps,
Donnie
>>> [EMAIL PROTECTED] 02/05/02 01:27PM >>>
Environment: WebLogic 6.1 SP1, Struts 1.0.1, and Log4j 1.1.3. Application is deployed
as a single .ear file in a single WebLogic instance. log4j.jar is in the EJB
classloader's classpath, not the WebLogic classpath nor the web app's classloader
classpath.
Scenario: I want to be able to use Log4j in JSP custom tag handlers, servlets (Struts
action classes to be exact) and EJB's.
What I have done so far: used a startup servlet to do Log4j configuration for
servlets logging. The config file is under the web app's WEB/INF directory.
Separately, I used a factory class with static methods to configure Log4j for EJB
logging, and for this I have to use a replicate of the configuration file but outside
the .ear file. I use a RFAppender for logging output.
What I want to achieve: configure Log4j once for the WebLogic instance, not for EJB's
and servlets separately, and I want to put the configuration file in the .ear file,
not outside it.
Other general questions: do you see any major problems with regard to threading,
singleton, and static classes in a EJB container environment?
Any suggestion is greatly welcome.
Eric Ma
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