[slf4j-user] Per Web App logging

[Ceki Gülcü]

Hi Amir,

Is the Log4JContextualRepositorySelector class yours?

At 09:55 PM 11/20/2006, you wrote:
>Hi Ceki
>
>Thanks for the quick reply.
>Here are my answers:
>
> >If you use the JNDI-based repository selector, you can place a single
> >log4j.jar in the containers shared class loader. I am a little surprised
> >that you need to copy log4j.jar in each web-app. Can you please elaborate?
>
>Here is the URL we used to configure the RepositorySelector.
>http://wiki.jboss.org/wiki/Wiki.jsp?page=Log4jRepositorySelector
>We have about 10 web apps running on JBoss AS and the above solution works.
>Each web app has its own WEB-INF/lib/log4j.jar and WEB-INF/log4j.xml...
>Also, each application has a class that implements ServletContextListener.
>
>public final class MyWebAppContextListener implements ServletContextListener
>{
>
>     private ServletContext context = null;
>     // we cannot use Logger.getLogger until we initialize it...
>     private static Logger  log;
>
>...
>...
>...
>
>In this class we call (in contextInitialized() method):
>
>         this.context.log("Initializing Log4J...");
>         // Before using Log4J logging system, we must initialize it by
>adding
>         // the webapp specific configuration to the repository.
>         Log4JContextualRepositorySelector.addToRepository(pConfigFilePath);
>         // note that we can't call Logger.getLogger() until
>         // Log4JContextualRepositorySelector.addToRepository() is called.
>         // For all other classes in the webapp, you can call
>Logger.getLogger()
>         // at any time.
>         log = Logger.getLogger(FindADocContextListener.class);
>
>That is it....
>However this fails if we remove log4j.jar from WEB-INF/lib...
>
>
>I do apologize if this question is gettting off topic
>
>Amir
>
>
>
>
>
>
>
>-----Original Message-----
>From: user-bounces at slf4j.org [mailto:user-bounces at slf4j.org] On Behalf Of
>Ceki Gülcü
>Sent: Monday, November 20, 2006 3:43 PM
>To: User list for the slf4j project
>Subject: Re: [slf4j-user] Per Web App logging
>
>Hi Amir,
>
>At 09:32 PM 11/20/2006, Amir Mistric wrote:
> >Hello Everyone
> >
> >My company would like to try SLF4J as a replacement for Log4J.
> >Currently we use JBoss AS 4.x and the problem we had was that we could not
> >configure logging "per web application".
> >We ended up using RepositorySelector trick in order to be able to have a
> >separate log4j.xml in every web application deployed.
> >This approach, however, requires each web app to have a copy of log4j.jar
> >in its WEB-INF/lib......
>
>If you use the JNDI-based repository selector, you can place a single
>log4j.jar in the containers shared class loader. I am a little surprised
>that you need to copy log4j.jar in each web-app. Can you please elaborate?
>
> >Recently we decided to create a shared library repository for all web apps
> >we have.
> >While this approach has reduced the "baggage" each web app had in its
> >WEB-INF/lib we still have to use log4j.jar ....
> >
> >Our goal is simple. Have every web application running on the same app
> >server have its own logging config file but share the single JAR (or jars).
>
>Not yet, but it's core feature planned in one of the next releases of
>logback.
>
> >Can SLF4J accomplish this (using built in logback classic) for us?
>
>No, SLF4J is just a front for logback/jul/log4j/jcl. While SLF4J cannot
>accomplish what you are asking, log4j can do so, and logback will in the
>near future.
>
> >Thanks
> >Amir
>
>--
>Ceki Gülcü
>Logback: The reliable, generic, fast and flexible logging framework for
>Java.
>http://logback.qos.ch
>
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-- 
Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch