You first talk about ServletContext.log(), but then talk about log4j loggers in your app. These are two completely separate things. Which were you focusing on? With your setup, it it makes sense that ServletContext.log() messages are going to catalina.log. However, if you have log4j.jar in WEB-INF/lib and your application log4j logging is going to catalina.log, then your setup is different than what you describe here. There is quite simply no way that can happen given the setup you've described. They should go to "bar.log" since that's the only appender that your application's log4j configuration can see. In any case, you don't need a separate log4j.jar in WEB-INF/lib for ServletContext.log() messages to go to app-specific log files. Just define those in your log4j.properties just like you have defined the host logger. Here's my setup for Log4j-1.2.9 in common/classes.log4j.properties (You can use log4j.xml when using Log4j-1.3 because it uses a the new JoranConfigurator which doesn't define a log4j.dtd. The current DOMConfigurator's dtd defines the <logger> "name" attribute as an ID and the host and context logger names that Tomcat uses characters not allowed in attributes of type "id")....
log4j.appender.A1=org.apache.log4j.ConsoleAppender log4j.appender.A1.layout=org.apache.log4j.PatternLayout log4j.appender.A1.layout.ConversionPattern=%-5p[%-8.8t]: %39.39c %-6r - %m%n
log4j.appender.LOCALHOST=org.apache.log4j.RollingFileAppender
log4j.appender.LOCALHOST.File=${catalina.home}/logs/localhost.log
log4j.appender.LOCALHOST.MaxFileSize=1000KB
log4j.appender.LOCALHOST.MaxBackupIndex=1
log4j.appender.LOCALHOST.layout=org.apache.log4j.PatternLayout
log4j.appender.LOCALHOST.layout.ConversionPattern=%-5p[%-8.8t]: %39.39c %-6r - %m%n
log4j.appender.MYAPP=org.apache.log4j.DailyRollingFileAppender
log4j.appender.MYAPP.File=${catalina.base}/logs/localhost_myapp.log
log4j.appender.MYAPP.DatePattern='.'yyyy-MM-dd
log4j.appender.MYAPP.layout=org.apache.log4j.PatternLayout
log4j.appender.MYAPP.layout.ConversionPattern=%c{1} %-6r - %m%nlog4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/myapp]=INFO, MYAPP
log4j.additivity.org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/myapp]=false
log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhost]=INFO, LOCALHOST
log4j.additivity.org.apache.catalina.core.ContainerBase.[Catalina].[localhost]=false
log4j.rootLogger=INFO, A1
Note that I use a ConsoleAppender because when I run from the command line, I want the output going to the command window. When I use a service, the service captures the console output and writes it to a log file named "stdout.log". This is why I don't specify the file. It is done for me (and rolled daily for me). Also note the use of additivity on the host and context loggers. This is to avoid double logging to the appender configured by the root logger and the one specifically configured for the host/context log.
BTW, you don't need commons-logging in your webapp. It is only Tomcat that needs it, so just put it in common/lib, not WEB-INF/lib. You can continue to put log4j.jar in both places if you desire. Otherwise, you can also use a repository selector to separate webapp logging with a single log4j.jar in common/lib. This makes more sense to start doing with Log4j-1.3, though, using the ContextJNDISelector. You get the same effect by having log4j.jar in WEB-INF/lib since the classloader isolation will, effectively, create logging isolation per webapp.
Jake
At 06:18 PM 3/1/2005 -0500, you wrote:
>I'm having trouble approximating the earlier tomcat per-context
><Logger> functionality using log4j under tomcat-5.5. Basically, I
>would like to have one file coming out under $CATALINA_BASE/logs/ per
>web application context. This appears to be no longer possible through
>ServletContext.log(). So I tried using log4j:
>
>1) put log4j.jar, commons-logging.jar in common/lib AND
>webapps/*/WEB-INF/lib
>2) put log4j.properties in common/classes AND webapps/*/WEB-INF/classes
>
>However, I can't seem to find the right combination of log4j.properties
>lines, or maybe I'm trying something impossible. (I can't find good
>docs on the uses of log4j.properties when used inside the hierarchical
>classloading context that tomcat provides.) What keeps happening is
>that the webapp's log statements keep going into the global tomcat log.
> Would I be better off with JDK logging instead?
>
>common/classes/log4j.properties
>-------------------
>log4j.rootLogger info, R
>log4j.appender.R org.apache.log4j.RollingFileAppender
>log4j.appender.R.File ${catalina.base}/logs/tomcat.log
>log4j.appender.R.MaxFileSize 10MB
>log4j.appender.R.MaxBackupIndex 10
>log4j.appender.R.layout org.apache.log4j.PatternLayout
>
>log4j.appender.R.layout.ConversionPattern %p %t %c - %m%n
>
>#log4j.logger.org.apache.catalina info, R
>#log4j.logger.org.apache.catalina.session info, R
>#log4j.logger.org.apache.catalina.session.ManagerBase info, R
>
>log4j.logger.org.apache.catalina.core.ContainerBase.[Catalina].[localhos
>t]=info, R
>-------------------
>
>webapp/*/classes/log4j.properties
>-------------------
># is this necessary? tried with and without...
>log4j.rootLogger info, A1
>
>log4j.category.com.foo , A1
>log4j.appender.A1 org.apache.log4j.DailyRollingFileAppender
>log4j.appender.A1.File ${catalina.base}/logs/bar.log
>log4j.appender.A1.MaxFileSize 10MB
>
>log4j.appender.A1.MaxBackupIndex 10
>log4j.appender.A1.layout org.apache.log4j.PatternLayout
>log4j.appender.A1.Append true
>
>log4j.appender.A1.layout.ConversionPattern %p %t %c - %m%n
>
>log4j.logger.com.foo info, A1
>-------------------
>
>Code in webapp:
>-------------------
>Logger logger = Logger.getLogger("com.foo");
>logger.info("bar");
>-------------------
>
>Any help appreciated..
>
>
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