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tomcat "logging.properties"

 
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handlers = 1catalina.org.apache.juli.FileHandler, 2localhost.org.apache.juli.FileHandler, \
3manager.org.apache.juli.FileHandler, 4admin.org.apache.juli.FileHandler, \
java.util.logging.ConsoleHandler

.handlers = 1catalina.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler

############################################################
# Handler specific properties.
# Describes specific configuration info for Handlers.
############################################################

1catalina.org.apache.juli.FileHandler.level = FINE
1catalina.org.apache.juli.FileHandler.directory = ${catalina.base}/logs
1catalina.org.apache.juli.FileHandler.prefix = catalina.

2localhost.org.apache.juli.FileHandler.level = FINE
2localhost.org.apache.juli.FileHandler.directory = ${catalina.base}/logs
2localhost.org.apache.juli.FileHandler.prefix = localhost.

3manager.org.apache.juli.FileHandler.level = FINE
3manager.org.apache.juli.FileHandler.directory = ${catalina.base}/logs
3manager.org.apache.juli.FileHandler.prefix = manager.

4admin.org.apache.juli.FileHandler.level = FINE
4admin.org.apache.juli.FileHandler.directory = ${catalina.base}/logs
4admin.org.apache.juli.FileHandler.prefix = admin.

java.util.logging.ConsoleHandler.level = FINE
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter


############################################################
# Facility specific properties.
# Provides extra control for each logger.
############################################################

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].level = INFO
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].handlers = \
2localhost.org.apache.juli.FileHandler

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].level = INFO
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].handlers = \
3manager.org.apache.juli.FileHandler

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/admin].level = INFO
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/admin].handlers = \
4admin.org.apache.juli.FileHandler

# For example, set the com.xyz.foo logger to only log SEVERE
# messages:
#org.apache.catalina.startup.ContextConfig.level = FINE
#org.apache.catalina.startup.HostConfig.level = FINE
#org.apache.catalina.session.ManagerBase.level = FINE

This is the sample logging.properties. In this I dont understand the last commented out part. My understading was, say you have a application deployed in abc.efg.Sample.java(servlet),
then to enable logging for this file, I should have the following lines in logging.properties

abc.efg.Sample.handler = 2localhost.org.apache.juli.FileHandler

so all the log messages should go to localhost.log, right?


 
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The docs on Tomcat logging are really confusing to me. They actually refer to logging from Tomcat itself and not the apps deployed in Tomcat. The apps have to define their own logging, and can use whatever logging system they want - juli, log4, commons.logging, or whatever. For log4j, put the log4j.xml or properties file at the root of the WAR's WEB-INF/classes directory. For juli, I think it actually refers back to the logging.properties of whatever JVM is running Tomcat (the JAVA_HOME/lib/logging.properties file). But I'm not certain, and there are override options.

The Tomcat juli logger actually puts out its logs with a datestamp as part of their names for the localhost log.
 
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