title: log4j: package-specific logging
body: <p>How can I set log4j to log to a different file according to package name?</p>
  
  <p>for example:</p>
  
  <pre><code>com.myname.fred logs to fred.log
  com.myname.derek logs to derek.log
  </code></pre>
  
  <p>I am using the properties file config format. At present it's set up for the server, and I want to leave that alone and add stuff for my logging to it.</p>
  
  <p>Here's what the properties file looks like:</p>
  
  <pre><code>##
  ## Licensed to the Apache Software Foundation (ASF) under one or more
  ## contributor license agreements.  See the NOTICE file distributed with
  ## this work for additional information regarding copyright ownership.
  ## The ASF licenses this file to You under the Apache License, Version 2.0
  ## (the "License"); you may not use this file except in compliance with
  ## the License.  You may obtain a copy of the License at
  ##
  ##    http://www.apache.org/licenses/LICENSE-2.0
  ##
  ## Unless required by applicable law or agreed to in writing, software
  ## distributed under the License is distributed on an "AS IS" BASIS,
  ## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ## See the License for the specific language governing permissions and
  ## limitations under the License.
  ##
  ## $Rev: 564818 $ $Date: 2007-08-10 22:28:29 -0400 (Fri, 10 Aug 2007) $
  ##
  
  log4j.rootLogger=INFO, CONSOLE, FILE
  
  log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
  log4j.appender.CONSOLE.Threshold=${org.apache.geronimo.log.ConsoleLogLevel}
  log4j.appender.CONSOLE.Target=System.out
  log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
  log4j.appender.CONSOLE.layout.ConversionPattern=%d{ABSOLUTE} %-5p [%c{1}] %m%n
  
  log4j.appender.FILE=org.apache.log4j.RollingFileAppender
  log4j.appender.FILE.Threshold=TRACE
  log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
  log4j.appender.FILE.layout.ConversionPattern=%d{ABSOLUTE} %-5p [%c{1}] %m%n
  
  #
  # Note, changing log4j.appender.FILE.append=false will result in logs being
  # overwritten without archiving the previous version of the log.
  #
  log4j.appender.FILE.append=true
  log4j.appender.FILE.file=${org.apache.geronimo.server.dir}/var/log/geronimo.log
  log4j.appender.FILE.bufferedIO=false
  log4j.appender.FILE.maxBackupIndex=3
  log4j.appender.FILE.maxFileSize=10MB
  
  #
  # Example: enable trace logging from CONSOLE appender
  #
  #log4j.appender.CONSOLE.Threshold=TRACE#org.apache.geronimo.system.logging.log4j.XLevel
  
  #
  # Example: enable trace messages from foo.bar category
  #
  #log4j.logger.foo.bar=TRACE#org.apache.geronimo.system.logging.log4j.XLevel
  
  # Geronimo
  #This will help find connection leak problems
  #log4j.logger.org.apache.geronimo.connector.outbound=TRACE#org.apache.geronimo.system.logging.log4j.XLevel
  log4j.logger.org.apache.geronimo.system.logging.log4j.Log4jService=INFO
  
  #### Eliminate any INFO level output during normal operation -- except the really relevant stuff ####
  #    We can change the Geronimo code to avoid this, but we have to just adjust the log levels for
  #    any third-party libraries.
  log4j.logger.org.apache.commons.digester=ERROR
  log4j.logger.org.apache.jasper.compiler.SmapUtil=WARN
  
  # ActiveMQ
  log4j.logger.org.apache.activemq=WARN
  log4j.logger.org.apache.activemq.broker.jmx.ManagementContext=ERROR
  
  # Don't need so much info on every web page that's rendered
  log4j.logger.org.mortbay=INFO
  log4j.logger.org.apache.pluto=INFO
  log4j.logger.org.apache.jasper=INFO
  
  # Various Jetty startup/shutdown output
  log4j.logger.org.mortbay.http.HttpServer=WARN
  log4j.logger.org.mortbay.http.SocketListener=WARN
  log4j.logger.org.mortbay.http.ajp.AJP13Listener=WARN
  log4j.logger.org.mortbay.util.Container=WARN
  log4j.logger.org.mortbay.util.Credential=WARN
  log4j.logger.org.mortbay.util.ThreadedServer=WARN
  log4j.logger.org.mortbay.jetty.servlet.WebApplicationContext=WARN
  log4j.logger.org.mortbay.jetty.context=WARN
  
  # Various Tomcat startup output
  log4j.logger.org.apache.catalina.realm.JAASRealm=WARN
  log4j.logger.org.apache.catalina.realm.RealmBase=WARN
  log4j.logger.org.apache.catalina.loader.WebappLoader=WARN
  log4j.logger.org.apache.catalina.startup.Embedded=WARN
  log4j.logger.org.apache.catalina.core.StandardEngine=WARN
  log4j.logger.org.apache.catalina.core.StandardHost=WARN
  log4j.logger.org.apache.jk.common.ChannelSocket=WARN
  log4j.logger.org.apache.jk.server.JkMain=WARN
  log4j.logger.org.apache.coyote.http11.Http11BaseProtocol=WARN
  log4j.logger.org.apache.coyote.http11.Http11Protocol=WARN
  log4j.logger.org.apache.catalina.core.ContainerBase=WARN
  log4j.logger.org.apache.catalina.core.StandardContext=WARN
  log4j.logger.org.apache.tomcat.util.net.SSLImplementation=WARN
  
  # myfaces startup output
  log4j.logger.org.apache.myfaces.renderkit.html.HtmlRenderKitImpl=WARN
  log4j.logger.org.apache.myfaces.config.FacesConfigurator=WARN
  log4j.logger.org.apache.myfaces.webapp.StartupServletContextListener=WARN
  log4j.logger.org.apache.myfaces.webapp.StartupServletContextListener=WARN
  
  # emits a spurious warn about null locale during startup of webapps
  log4j.logger.org.apache.myfaces.shared_impl.util.LocaleUtils=ERROR
  
  # Emits a spurious WARN during startup on /some-path/* security mappings
  log4j.logger.org.apache.catalina.deploy.SecurityCollection=ERROR
  
  # Prints the MBean Server ID
  log4j.logger.javax.management.MBeanServerFactory=WARN
  
  # Prints the RMI connection URL
  log4j.logger.javax.management.remote.rmi.RMIConnectorServer=WARN
  log4j.logger.javax.management.remote.JMXServiceURL=WARN
  
  # Prints various stuff during startup
  log4j.logger.org.apache.juddi.registry.RegistryServlet=WARN
  
  # Prints various stuff when the portal is used
  log4j.logger.org.apache.pluto.portalImpl.Servlet=WARN
  
  # Prints stuff for AJAX calls
  log4j.logger.uk.ltd.getahead.dwr.impl.DefaultConfiguration=WARN
  log4j.logger.uk.ltd.getahead.dwr.impl.ExecuteQuery=WARN
  log4j.logger.uk.ltd.getahead.dwr.util.Logger=WARN
  </code></pre>