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There are some other methods available, like using ServletContext.getContextPath() to get the context name of your web application and locate some resources accordingly, or to define <context-param> elements in WEB-INF/web.xml file of your web application and then set the values for them in Tomcat context file (META-INF/context.xml). See http://tomcat.apache.org/tomcat-7.0-doc/config/context.html .
How do I
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To have Tomcat use log4j universally, place both log4j.jar and the Jakarta commons-logging.jar into the $TOMCAT_HOME/common/lib directory. Create your log4j properties file as $TOMCAT_HOME/common/classes/log4j.properties and configure the root logger. Here is the basic log4j.properties that I used to do this myself:
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log4j.rootLogger=info, R
log4j.appender.R=org.apache.log4j.ConsoleAppender
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%-5p %-30.30c{1} %x - %m%n
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If you only need to use log4j in your own web app, just include log4j (and any log4j properties file) in your WAR file.
How do I configure Tomcat Connectors?
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