If the webapps are configured to use child-first, or parent-last, classloading and log4j.jar is in WEB-INF/lib and log4j.xml is in WEB-INF/classes (or you specify the config path yourself using the Spring configuration utility), then logging should be separated.
Shared libraries located outside of WEB-INF/lib (such as in APP-INF/lib under Weblogic) can be problematic since they'll have dependency on Log4j and won't be able to reference it under each webapp's WEB-INF/lib.
The other option is a repository selector, but that entails some more complication. There's documentation for it in the logging-log4j wiki [1]. You may still end up with problems when shared libraries log using static loggers, though, since they will be tied to the configuration of the first app that accesses them.
[1] http://wiki.apache.org/logging-log4j/AppContainerLogging Jake On Tue, 21 Jun 2011 18:03:20 +0300 Melih U. Ünsal <melihun...@gmail.com> wrote:
My ear project consists of two war applications. i want to create logs individually for every war. i mean every war projects must create its own logs. But, because of they run in the same jvm, i am not sure whether it is possible or not. how can i handle this issue? By the way, the war applications are spring projects. i created two log4j config files (log4j_app1.xml and log4j_app2.xml) and instantiated them in the applicationcontexts but it did not solve the problem. WAR_APP1 applcaitoncontext.xml : <bean id="log4jInitialization" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean"> <property name="targetClass" value="org.springframework.util.Log4jConfigurer" /> <property name="targetMethod" value="initLogging" /> <property name="arguments"> <list> <value>/config/log4j_app1.xml</value> </list> </property> </bean> WAR_APP2 applcaitoncontext.xml : <bean id="log4jInitialization" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean"> <property name="targetClass" value="org.springframework.util.Log4jConfigurer" /> <property name="targetMethod" value="initLogging" /> <property name="arguments"> <list> <value>/config/log4j_app2.xml</value> </list> </property> </bean> log4j_app1.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE log4j:configuration SYSTEM " http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/xml/doc-files/log4j.dtd "> <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/";> <appender name="appender" class="org.apache.log4j.DailyRollingFileAppender"> <param name="DatePattern" value="'.'yyyy-MM-dd"/> <param name="File" value="/logs/app1/app1.log"/> <param name="Append" value="true"/> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d [%t] %p - %m%n"/> </layout> </appender> <appender name="console" class="org.apache.log4j.ConsoleAppender"> <param name="Target" value="System.out"/> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d - %5p %c{1} - %m%n"/> </layout> </appender> <root> <priority value="info"/> <appender-ref ref="appender"/> <appender-ref ref="console"/> </root> </log4j:configuration> log4j_app2.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE log4j:configuration SYSTEM " http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/xml/doc-files/log4j.dtd "> <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/";> <appender name="appender_ui" class="org.apache.log4j.DailyRollingFileAppender"> <param name="DatePattern" value="'.'yyyy-MM-dd"/> <param name="File" value="/logs/app2/app2.log"/> <param name="Append" value="true"/> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d [%t] %p - %m%n"/> </layout> </appender> <appender name="console_ui" class="org.apache.log4j.ConsoleAppender"> <param name="Target" value="System.out"/> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d - %5p %c{1} - %m%n"/> </layout> </appender> <root> <priority value="info"/> <appender-ref ref="appender_ui"/> <appender-ref ref="console_ui"/> </root> </log4j:configuration>
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