Take a look at filters: https://logging.apache.org/log4j/2.x/manual/filters.html
Also probably helpful if you're trying to break it down into multiple files: https://logging.apache.org/log4j/2.x/manual/appenders.html#RoutingAppender On 12 June 2017 at 05:20, M Sazzadul Hoque <sazzad.cse.s...@gmail.com> wrote: > Hello, > > My application has several dependencies, some of which have other > dependencies. I am using Log4j2 for logging and wanted to separate > application logs from dependency logs. > > Below is my log4j2.xml > > <?xml version="1.0" encoding="UTF-8"?> > <Configuration> > <Properties> > <property name="rollSuffix">%d{yyyyMMdd}</property> > <property name="commonPattern">%d %level %class %method - > %msg%n</property> > </Properties> > <Appenders> > <RollingFile name="xLog" > fileName="x.log" > filePattern="x-${rollSuffix}.log" > immediateFlush="true" > > <PatternLayout pattern="${commonPattern}" /> > <Policies> > <TimeBasedTriggeringPolicy interval="1" modulate="true" /> > </Policies> > </RollingFile> > <RollingFile name="yLog" > fileName="y.log" > filePattern="y-${rollSuffix}.log" > immediateFlush="true" > > <PatternLayout pattern="${commonPattern}" /> > <Policies> > <TimeBasedTriggeringPolicy interval="1" modulate="true" /> > </Policies> > </RollingFile> > <RollingFile name="zLog" > fileName="z.log" > filePattern="z-${rollSuffix}.log" > immediateFlush="true" > > <PatternLayout pattern="${commonPattern}" /> > <Policies> > <TimeBasedTriggeringPolicy interval="1" modulate="true" /> > </Policies> > </RollingFile> > <RollingFile name="appLog" > fileName="app.log" > filePattern="app-${rollSuffix}.log" > immediateFlush="false" > > <PatternLayout pattern="%d %-5p - %m%n" /> > <Policies> > <TimeBasedTriggeringPolicy interval="1" modulate="true" /> > </Policies> > </RollingFile> > </Appenders> > <Loggers> > <Logger name="com.x" level="error" additivity="false" > > <AppenderRef ref="xLog" /> > </Logger> > <Logger name="io.y" level="error" additivity="false" > > <AppenderRef ref="yLog" /> > </Logger> > <Logger name="org.z" level="error" additivity="false" > > <AppenderRef ref="zLog" /> > </Logger> > <Root level="all"> > <AppenderRef ref="appLog" /> > </Root> > </Loggers> > </Configuration> > > As you can see, for each x, y, z, etc modules, I have defined an appender > and a logger. This made the xml too long and maintenance has become more > and more difficult. > > I have some questions: > > 1. I had found out that multiple loggers should not refer to same file > appender (e.g. FileAppender, RollingFileAppender etc). Is it still valid > for latest versions? > > 2. Is there a way to shrink the xml by reducing both appenders and loggers? > > 3. Is it a feasible feature for log4j2 so that a logger can have multiple > names? (I am thinking about requesting the feature) > For example: > <Logger level="error" additivity="false" > > <Names> > <Name name="com.x" /> > <Name name="io.y" /> > <Name name="org.z" /> > </Names> > <AppenderRef ref="xLog" /> > </Logger> > > Regards, > sazzad > -- Matt Sicker <boa...@gmail.com>
