How to dynamically turn on or off one appender of rootLogger in log4j2?

Question

How to dynamically turn on or off one appender of rootLogger in log4j2 by java at runtime?

for example, I wanna disable Console Appender:

...
    <Loggers>
        <Root level="INFO">
            <AppenderRef ref="Console"/>
            <AppenderRef ref="RollingFile"/>
        </Root>
    </Loggers>
...

Is it possible?

Answer 1

You can programmatically add or remove an appender. In your case let's remove Console

final LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
final Configuration config = ctx.getConfiguration();
config.getRootLogger().removeAppender("CONSOLE");
ctx.updateLoggers();

There is a LifeCycle interface with methods stop and start, but it looks like you can not restart an appender after it was stopped.

Answer 2

You could add a script filter to the console appenderref that checks the value of a system property. Then just set the property when you want logging to the console disabled. Reset it when you want it turned back on.