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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?
594
This concept is known as Logger Hierarchy. Logger Hierarchy is made up of set of LoggerConfig objects with a parent-child relationship. The topmost element in every Logger Hierarchy is the Root Logger. If Log4j2 doesn't find the configuration file, only Root Logger will be used for logging with logging level as ERROR.
Log4j2 RollingFileAppender is an OutputStreamAppender that writes log messages to files, following a configured triggering policy about when a rollover (backup) should occur. It also has a configured rollover strategy about how to rollover the file.
Configuration: the root element of a log4j2 configuration file; the status attribute represents the level at which internal log4j events should be logged. Appenders: this element contains a list of appenders; in our example, an appender corresponding to the System console is defined.
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.
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