How to exclude logging for certain classes in log4j?
In log4j, the log4j.logger property can be used to configure the logging for specific classes. To exclude the logging for certain classes, a specific log level can be set for these classes to prevent them from outputting logs.
Here are several ways to exclude certain classes from logging in the configuration file:
- Using a specific logging level:
log4j.logger.com.example.ExcludedClass=OFF
The above configuration will disable the logging output of a class called com.example.ExcludedClass.
- Specify a specific Appender:
log4j.logger.com.example.ExcludedClass=NOLOG
The above configuration will specify an Appender named NOLOG, and will log the output of com.example.ExcludedClass to this Appender. In the Appender configuration, the log level can be set to OFF to completely disable logging for this class.
- Exclude logs from certain classes using filters.
log4j.logger.com.example=DEBUG, EXCLUDE
log4j.appender.EXCLUDE=org.apache.log4j.varia.DenyAllFilter
The above configuration will create an Appender named EXCLUDE and use the org.apache.log4j.varia.DenyAllFilter filter to reject all log events. Then, it will redirect the logs of all classes under the com.example package to this Appender, effectively excluding their log outputs.
The above are common methods for excluding certain classes of logs, and you can choose the appropriate configuration based on your specific needs.
