Example log4j2.xml (development)
For local development, I like to change some things in my log4j2 configuration.
- Make lines shorter, e.g. no worker names (just pid) or dates (just times).
- Prevent all logging to files, just console.
- Use colors for errors and warnings so they stand out.
- Filter out specific types of messages, and keep only specific other ones at debug level.
- Use buffering and async for better performance.
So here it is!
<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <Configuration monitorInterval="30"> <Appenders> <Console name="Console" target="SYSTEM_OUT" bufferSize="100"> <PatternLayout pattern="%d{HH:mm:ss,SSS} %highlight{%-5p}{FATAL=red, ERROR=red, WARN=red, INFO=blue, DEBUG=black, TRACE=black} %2tid %-26c{1} - %m%n"/> <Filters> <RegexFilter regex='Filter out pattern ".*' onMatch="DENY" onMismatch="NEUTRAL"/> <ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="NEUTRAL" /> <RegexFilter regex="Debug-level accept only this pattern .*" onMatch="ACCEPT" onMismatch="DENY"/> </Filters> </Console> <Async name="AsyncConsole"> <AppenderRef ref="Console"/> </Async> </Appenders> <Loggers> <!-- Change next two lines to DEBUG or INFO to change logging level --> <Logger name="package.outside.my.control" level="WARN"/> <Logger name="my.package" level="DEBUG"/> <Root level="DEBUG"> <AppenderRef ref="AsyncConsole"/> </Root> </Loggers> </Configuration>
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