spring-boot-log4j2 is a repository that includes a spring boot log4j2 logging facade example

• spring boot log4j2

• Richard Lawlor - [email protected]

• Check out (clone) git repository
• Install java 8
• Import as maven project into your IDE, ensure your settings.xml file is correct
• -Dspring.profiles.active=dev
• Run SpringBootLog4j2Application

• [2019-06-12 17:17:43,864 DEBUG SpringBootLog4j2Application.main] Debug log message
• [2019-06-12 17:17:43,868 INFO SpringBootLog4j2Application.main] Info log message
• [2019-06-12 17:17:43,868 WARN SpringBootLog4j2Application.main] Warning log message
• [2019-06-12 17:17:43,869 ERROR SpringBootLog4j2Application.main] Error log message
• [2019-06-12 17:17:43,869 FATAL SpringBootLog4j2Application.main] Fatal log message

In the log4j2.xml set your rolling file on line 23 to be

• (windows) <RollingFile name = "File" fileName="C:${path}/${filename}.log" filePattern="C:${path}/${archive}"

You can find the log file at C:/rlawlor/dev/spring-boot/log4j2.log

• (unix or linux) <RollingFile name ="File" fileName="${sys:user.home}${path}/${filename}.log"filePattern="${sys:user.home}${path}/${archive}">

You can find the log file at /home/username/rlawlor/dev/spring-boot/log4j2.log

• [2019-06-12 17:31:04,305 DEBUG SpringBootLog4j2Application.main] Debug log message
• [2019-06-12 17:31:04,309 INFO SpringBootLog4j2Application.main] Info log message
• [2019-06-12 17:31:04,309 WARN SpringBootLog4j2Application.main] Warning log message
• [2019-06-12 17:31:04,309 ERROR SpringBootLog4j2Application.main] Error log message
• [2019-06-12 17:31:04,310 FATAL SpringBootLog4j2Application.main] Fatal log message

• In order to test the different log4j2 patterns
• In the log4j2.xml on line 19 and 23 change the default_with_method option to default or verbose
• Now re-run your spring boot application and these patterns can be viewed and tested

• The log hierarchy is

• ALL < TRACE < DEBUG < INFO <WARN <ERROR <FATAL <OFF

• In the log4j2.xml set your root level on line 34 to be INFO for example

• Now INFO, WARN, ERROR and FATAL are what's available