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javalog4j2string-matching

Log4j2 conversion pattern for logger names

I'm trying to trim logger names in Log4j2 Core's PatternLayout.

Examples logger name:

com.test1.test2.test3.test4.test5.ClassName

Expected output:

c.t.t.t.t.test5.ClassName

In the docs I can only trim from the end not from beginning.

Any suggestions would be helpful.

Solution

  • There is no pattern that allows you to abbreviate all components except the last two. This has been reported in LOG4J2-2785 and there is work in progress on this issue.

    Edit: Since version 2.19.1 you can use the following pattern to abbreviate all components, except the last two:

    1.2*

    See also this question.