记录器名称的 Log4j2 转换模式

Question

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.

Answer 1

Examples:

    <Console name="ConsoleAppender" target="SYSTEM_OUT">
        <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} [%p] %c{1.} %msg%xEx%n"/>
    </Console>

%c{1.} means output the first character of package name.

Answer 2

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.