README.adoc

Apache Log4j Samples: custom lookups

This project shows how to write a custom lookup.

In order to use it:

1. install the artifact and its parent locally with mvn install,

2. add it to your Maven project:

   <dependency>
     <groupId>org.apache.logging.log4j.samples</groupId>
     <artifactId>log4j-samples-loggerProperties</artifactId>
     <version>2.19.1-SNAPSHOT</version>
   </dependency>

3. use $${custom:some_key} in the pattern of your pattern layout,

4. in your code assign some properties to a logger using CustomLookup#setLoggerProperties.