What is a sample default config file in YAML for log4j2?

Question

The documentation for log4j2 configuration provides a nice sample XML document equivalent to the default configuration:

<?xml version="1.0" encoding="UTF-8"?> <Configuration status="WARN">   <Appenders>     <Console name="Console" target="SYSTEM_OUT">       <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>     </Console>   </Appenders>   <Loggers>     <Root level="error">       <AppenderRef ref="Console"/>     </Root>   </Loggers> </Configuration> 

What would the equivalent file look like as (valid) YAML?

Answer 1

❐ The YAML file

The equivalent YAML file ( log4j2.yaml ) looks like this:

Configuration:   status: warn    Appenders:     Console:       name: Console       target: SYSTEM_OUT       PatternLayout:         Pattern: "%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"    Loggers:     Root:       level: error       AppenderRef:         ref: Console 

This file is automatically loaded (assuming that the file is in the classpath and having the required dependencies), as described in Automatic Configuration.

❐ Maven

If you are using Maven, the following dependencies are required:

<dependency>     <groupId>org.apache.logging.log4j</groupId>     <artifactId>log4j-api</artifactId>     <version>2.1</version> </dependency> <dependency>     <groupId>org.apache.logging.log4j</groupId>     <artifactId>log4j-core</artifactId>     <version>2.1</version> </dependency> <dependency>     <groupId>com.fasterxml.jackson.dataformat</groupId>     <artifactId>jackson-dataformat-yaml</artifactId>     <version>2.5.0</version> </dependency>