log4j2.yml example

By mkyong | Updated: March 26, 2019

Viewed: 6,438 (+115 pv/w)

Tags: log4j2 logging yml

A simple log4j2.yml example, just for self-reference

P.S Tested with Log4j 2.11.2

1. Jackson for YML

Log4j 2 need the following libraries to parse yml file

	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-api</artifactId>
		<version>2.11.2</version>
	</dependency>

	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-core</artifactId>
		<version>2.11.2</version>
	</dependency>
		
	<dependency>
		<groupId>com.fasterxml.jackson.dataformat</groupId>
		<artifactId>jackson-dataformat-yaml</artifactId>
		<version>2.9.8</version>
	</dependency>

	<dependency>
		<groupId>com.fasterxml.jackson.core</groupId>
		<artifactId>jackson-databind</artifactId>
		<version>2.9.8</version>
	</dependency>

2. log4j2.yml

Configuration:
  status: warn

  appenders:
    Console:
      name: LogToConsole
      PatternLayout:
        Pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"
        
    #File:
    #  name: File
    #  fileName: logs/app.log
    #  PatternLayout:
    #    Pattern: "%d %p %C{1.} [%t] %m%n"

    RollingFile:
      - name: LogToRollingFile
        fileName: logs/app.log
        filePattern: "logs/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz"
        PatternLayout:
          pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"
        Policies:
          SizeBasedTriggeringPolicy:
            size: 10MB
        DefaultRollOverStrategy:
          max: 10

  Loggers:
    logger:
      - name: com.mkyong
        level: debug
        additivity: false
        AppenderRef:
          - ref: LogToConsole
          - ref: LogToRollingFile

    Root:
      level: error
      AppenderRef:
        ref: LogToConsole

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References

• Apache Log4j 2
• Log4j Runtime Dependencies
• Apache Log4j 2 Tutorials