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  Log4j.properties file
 
Subject: Log4j.properties file
Author: EricJ
In response to: Simple Example SLF4j + Log4j
Posted on: 09/07/2013 06:34:47 AM

#
#  Define parameters
#
mycompany.log.dir=C:/tmp
mycompany.log.file=slf4j.log


# Root logger option
log4j.rootLogger=INFO, CONSOLE, FILE

#
# console
#
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=INFO
log4j.appender.CONSOLE.Target=System.err
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} - %-5p [%t:%C{1}.%M@%L] - %m%n

#
# file
#
log4j.appender.FILE=org.apache.log4j.RollingFileAppender
log4j.appender.FILE.Threshold=DEBUG
log4j.appender.FILE.File=${mycompany.log.dir}/${mycompany.log.file}
log4j.appender.FILE.MaxFileSize=1MB
log4j.appender.FILE.MaxBackupIndex=1
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=%d{ISO8601} - %-5p [%t:%C{1}@%L] - %m%n

 
# fine tune each package
log4j.logger.com.mycompany.example=TRACE


 
> 
> On 09/07/2013 06:14:07 AM EricJ wrote:
SLF4J stands for Simple Logging Facade for Java which is an abstract layer of different logging frameworks. This make the code more reusable given that the real logging implementation can be plugged-in at end user's desire.

In this example, Log4j is chosen as the real logging framework.

What are required?

1) Abstraction -- slf4j-api-x.jar

2) Adapter -- slf4j-log4j-x.jar

3) The real framework -- log4j-x.jar



Code Example:
package com.mycompany.example;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SLF4j {
	
    /** debug logger reference. */
    private static Logger logger = LoggerFactory.getLogger(SLF4j.class);
	
    public void hello(String name){
        logger.error("Hello {}!", name);
        logger.warn ("Hello {}!", name);
        logger.info ("Hello {}!", name);
        logger.debug("Hello {}!", name);
        logger.trace("Hello {}!", name);
    }

    public static void main(String[] args){
        SLF4j slf4j = new SLF4j();
        slf4j.hello("World");		
		
    }

}




References:

 


 
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