Simple Loging example by using Log4j

Log4j is Apache project for logging in java application .Log4j is written in java .  Log4j Apache project founded by Ceki Gülcü .

 

Ceki Gülcü .Geneva Area, Switzerland

 

 

log4j is a reliable, fast and flexible logging framework .

 

Log4j  Architecture

 

Log4J is layered architecture each layered provide different object perform different task .

there are two type of object in Log4j Architecture.

 

Core Object :-      Core Objects are mandatory objects used for logging .

Support Object: - Support Object are optional object used by Core object to perform logging .

 

Core Object :-  

Core Object consist of following type of objects

Logger Object :- Logger object used to capturing logging information .

Layout Object : - Layout object allow the publish logging information in different style .

Appender Object :- Appender  object  is responsible publish logging information to various preferred destination  such as database, file ,network , console .

 

Support Object :-

Level Object :- Level object define priority of any logging  information  there are seven logging level in log4j API.

1. OFF

2.DEBUG

3. INFO

4 ERROR

5 WARN

6 FATAL

7 ALL

Filter Object : -   Filter object is used to analyze logging information and further decide whether logging information is printed