Why Spring AOP is preferred over log4j or common-logging?

Why Spring AOP is preferred over log4j or common-logging?

What are the advantages over these two?

I have seen some discussion & found that mix approach can be used... Can anyone elaborate that where & how to handle such situation?

Spring AOP is NOT preferred over log4j or common-logging?
Spring AOP is used in conjunction with and logging framework - log4j, slf4j or commons-logging to separate logging concern from your main business code.

I suggest looking at the spring source provided aspect training - http://www.springsource.com/training/free-online-training-developing-aspects-a
It provides a great overview of AOP & the example used is of logging so you'll get a really good understanding of how to use Spring AOP for logging.

Thanks! Sam.

logging frameworks like log4j are specialized and focused on best logging options and features.

spring aop or any aspect system will be an overkill unless:

1. you need more than logging
2. it is a cross-cutting concern. that means, your custom logging action needs to be applied to many areas or classes in your application.