Is there an aspect already written and tested well

问题:

I am refactoring a legacy application where the actual application is scattered in between lot of logging statements. I could immediately benefit by removing TRACE level logging (method entered/exited). However this has proven to be useful many times while debugging an app while integration testing etc. So I am wondering if there is already a working and proven (being used for a while) aspect written for this? I've gone though some online posts but they seem to simple enough (and not sure if they have ever been really used) to be used for real project.

回答1:

Checkout aspects from "AspectJ in Action" (sources can be downloaded from http://manning.com/laddad2). I have used very close variations of aspects from chapter 10 on real projects.

回答2:

You can use @Loggable annotation from jcabi-aspects, together with a built-in AspectJ aspect:

@Loggable(Loggable.TRACE)
public String load(URL url) {
  return url.openConnection().getContent();
}

It logs through SLF4J, which you can redirect to your own logging facility like, say, log4j.