Annotations used to add Logging to an application.

Question

Hi i want to know ...if we can use Annotation to add code for Logging to a Java application...?
I have been trying various ways using annotations, for sometime ..with no help!!! :(

Answer 1

You can use an annotation processor to add code to your existing application, but you CANNOT add code to an existing compilation unit (Source file).
Generally you generate a new class from the annotations. The new class can be either a helper class (often with static methods) whose methods are called from some class in source code, a previously non existent superclass of some class in source code, or a subclass of some class in source code.
Your job is to see if there is some way to do what you want within those constraints, that actually adds value. (Sometimes it is possible but is so complex there is no value add by doing it).
I don't know what you want, so I can't answer definitively, but I suspect that may be a fruitless exercise in your case, but I could be wrong.
I generally start by trying to separate the generated code into a separate class, do that by hand until you get something working. If you can't - give up. Once you have all the code you want to generate in separate classes from the source code, then you can start looking at what annotations you need in order to tell an annotation processor how to generate that source code.
If you ask more specific questions we might be able to be more help.
Bruce