Ability to Instrument Existing Classes about activej HOT 3 CLOSED

ActiveCodegen was designed for a completely different purpose - as a tool for generating new classes. If you need to transform classes, you should probably use a library suited for that task. We currently do not see a need to add class instrumentation to ActiveCodegen. Or, alternatively, you can use ActiveCodegen to generate subclasses for specified classes - if that suits your goals, of course.

from activej.

Hello, @sirinath
We are not planning to add class instrumentation to ActiveJ.
I believe you can use Java’s Instrumentation API with or without ActiveCodegen for this purpose. If you have trouble with this approach or if you mean something else, please let us know!

from activej.

Using 2 different bytecode manipulation libraries are not convenient. So for ActiveCodegen to be useful it may need to gain some parity with other frameworks out there like:

• https://bytebuddy.net/#/
• https://www.javassist.org/
• https://github.com/Guardsquare/proguard-core
• etc.

As for the use cases I have are:

• adding removing loggers and benchmark code into functions, try catch blocks, loops, etc.
• replacing methods with new implementations
• etc.

from activej.