如何在OSGI（Apache Felix）中为其他人的包实现AOP？

Question

I want to add AOP for classes of different bundles in OSGI (Apache Felix)

I need to create Aspect and to add crosscutting functionality into methods of each implementation specific interface. (prefered with help aspectj)

Problems:

• All implementations of aimed interface in different bundles
• Each of bundles have self classpath.
• We do not know witch bundles have implementation of interface

please help 8)

Answer 1

OSGi has a Weavinghook that allows you to intercept class loading. This hook allows you to inspect the byte code and modify it before it becomes a class. It also allows you to add imports.

Answer 2

The OSGi weavinghooks specification that covers weaving of classes for adding aspects.

Here is an example of how to use it. The example uses asm but I am pretty sure you can adapt it for aspectj.

Another example uses aspectj but does not have much doc and also misses a command line build.