RE: trouble with instrumenting interdependent classes

Can't tell for sure if this is what is happening to you but I'm fairly
certain class transformers are not-reentrant unfortunately. So if in the
middle of your transform() method you end up loading a class that would
end up calling back into the same transformer it will just get skipped --
it is a very annoying "feature". I'd google around on this for more
information and possible workarounds.

I think one hack is to use another thread since the flag for this is
thread local I believe. 

If you are indeed hitting this problem and find a solution/workaround
please report back

Good luck

-----Original Message-----
From: [email protected] [mailto:[email protected]] 
Sent: Friday, April 01, 2011 2:43 AM
To: [email protected]
Subject: [asm] trouble with instrumenting interdependent classes

Hi,

I'm facing an issue while instrumenting two classes that are
interdependent. 

The classes in dispute are com/mysql/jdbc/ConnectionImpl &
com/mysql/jdbc/PreparedStatement. I'm instrumenting the method
ConnectionImpl.prepareStatement() which returns an instance of
PreparedStatement. There is also a rule defined to instrument certain
methods
in PreparedStatement. 

My ClassFileTransformer implementation is not called at all while loading
PreparedStatement whenever I instrument ConnectionImpl. However, if I
disable
instrumenting ConnectionImpl everything seems to work fine!

Any special case I have to handle here? or am I missing something here?

thanks,
ramanr

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