Re: trouble with instrumenting interdependent classes

On 04/01/2011 11:43 AM, [email protected] wrote:
> 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

Usually it's because your transformer throws an exception during
the instrumentation of Connectionimpl.
So the VM disable the transformer and doesn't call it anymore.

Inserting a try/catch block around your transform method
will solve the problem.

Rémi

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