Bytecode Instrumentation and Class Loading.

Sam Thomas sam.thomas at broadcom.com
Fri Sep 20 21:08:38 UTC 2019


cool thanks

Thanks
./Sam


On Fri, Sep 20, 2019 at 5:05 AM Michael Rasmussen <
Michael.Rasmussen at roguewave.com> wrote:

> On 9/18/19 2:47 PM, Sam Thomas wrote:
> > Hi,
> >
> > I'm trying to understand if a class will load as soon as all the
> transformers return. The aim is to get a class reference of a class I have
> seen in my transformer.
>
> Short answer: no.
>
> Trying to define a class can cause other classes to try to be loaded
> before (for instance the super types), meaning when you're done
> transforming class A, the same thread might try to load multiple other
> classes before it finishes defining A.
> And if any of these fail, A will also fail to be defined.
>
> > Also if there is way to get the same without triggering class loading -
> if the class is not loaded return a null reference.
>
> ClassLoader has a protected method findLoadedClass that checks if a class
> is loaded by that classloader and returns the Class instance if so, or null
> otherwise.
> But as mentioned, the method is protected so normally not accessible
> outside the classloader itself.
>
> /Michael
>
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