Incompatible change to java.lang.instrument.Instrumentation

[Alan Bateman]

On 16/06/2017 08:40, Jaroslav Tulach wrote:
> :
>>> So can you say what NetBeans is doing? Is this mocking, maybe
>>> forwarding/intercepting?
> See https://netbeans.org/bugzilla/show_bug.cgi?id=237919
>
If I read this correctly then NBInstrumentation is only interested in 
the addTransformer methods. If non-test code expecting an 
Instrumentation object gets a reference to the NBInstrumentation 
implementation then it will deeply disappointed when it finds that 
methods such as getObjectSize, appendToBootstrapClassLoaderSearch, etc. 
don't implement the spec. If it wrapped or forwarded to a "real" 
Instrumentation object then it might be more compelling.

However point taken and we'll have to see whether it makes sense to make 
these default implementations (which has spec implications so I can't 
guarantee that this can be done at this late stage in JDK 9).

-Alan