Thank you very much for your reply.
Yes, I also thought about getting all classes and iterating them, but I thought
that there were different ways.
And a last question. Why there is no API that provides all existing layers. For
example ModuleLayer:getLayers() to return all
layers and what you think about adding this API?
Best regards, Pavel
On 8/25/24 10:29, Alan Bateman wrote:
On 24/08/2024 11:51, PavelTurk wrote:
Hello all.
Let's consider there are two java applications (in two different processes).
Application A is mine and I can do whatever I want with it.
Application B is the application I can't (or I don't want to) modify.
Now in Application A I need to get information about Application B JPMS layers,
JPMS modules etc. As I understand I can do
it via java agent. But I can't find information how I can get all JPMS layers
of the Application B in this agent.
Could anyone say how to do it, if it is possible. Or maybe there are different
ways to do it.
There aren't any APIs to enumerate "all module layers". However, if B is
deployed with a Java agent that is under A's control then code in the agent can use
Instrumentation::getAllLoadedClasses and use that to reconstruct the directed graph of
modules layers (see Class::getModule and Module::getLayer). It would of course require an
out of band means to communicate a representation of that graph to A but that shouldn't
be too hard.
-Alan
