Is there dynamic module discovery in JDK9?

Question

In the upcoming Java 9, is there a way to dynamically discover which modules are available?

E.g.:

1. Run some app with some module path
2. While the app is running, add a few more modules into the module path (e.g. copy into module directories)
3. From within the app, query "give me all available modules" (perhaps with a filter, such as those providing an alternate implementation of the same service)

I can't quite tell from the documentation.

Answer 1

I don’t think such dynamic functionality is supported. Currently, the documentation of ModuleFinder.findAll() states:

A ModuleFinder provides a consistent view of the modules that it locates. If findAll is invoked several times then it will return the same (equals) result each time.