As part of the next release cycle we plan to release our C/C++ JNI implementation so that 3rd party JNI components can be compiled to dynamically loaded .wasm libraries.

This will be based on Cheerp (our C++ -> WebAssembly compiler).

Integration with CheerpX is another possibility, but we think building the modules from source it's a more realistic solution in the medium term.

Not using the system's runtime also means that it's impossible for an applet to attatch to a local java process as a debugger.