Functions cannot be put into shared cache anymore

[Owlbertz]

Hi,

I have a setup where I put functions into the shared cache so they can be used as a callback by other rules. This is used to dynamically execute actions using Pushover messages.
It worked fine, but with updating to OH 5.2.1 and the latest openhab-js this fails. This is most likely caused by the newly introduced javaify method. It would be great if the old behavior would still be possible.

[Nadahar]

I don't quite understand how this will ever work, it must be between rules created in the same .js file then? But yes, #560 will make it possible to do again.

[Owlbertz]

Well that's why I had to put the callbacks into the shared cache instead of having keeping them in normal JS variables.

[Nadahar]

Yes, but the point is that GraalJS will throw a "multithreaded exception" if you try to access a JS object created by one thread from another. Rules are all run by different threads, which is why I don't quite understand how it can work in the first place.

[Nadahar]

You should add "shared" to the issue title. Functions can still be put in the private cache.

[Owlbertz]

Ah sorry, I assumed that both caches work in the same way.

[Nadahar]

Ah sorry, I assumed that both caches work in the same way.

No, the private cache is unaffected by all this, there's no javaify() or jsify() being applied at all.