Thanks @jayjun - yes, the java process will be long lived. I’ve worked up a more extended example that uses Erlang ETF to transmit the payload back and forth. The Ericsson JInterface library has all the parsing and packaging routines. There are a couple of gotchas that I’ll write up (eg the OtpOutputStream doesn’t write the first byte - 131 - for some reason so you have to do that by hand), but it seems pretty straightforward otherwise. The Java side can respond synchronously to each call in my case which simplifies things on that side.
