You can indeed spawn a Java application behaving as an Erlang Node as seen from your Elixir application, using the Java library OtpErlang.jar, built along the erlang application :jinterface.

Note that the version available on Maven is very outdated, you will have to pull it from Erlang. I have a github action here building OtpErlang.jar for the last 3 versions of OTP if you’d like. I wouldn’t advise pulling it from my repo yet but you can use it a a basis.

But in your case, I’d probably go with the Node library, or the Go library through wasmer/wasmex, since mastercard provides the same library for go, python, java, php, node, c#, and ruby. Or rewrite it in Elixir.

This would avoid running a companion java application along your main application. Also note that Jinterface/OtpErlang is now considered legacy but stable by the OTP team. This means that there are applications that actively use it and that they should not be disturbed by a breaking change, but that maybe it isn’t the best choice to depend on it for a new project today when there are alternatives.

Carefully weigh your options .

Whoops, did not see the thread was 8 months old..

This talk from @sasajuric about using the Kafka java libraries might help: https://www.youtube.com/watch?v=iVHpFoDXim4