Gpfdist is really just a binary format over HTTP, so it does handle streaming use cases well.

Spring XD implemented a Java reactive version of the GPFdist protocol, so you could use that to wire it up to your existing app pretty easily (or just copy the Sink code which is pretty straightforward).

Here are some docs and synthetic benchmarks: http://docs.spring.io/spring-xd/docs/current/reference/html/...