RSocket configuration property for port not working if transport is websocket

[mmihael]

Spring boot version: 2.2.0.BUILD-SNAPSHOT

Example configuration I'm using:

spring:
  rsocket:
    server:
      transport: websocket
      port: 7000

Netty RSocket always starts on a random port when I use this configuration.
Works fine for tcp transport.

Checking NettyRSocketServerFactory.createTransport and configuration prop for the port is never passed to HTTP server configuration there if resourceFactory != null.
This is at least strange/confusing because the existence of port property is condition for this auto-config to trigger.

[bclozel]

Closing in favor of #18200