14.4 Summary

• RSocket is an asynchronous binary protocol that offers four communication models: request-response, request-stream, fire-and-forget, and channel.
• Spring supports RSocket on the server through controllers and handler methods annotated with @MessageHandler.
• The RSocketRequester enables client-side communication with RSocket.
• In both cases, Spring’s RSocket support works through Reactor’s Flux and Mono reactive types for fully reactive communication.
• RSocket communication takes place over TCP by default but can also be transported over WebSocket to deal with firewall constraints and browser clients.