RSocket

http://rsocket.io/
RSocket is a binary protocol for use on byte stream transports such as TCP, WebSockets, and Aeron.

• Efficient.
• Reactive.
• Binary.
• Back-pressure support.
• Polyglot (Java, JS, C++, ...).
• Streams multiplexed over a single socket.

Java: https://github.com/rsocket/rsocket-java

Spring (experimental): https://github.com/viniciusccarvalho/spring-cloud-sockets

Spring 5 (not implemented): https://jira.spring.io/browse/SPR-16751

Dubbo https://github.com/apache/dubbo