JSR-356 comprises both: client and server endpoints.
This screencast demonstrates how to connect to a (Java EE 7) server from a plain Java client using the RI (tyrus):
Also checkout: hellsockets.
See also other screencasts at: http://tv.adam-bien.com or subscribe tohttp://www.youtube.com/user/bienadam.
See you at Java EE Workshops at Munich Airport, Terminal 2 or Virtual Dedicated Workshops / consulting
NEW online workshop: Web Components training (online)
Airport MUC workshops: Java EE 8, Java 9: Bootstrap, Effective, Architectures, Single Page Apps, Progressive Web Apps, HTML 5, ES 6, CSS 3 and Microservices
Podcast: airhacks.fm and newsletter: airhacks.news
A book about rethinking Java EE Patterns