This is Marcus Schiesser's code from his presentation on JavaEE 7.
Marcus demo'd Websockets in upcoming EE7. There are also other demos in the parent repository of other Java 7 features.
Slides are here http://files.meetup.com/3326032/Slides%20Java%20EE%207%20JUG%20Melbourne.pptx
Note that the demo's are in German, which Marcus' book is written in, but Marcus is happy to translate and get volunteers to help do a conversion to English. If interested get in touch via mail [at] marcusschiesser.de