WebSocket allows server side push events using OmniFaces o:socket. Faces
f:websocket is not currently working
due to an open MyFaces defect: MYFACES-4685
You must enable the web socket endpoint by below boolean context parameter in web.xml:
<context-param>
<param-name>org.omnifaces.SOCKET_ENDPOINT_ENABLED</param-name>
<param-value>true</param-value>
</context-param>