The test is presenting two processors:

Delegating processor that simply delegates the posted in messages to frondend over websocket UPDATE notification.

Cumulating processor that processes messages by summing up all incoming currency amounts and is meant to track the revenue of the trading company. After a processing is done the frontend(s) are notified over websocket by UPDATE notification.

The concept of snaps is used to minimize the trafic between backend and frontend.

Used frameworks:

Backend - Jersey, Spring, Websocket (JSR365), Simple log facade Frontend - jQuery