•   in-memory data store
•   state machine
•   streaming engine
•   message broker

Data source - the tool which sends the data to jCore via regular HTTP protocol - wither websockets or regular POSTs. It may setup special flag lite time-to-live for any data set.

jCore accepts the data from Data source and keeps it. Client will receive an update when the data changes. Websocket protocol is used for fast two-way communication between jCore and clients.

Client usually is reqular browser with javascript inside. It requests both the initial data and updates from jCore and shows it.

The data in the following examples is updated in real time.
We did not try to create a buitiful design here. It is just an example.
Open the developer tools and see how your browser communicates to jCore:
Sportsbook