In an implementation or environment supporting WS-Eveneting there are three actors:
- Subscriber,
- Event Source and
- Event Sink.
The Event Sink subscribes an interest with the Event Source by operation contract, such as Subscribe. Event Source is responsible for controlling the information that Event
Sinks are interested in. The event sink can be the receiving end and the initiator of a subscription, however it is also possible that the subscription comes from a seperate component.