WS-Eventing

In a business process, a participating web service may be interested in receiving notifications whenever a certain type of event occurs in relation with other participating web services. A web service that is interested in such a notification should register its interest (subscribe) with other web services (event sources) where such events may be generated. The subscriber is called an event sink. The WS-Eventing specification allows you to create and delete event subscriptions. An expiration time may be set for each subscription. A subscriber may renew or unsubscribe its subscription with the event source.

All these requests are performed by sending an appropriate message to the event source. The WS-Eventing specification defines the message format for achieving this. Like the other specifications we discussed, this specification also relies on other service specifications for secure, reliable, and transacted message delivery.

Event Subscription

An event sink subscribes to an...