Primary notification classes

The notification classes are divided into four groups:

Notifier classes provide an interface and implementation to senders for accepting connections and issuing notifications.

Connection classes manage a receiver's set of interests and deliver corresponding notifications to the receiver.

Interest classes identify the sender and the name of an event about which the sender notifies. You can create derived classes to carry additional information to further identify the event.

Notification classes deliver news of an event involving a sender to receivers. You can create derived classes to carry additional information.