com.liferay.portal.kernel.notifications
Interfaces 
Channel
ChannelHub
ChannelHubManager
ChannelHubManagerListener
ChannelListener
NotificationEventFactory
Classes 
BaseChannelImpl
ChannelHubManagerUtil
NotificationEvent
NotificationEventComparator
NotificationEventFactoryUtil
Exceptions 
ChannelException
DuplicateChannelException
DuplicateChannelHubException
DuplicateChannelListenerException
UnknownChannelException
UnknownChannelHubException