NotificationQ is used to queue events for the other services. IndexingQ will queue events for the Indexing/Search service. SubscriptionQ will queue events for the Subscription service. SummarizationQ will queue events for the Summarization service.
Other services and client will establish additional notification queues.
Notification SPI (Service Provider Interface)
An interface for generalized event notification between services and clients. JMS (Java Message System) is the foundation for the Notification system.