Chapter 18. Notification Services
Notification Services is a programming framework based on XML and T-SQL. It is used to create applications that generate and send messages to subscribers. Notifications can be sent according to a schedule, or in response to conditions or events. Notifications can be sent using built-in or custom delivery protocols. They can be delivered to messaging systems such as email or cell phones.
Notification Services applications have a variety of uses, including:
- Customer applications
Notify customers about statuses, service changes, or products that might meet a customer’s criteria
- Business applications
Monitor line-of-business data, company operations, and business intelligence data
- Employee applications
Connect employees as part of workflow or keep them updated with timely information
Architecture
Notification Services applications are based on a subscriber/subscription model. Here are some key terms used to describe the entities participating in a Notification Services application:
- Subscriber
A user or application that requests and receives the notification
- Subscription
A request for information, delivery mechanism, and destination for requested notifications
- Event
A piece of information or an occurrence in which the subscriber is interested
- Notification
A message containing the information requested by the subscriber in the subscription
Figure 18-1 shows the relationship between these entities.
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