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What are basic components of Notification services?

Posted By :John     Posted Date :April 06, 2009    Points :10   Category :Sql Server 
Notification Services applications are based on a subscriber/subscription model.
The Key components in a Notification Services application are

Subscriber
A user or application that requests and receives the notification

Subscription
A request for information, delivery mechanism, and destination for requested notifications. For example change of a stock price.

Event
A piece of information, in which the subscriber is interested. For example as soon as a stock price has changed an event can be generated that's processed within SQLNS.

Notification
A message containing the information requested by the subscriber in the subscription

You can also find related Interview Question to What are basic components of Notification services?  below: 

What are 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 to a wide variety of devices. For example, a notification can be sent to a user's cellular phone, personal digital assistant (PDA), Microsoft Windows Messenger, or e-mail account. Because these devices often accompany the user, notifications are ideal for sending high-priority information.

We can create the notification Services in 2 ways:
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Explain architecture of Notification Services?

  
Notification Services applications are based on a subscriber/subscription model.
The Key components in a Notification Services application are

Subscriber: A user or application that requests and receives the notification
Subscription: A request for information, delivery mechanism, and destination for requested notifications. For example change of a stock price.
Event: A piece of information, in which the subscriber is interested. For example as soon as a stock price has changed an event can be generated that's processed within SQLNS.
Notification: A message containing the information requested by the subscriber in the subscription.

SQLNS executes the following steps whenever it generates a new notification and sends it to registered subscribers:

.Subscribers create subscriptions with a subscription management application, such as an ASP.NET or Windows Forms front end.
.Subscription management is the only part of an SQLNS application where users or applications are actively involved in the process. You generate subscriptions using a managed assembly shipped with SQLNS.
.The Notification Application collects events, which are processed within the SQLNS application.
.SQLNS uses T-SQL statements to assign events to the subscriptions registered in the first step.
.SQLNS generates new notifications whenever it finds an assignment.
.A Formatter formats the new notification, and SQLNS delivers it through a delivery channel to the registered target device of the subscriber. (More...)

Which are the two XML files needed for notification services?

  
SQLNS Configuration Files need a pair of XML-based configuration files: the Instance Configuration file and the Application Definition file.

Instance Configuration file
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Application Definition File
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What are the basic components in a Plugin Architectured application.

  
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What is the relationship between the .NET Framework and COM+ Services?

  
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NET Remoting Versus Web Services?

  
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Remoting is .a technology that allows programs and software components to interact across application domains, processes, and machine boundaries. This enables your applications to take advantage of remote resources in a networked environment.

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Yes

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What are the essential components of SQL Server Service broker?

  
Queues
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What is the difference between SharePoint Portal Server and Windows SharePoint Services?

  
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What is Microsoft Windows SharePoint Services? How is it related to Microsoft Office SharePoint Server 2007?

  
Windows SharePoint Services is the solution that enables you to create Web site for information sharing and document collaboration. Windows SharePoint Services - a key piece of the information worker infrastructure delivered in Microsoft Windows Server 2003 - provides additional functionality to the Microsoft Office system and other desktop applications, and it serves as a platform for application development.Office SharePoint Server 2007 builds on top of Windows SharePoint Services 3.0 to provide additional capabilities including collaboration, portal, search,Enterprise content management,business process and forms, and business intelligence. (More...)

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