Enabling Service Broker in SQL Server 2008

Question

I am integrating SqlCacheDependency to use in my LinqToSQL datacontext.

I am using an extension class for Linq querys found here - http://code.msdn.microsoft.com/linqtos

Answer 1

All connections to the DB must be be dropped and user account with permissions used to enable the broker service.

The following would be ideal (replace databasename):

     IF ((SELECT is_broker_enabled FROM sys.databases WHERE name = '%DATABASE_NAME%') = 1)
      BEGIN
        ALTER DATABASE %DATABASE_NAME% SET NEW_BROKER WITH ROLLBACK IMMEDIATE;
     END

    ALTER DATABASE %DATABASE_NAME% SET ENABLE_BROKER WITH ROLLBACK IMMEDIATE;

Also I suggest creating a new role and user account with the proper permissions (replace database login):

  --DBA creates a new role 
   if not exists (select 1 from sys.database_principals where name='sql_dependency_subscriber' and Type = 'R')
  begin
   EXEC sp_addrole 'sql_dependency_subscriber' 
  end

  --Minimum Required  Permissions needed for SQLDependancy Notification to work
   GRANT CREATE PROCEDURE to sql_dependency_subscriber;
   GRANT CREATE QUEUE to sql_dependency_subscriber; 
   GRANT CREATE SERVICE to sql_dependency_subscriber;
   GRANT REFERENCES on CONTRACT::[http://schemas.microsoft.com/SQL/Notifications/PostQueryNotification] to sql_dependency_subscriber ;
   GRANT VIEW DEFINITION TO sql_dependency_subscriber;

  --Minimum Required  Permissions  needed for SQLDependaney Notification to work
   GRANT SELECT to sql_dependency_subscriber;
   GRANT SUBSCRIBE QUERY NOTIFICATIONS TO sql_dependency_subscriber;
   GRANT RECEIVE ON QueryNotificationErrorsQueue TO sql_dependency_subscriber;
   GRANT REFERENCES on CONTRACT::[http://schemas.microsoft.com/SQL/Notifications/PostQueryNotification] to sql_dependency_subscriber ;
   EXEC sp_addrolemember 'sql_dependency_subscriber', '%DATABASE_LOGIN%';
   EXEC sp_addrolemember 'sql_dependency_subscriber', 'sqldp';