October 2010
Intermediate to advanced
1920 pages
73h 55m
English
Content preview from ASP.NET 4 UnleashedBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Using Polling SQL Cache Dependencies
A Polling SQL cache dependency is the most flexible type of SQL cache dependency, and I recommend that you use Polling rather than Push SQL cache dependencies for most applications. You can use a Polling SQL cache dependency to detect any type of modification to a database table.
Behind the scenes, a Polling SQL cache dependency uses a database trigger. When a table is modified, the trigger fires, and a row in a database table named AspNet_SqlCacheTablesForChangeNotification is updated to record that the table has been changed.
The ASP.NET Framework uses a background thread to poll this database table for changes on a periodic basis. If there has been a change, any item in the cache that is dependent on the ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.