trigger a notification

Posted on 2006-07-18
Last Modified: 2010-04-23
Hi, i have a server in which will monitors a process, once the process is done it will write to the database whether the process is done or not.  Currently we are doing this at the client side, get the client to poll the database table to check the status in an infinite loop and update the client's UI to indicate that processing at server side is done. Are there better ways of polling data to check on a status besides reading the database every loop which my manager dont really like. Maybe some form of auto trigger from the sql server or things like this?
Question by:jaxrpc

Accepted Solution

Shakti109 earned 500 total points
ID: 17129717

When you say "update the clients UI...", what are you doing?

You CAN put a trigger on this table (on insert) that would take some action after a record was inserted. You could have it look at the items just inserted and if they meet the criteria then do something.

An example of an "on insert" trigger (for sql) is as follows :


ALTER TRIGGER [NotifyClientTrigger]
   ON  [dbo].[ProcessWatchTable]
      -- SET NOCOUNT ON added to prevent extra result sets from
      -- interfering with SELECT statements.
  DECLARE @Process_Name varchar(20);
  DECLARE @Process_Running int ;

  from inserted

         @Process_Running = 1
        -- Take some action

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