Running tasks in background sessions

When you execute long-running tasks, such as generating a large report or posting many documents in one batch, this blocks the user interface, forcing the user to wait until the task completes. Such extensive tasks can be run as background sessions, while the UI remains responsive.

How to do it...

This recipe shows how to run a batch job in a background session. The code in the recipe starts a session that posts sales and purchase invoices:

1. Create a codeunit 50019 Post Invoices.

2. In the OnRun trigger, declare the following local variables:

   Name	DataType	Subtype
   SalesHeader	Record	Sales Header
   PurchaseHeader	Record	Purchase Header
   SalesPost	Codeunit	Sales-Post
   PurchPost	Codeunit	Purch.-Post

3. Enter the OnRun trigger code as follows:

           WITH PurchaseHeader DO BEGIN 
             SETRANGE("Document Type","Document Type"::Invoice); 
           IF FINDSET THEN 
             REPEAT 
               Receive := TRUE; 
      ...