Catch load balancing events

This article describes how to create an event handler that is called when Sitefinity CMS gets a load balancing cache invalidation message.

Perform the following:

1. Open your project in Visual Studio.

2. Create a class implementing the ISystemMessageHandler in the following way:

   C#

   using Telerik.Sitefinity.LoadBalancing;
   
   namespace SitefinityWebApp
   {
       public class LBHandler : ISystemMessageHandler
       {
           public bool CanProcessSystemMessage(SystemMessageBase message)
           {
               return true;
           }
   
           public void ProcessSystemMessage(SystemMessageBase message)
           {
               //your custom implementation
           }
       }
   }

   The CanProcessSystemMessage() determines how the handler handle the message. For example, based on the message key. The ProcessSystemMessage() processes the message.

3. In Sitefinity SMC backend, navigate to Administration» Settings» Advanced.

4. In the left pane, expand System» LoadBalancing» Handlers.

5. Click Create new and enter SitefinityWebApp.Custom.LBHandler

6. Save your changes.