Event system not working on Tridion 2011 sp1

Question

I am trying to implement a very basic event system example in tridion 2011 sp1. I have followed below steps.

1. Created a class library project. Here is my code

   [TcmExtension("TridionEventSystemTest")]
   public class TestEvent : TcmExtension
   {
       public TestEvent()
       {
       Subscribe();
       }        
   
       public void Subscribe()
       {    
           EventSystem.Subscribe<Component, DeleteEventArgs>    (OnComponentDeletePre,EventPhases.TransactionCommitted);
       }
   
       private static void OnComponentDeletePre(Component com, DeleteEventArgs args, EventPhases phases)
       {
           string source = "custom event system";
           string message = "custom event handler has been executed successfully";
           if (!EventLog.SourceExists(source))
               EventLog.CreateEventSource(source, "Application");
           EventLog.WriteEntry(source, message);
           EventLog.WriteEntry(source, message, EventLogEntryType.Warning, 234);
       }
   }
   

2. I did shut down iis, com+ services, tridion content manager service host

3. Copied the class library project dll
4. Added extension in tridion content manager config
5. Restarted all the above services

When I delete a component in CMS I can see the below message in event viewer

TCM Extension initialized: TridionEventSystemTest (TridionEventSystem.TestEvent)

Component: Tridion.ContentManager Errorcode: 0 User: NT AUTHORITY\NETWORK SERVICE

I can not see any other message related to event system in event viewer. So I think my event handler is not getting called even when TCM Extension is initialized.

Please help,

Answer 1

You see event viewer message that your extension was initialized, so no problem here. However, it might be the case that you (NETWORK SERVICE) don't have rights to write to event log, or your code is just wrong. I would suggest trying something simpler, like creating a file on the hard drive, or just throwing exception. This way you will at least know that your code was executed.

Answer 2

Did you verified that there is no dependency on any DLL other than your Event System DLL. If it is, you may need to place it in Tridion bin directory or may be need to register in GAC.

For Example: The EventLog class is a part of same assembly or some other assembly? Just in case this class or any of its member is in some other assembly or any of its member is using some other DLL to write log to Event Logs, then you may need to take care of that dll as well by registering in the GAC on CMS server.