Event is not triggered

BIZ TMS Echo
1

I added the following code to the XData demo (server).

But the event never fires.

EchoModule.Events.OnEntityInserted.Subscribe(
  procedure ( Args : TEntityInsertedArgs )
  begin
    // my code
  end
);

Where is my mistake?

2

TMS Echo server doesn't publish any automatic CRUD endpoint, everything is communicated via service operations. Thus it's expected that such event never fires.

3

Is there any other way to know which entities are being inserted/edited/deleted via echo replication?

4

You can use the regular Aurelius events for the model of your application: Events | TMS Aurelius documentation

5

The event is also not triggered...

procedure StartServer;
var
//  Module : TXDataServerModule;
  EchoModule: TEchoServerModule;
  Pool: IDBConnectionPool;
  NodeManager: IEchoNodeManager;
  Conn: IDBConnection;
begin
  if Assigned(SparkleServer) then
     Exit;

  TMappingExplorer.Default.Events.OnInserted.Subscribe(
    procedure(Args: TInsertedArgs)
    begin
      with TStringList.Create do
      begin
        if FileExists( 'logs.txt' ) = True then
          LoadFromFile('logs.txt');

        Add( FormatDateTime('dd/mm/yyyy hh:nn:ss.zzz', Now) + ' - ' + Args.Entity.ClassName );
        SaveToFile('logs.txt');
        Free;
      end;
    end
  );

  // rest of the code
6

Hi !
I still don't use TMS Echo. To make the replication, does it relay on purely model objects manipulation, or on Aurelius insert/update/delete SQL sentences generated on source nodes? If the latter, i think it wouldn`t fire Aurelius events when replicating on target nodes. Does it work this way?

BTW, I noticed something with your log routine: It's reading the whole file and rewriting it.
If TMS Logging is not an option right now, I would recommend something like:

procedure SaveLOG(const AMessage, AFileName : string);
var
  F: TextFile;

begin
   tthread.Queue(nil, procedure begin
   AssignFile(F, AFileName);
   try
      append(f);
   except
      rewrite(f);
   end;
   writeln(f, FormatDateTime('dd/MM/YYYY HH:mm:ss', now) + ' - ' + AMessage);
   closefile(f);
   end
   );
end;

and then call SaveLOG(Args.Entity.ClassName, 'logs.txt');

7

Sorry, I think here is the answer to my question:

In that topíc, by "client" you mean target node? And "All echo operations are done through Aurelius" includes saving data on target node?

@Giovani_Lagemann_Erthal ,
TMappingExplorer.Default.Events.OnInserted.Subscribe - I know it works. I use it in "normal" Aurelius applications. Cannot help on TMS Echo firing events or not. Sorry.

8

The code is irrelevant. It's just to test if the event is being fired (which is not the case).

I use Aurelius Events in my applications. However, they are not being called during the replication process (echo).

Anyway, thanks for the help!

9

Sorry. Indeed, after reviewing TMS Echo code, I see that events are not triggered. For performance and other reasons, Echo uses low level methods for database operations, thus the code that fires events is never reached.