TsgcWSPServer_WAMP › Events › OnUnSubscription

OnUnSubscription Event

Fires when a client sends an UNSUBSCRIBE frame and the broker has removed it from the topic.

Syntax

property OnUnSubscription: TsgcWSSubscriptionEvent;
// TsgcWSSubscriptionEvent = procedure(Connection: TsgcWSConnection; const Subscription: String) of object

Default Value

—

Remarks

Raised after the internal subscriber list for Subscription has been updated to exclude Connection. The client will no longer receive EVENT messages for that topic URI. When a client disconnects without explicitly sending UNSUBSCRIBE, this event is not raised — the broker cleans the subscription up from OnDisconnect. Use this handler for audit logging or to release per-topic resources the application attached to the client.

Example

procedure TForm1.WAMPServerUnSubscription(Connection: TsgcWSConnection;
  const Subscription: String);
begin
  Memo1.Lines.Add(Format('[%s] left %s', [Connection.Guid, Subscription]));
end;

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