TROEventData

Overview

The TROEventData object represents the data that is associated with the current event. It is used to save and get data about events that were passed from the server to the client.

You will not usually deal with the TROEventData class directly. It is used in the auto-generated _Intf module (see more in Files Generated from RODL) for event sinks defined in the RODL library. To store the event data, the TROEventData object uses the StoreEventData procedure of the IROEventRepository interface. To get the event data, it uses the GetEventData procedure of the IROEventRepository interface.

For example: In the Remoting SDK HTTP Chat sample, the TROEventData class is used to store the data that is associated with the OnLogout event sink:

procedure THTTPChatEvents_Writer.OnLogout(const __Sender : TGUID; const aUserID: UnicodeString);
var __eventdata : Binary;
begin
  __eventdata := Binary.Create;
  try
    __Message.InitializeEventMessage(NIL, 'HTTPChatLibrary', EID_HTTPChatEvents, 'OnLogout');
    __Message.Write('aUserID', TypeInfo(UnicodeString), aUserID, []);
    __Message.Finalize;

    __Message.WriteToStream(__eventdata);

    Repository.StoreEventData(__Sender, __eventdata, ExcludeSender, ExcludeSessionList, SessionList.CommaText);
  finally
    __eventdata.Free;
  end;
end;

Location

• Unit: uROServerIntf.pas
• Ancestry: TROEventData

property Data: TROBinaryMemoryStream read

property ID: TGUID read write

constructor Create(aID: TGuid; anEventDataStream: TStream)

function AddRef: Integer

function RemoveRef: Integer