Datasnap.DSCommon.TDSClientCallbackChannelManager.TDSChannelCallback.Execute
| [–] Properties | |
|---|---|
| Type: function | |
| Visibility: public | |
| Source: Datasnap.DSCommon.pas Datasnap.DSCommon.hpp
| |
| Unit: Datasnap.DSCommon | |
| Parent: TDSChannelCallback | |
Delphi
function Execute(const Arg: TJSONValue): TJSONValue; override;
C++
virtual System::Json::TJSONValue* __fastcall Execute(System::Json::TJSONValue* const Arg)/* overload */;
inline System::TObject* __fastcall Execute(System::TObject* Arg){ return Data::Dbxjson::TDBXCallback::Execute(Arg); }
Description
Executes the callback method.
The Execute method executes the callback method. The implemented execution commands are invoke and broadcast. If a different command is supplied when creating the channel callback object, then an exception is raised.
Execute assumes that the first pair in the JSON object has a key of either broadcast or invoke. The value of the pair is assumed to be a TJSONArray, where the first item (whose index is 0) is the message to notify (invoke/broadcast), and the second item (whose index is 1) is the data type of the message, which says whether it is a regular JSON value or a TJSONObject representation of a TObject. An item representing a JSON value will have a value of 1 while an item representing a JSON object will have a value of 2.