Datasnap.DSCommon.TDSClientCallbackChannelManager.TDSChannelCallback.Execute

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Object Pascal

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); }

Properties

Type Visibility Source Unit Parent
function public
Datasnap.DSCommon.pas
Datasnap.DSCommon.hpp
Datasnap.DSCommon TDSChannelCallback

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.

See Also