SYSOperation frame work and example and usage in AX 2012 and D365 opertions

Sys Operation frame work is uses the MVC(Model view control) and enable the option in to expose the method using SysentryPointAtrribute[True], SysOperationFrame work is using in , SSRS contract to get input from user, Custom services, and batch job



SysEntryPoint[] is absolute in D365 and explain how the sysOperation works in the following:

How this work:

Base classes:
SysOperationServiceController // This base class extends to the Controller class
SysOperationDataContractBase // This base class extends to the Contract class.
SysOperationAutomaticUIBuilder // This base class extends to the UI Builder class


public static void main(Args _args)
{
ConWHSVehicleGroupChangeController controller;
controller = new ConWHSVehicleGroupChangeController(
classStr(ConWHSVehicleGroupChange),
methodStr(ConWHSVehicleGroupChange,
Run),
SysOperationExecutionMode::Synchronous);
controller.startOperation();
}

==

public static void main(Args _args)
{
ConWHSVehicleGroupChangeController controller;
ConWHSVehicleTable vehicle;
switch (_args.dataset())
{
case tableNum(ConWHSVehicleTable):
vehicle = _args.record();
break;
}
if(vehicle.RecId == 0)
{
//Active buffer required.
throw error ("@SYS25821");
}
controller = new ConWHSVehicleGroupChangeController(
classStr(ConWHSVehicleGroupChange),
methodStr(ConWHSVehicleGroupChange,
Run),
SysOperationExecutionMode::Synchronous);
ConWHSVehicleGroupChangeContract contract;
contract = controller.getDataContractObject('_contract');
if(!contract)
{
//Function %1 was called with an invalid value
throw error (
strFmt("@SYS23264",
classStr(ConWHSVehicleGroupChangeController)));
}
contract.VehicleGroupId(vehicle.VehicleGroupId);
contract.VehicleId(vehicle.VehicleId);
controller.startOperation();
if(FormDataUtil::isFormDataSource(vehicle))
{
//This will call the table's data source's research
// method to refresh the data from the table.
// The true parameter will keep the current record
FormDataUtil::getFormDataSource(vehicle).research(true);
}
}