The first part of this is to create the data contract, which is done by following these steps:

1. Create a new class named ConWHSVehicleGroupChangeContract.
2. Complete the declaration as follows:

[DataContract] 
class ConWHSVehicleGroupChangeContract 
        extends SysOperationDataContractBase 
{ 
    ConWHSVehicleId      vehicleId; 
    ConWHSVehicleGroupId vehicleGroupId; 
} 

3. Then add the data member property methods, as shown here:

[DataMember] 
public ConWHSVehicleId vehicleID(ConWHSVehicleId  
                                 _vehicleId = vehicleID) 
{ 
    vehicleID = _vehicleID; 
    return vehicleID; 
} 
[DataMember] 
public ConWHSVehicleGroupId vehicleGroupId( 
                    ConWHSVehicleGroupId 
                        _vehicleGroupId = vehicleGroupId) 
{ 
    vehicleGroupId = _vehicleGroupId; 
    return vehicleGroupId; 
} 

Now, to create the class that performs the update, let's follow these steps:

1. Create a new class named ConWHSVehicleGroupChange.
2. Within the class, declare the data contract as a global variable to the class, as follows:

public ConWHSVehicleGroupChangeContract contract; 

3. This class will have the following methods as a minimum:
   • public Run(<data contract>)
   • public boolean Validate()
   • public <class> Construct()
4. Create these methods as follows:

public boolean Validate() { 
    If (contract.VehicleId() == "") 
    { 
        //Vehicle Id must be specified 
        return checkFailed("@ConWHS:ConWHS45"); 
    } 
    If (!ConWHSVehicleTable::Exist(contract.VehicleId())) 
    { 
        //Vehicle %1 does not exist 
        return checkFailed(strFmt("@ConWHS:ConWHS46", 
                        contract.VehicleId())); 
    } 
    If (contract.VehicleGroupId() == "") 
    { 
        //Vehicle group is required 
        return checkFailed("@ConWHS:ConWHS47"); 
    } 
    If (!ConWHSVehicleGroup::Exist( 
                contract.VehicleGroupId())) 
    { 
        //Vehicle group %1 does not exist 
        return checkFailed(strFmt("@ConWHS:ConWHS48", 
                        contract.VehicleGroupId())); 
    } 
    return true; 
} 
public void Run(ConWHSVehicleGroupChangeContract) 
{ 
    if(!this.Validate()) 
    { 
        return; 
    } 
    ttsBegin; 
    this.UpdateVehicleGroup(); 
    ttsCommit; 
} 
private void UpdateVehicleGroup() 
{ 
    ConWHSVehicleTable vehicle =  
                ConWHSVehicleTable::Find( 
                        contract.VehicleID(), true); 

    if(vehicle.RecId != 0) 
    { 
        vehicle.VehicleGroupId = contract.VehicleGroupId(); 
        vehicle.update(); 
    } 
} 

The next part of the process is to create the controller class, which is done as follows:

1. Create a new class called ConWHSVehicleGroupChangeController.
2. Modify classDeclaration so that it extends SysOperationServiceController.
3. Next, override the Caption method and change this to return Vehicle group change as a label. This sets the caption, if it is added to a batch queue.
4. Do the same for the parmDialogCaption method; this sets the title of the dialog that the framework creates from the data contract.
5. Finally, we will need an entry point, which is a main method. The method should be created as per the following lines of code:

public static void main(Args _args) 
{ 
    ConWHSVehicleGroupChangeController  controller; 

    controller = new ConWHSVehicleGroupChangeController( 
                   classStr(ConWHSVehicleGroupChange), 
                   methodStr(ConWHSVehicleGroupChange, 
                             Run), 
                   SysOperationExecutionMode::Synchronous); 
    controller.startOperation(); 
} 

6. Save the changes and create Action Menu Item in our project.
7. Name the menu item as ConWHSVehicleGroupChangeController and set the Object Type property to Class and the Object property to ConWHSVehicleGroupChangeController.
8. Add this to the PeriodicTask submenu of the ConWHSVehicleManagement menu and build the project.