Hook: Change A SalesPoint's Quit Conditions

Requirement

The default conditions imposed on SalesPoint closing are not sufficient.

Method of Adaptation

Augment feature

Level of Support

Parameter Pattern

HotSpot

Shutdown

Hooks used

Add a new point of sale

Participants

SalesPoint, NewSalesPoint

Changes

1. subclass NewSalesPoint of SalesPoint.
2. NewSalesPoint.canQuit overrides SalesPoint.canQuit :
1. NewSalesPoint.canQuit returns true if the SalesPoint can be closed.
3. Add a new point of sale [NewSalesPoint = NewSalesPoint].

Comments

• The fNoPersistence parameter tells whether the state of the SalesPoint will be saved before quitting the SalesPoint.
• If you want to change the SalesPoint's reaction if canQuit is called with fNoPersistence set to true and no process running on the SalesPoint, rather override onCanQuit .