Hook: Define Quit Conditions For Process

Requirement

A process is needed, that cannot be cancelled or suspended or that places non-standard conditions on the two operations.

By default, processes can only be suspended, but not cancelled, by the user. This means, it is possible to shut down the Shop regardless of whether processes are running, provided the Shop state is saved upon shutdown and restored upon restart. If you want processes that cannot be extended over several sessions, or processes that can be cancelled at any time by closing the Shop, or if you need to place any other condition (like checking consistency) upon process cancellation, use this Hook.

Method of Adaptation

Replace Feature

Level of Support

Parameter Pattern

HotSpot

Processes

Hooks used

Define a new process , Incorporate a new process

Participants

NewProcess

Changes

1. NewProcess = Define a new process [NewProcess].
2. NewProcess.canQuit overrides SaleProcess.canQuit .
3. Incorporate a new process [Process = NewProcess].

Comments

• The fContextDestroy parameter gives information on the reason why the process is to be cancelled. If it is true, the reason is an explicit closing of the process's context, and you can assume that the process state will not be made persistent. If it is false, you can assume that the process's state will be made persistent.