6.3.2.1 Overview

In the following sections, the interactions for providing the main functionality of a Vending Machine, the requesting and delivering of products, is described.

In Figure 16, an overview of the needed components and the interfaces used is given. The interface names reflect the Object names of the corresponding ObjectTypes. To emphasise, that the UI is accessing the status of the Delivery Object of the machine engine, but not calling the Deliver Method, the DeliveryStatus interface was introduced. Same applies for StopDelivery, referencing to the StopDelivery Method of the Delivery Object of the machine engine.

A Vending Machine contains one main price service, which internally may use additional price services (see Annex B).