1746-NO8I
1746-NO8I
1746-NO8I
大致来看,两端都存在所有6层内容,冰箱和电厂需要通过某种方式实施这6层。然而具体实现的复杂度取决于可用条件和用例要实现的功能。为确定每种物件每层的设计和实施范围,需要对每种物件(或每种物件对应的领域,如果采用领域驱动的设计方法的话)都有所了解。这里需要注意,上图所示场景在具体描述上可能有所差异,对冰箱的上下文情境进行管理只是一个范例,实际情况可能更加复杂,因此用黑色表示。这个用例中需要使用“智能”的冰箱,而本例中我们设想的冰箱是相当“笨”的。参考架构与场景的映射是一回事,每一层的设计是另一回事。下文将介绍该场景中不同层面的具体设计。 在这个场景中,我们假设用户可以使用自己的智能手机与冰箱通信。为了与智能手机应用通信,冰箱必须具备应用程序集成层。另外可能还需要在供电局一端实施某种程度的应用程序集成。不过依然有必要考虑该用例是否需要涉及这个问题(毕竟本例只需要考虑电厂控制系统向冰箱发送控制信息)。 两端都需要实现物件集成,具体方式并不复杂。在这样一个原型中,物件发现模块可能相当简单,我们可以假设冰箱随时都能与电厂通信。最终通信连接的建立则可以使用成熟的规范。 在上下文管理方面,首先需要在冰箱的上下文情境和要向冰箱发送的操作指令之间达成一致。电厂端的上下文管理略显复杂,但冰箱端相对简单一些。电厂端在这里可以视作一个黑盒子,大部分情况下我们只需要将其与检测和预测峰值的现有系统集成即可。一旦检测到峰值便触发冰箱执行制冷操作,并通过物件集成将指令下发至已注册的冰箱。冰箱接到操作指令后开始判断是否需要制冷(在首个原型中可通过简单的时间约束实现)并将判断结果发回给电厂。
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