Component Diagram【转】

Component Diagrams
Component diagrams illustrate the pieces of software, embedded controllers, etc., that will make up a system. A component diagram has a higher level of abstraction than a Class Diagram - usually a component is implemented by one or more classes (or objects) at runtime. They are building blocks so a component can eventually encompass a large portion of a system.

The diagram above demonstrates some components and their inter-relationships. Assembly connectors "link" the provided interfaces supplied by "Product" and "Customer" to the required interfaces specified by "Order". A dependency relationship maps a customer's associated account details to the required interface; "Payment", indicated by "Order".

Components are similar in practice to package diagrams, as they define boundaries and are used to group elements into logical structures. The difference between package diagrams and component diagrams is that Component Diagrams offer a more semantically rich grouping mechanism. With component diagrams all of the model elements are private, whereas package diagrams only display public items.

Representing Components
Components are represented as a rectangular classifier with the keyword «component»; optionally the component may be displayed as a rectangle with a component icon in the right-hand upper corner.

Assembly Connector
The assembly connector bridges a component’s required interface (Component1) with the provided interface of another component (Component2); this allows one component to provide the services that another component requires.

Components with Ports
Using Ports with component diagrams allows for a service or behavior to be specified to its environment as well as a service or behavior that a component requires. Ports may specify inputs and outputs as they can operate bi-directionally. The following diagram details a component with a port for online services along with two provided interfaces order entry and tracking as well as a required interface payment.

posted on 2009-11-13 11:12 挑灯看剑 阅读(486) 评论(1)  编辑 收藏 引用 所属分类: 架构设计/设计模式

只有注册用户登录后才能发表评论。
<2009年11月>
25262728293031
1234567
891011121314
15161718192021
22232425262728
293012345

导航

公告

【自我介绍】 08年南开大学硕士毕业 最近关注:算法、Linux、c++、高并发 爱好:滑旱冰、打乒乓球、台球、保龄球

常用链接

随笔分类(139)

文章分类

我常去的网站

技术博客(都是大牛)

技术站点

搜索

积分与排名