The Application Of Design Pattern In The Design Of FDP System

This paper discusses the design problem of the air traffic control's(ATC) subsystem — fly data process (FDP), and provides its solution. Now, the system has been adopted by many aerodromes such as shuangliu, guiyang etc.In the design of FDP, the author takes advantage of many kinds of design patterns. The author analyzes the whole structure of air traffic control system and discusses the subsystem's information exchange by network thoroughly. To provide interface in the same way for network information exchange, the author adopts factory pattern to encapsulate network packet. And the author adopts singleton pattern to ensure one instance for those who need only one instance in the system. The management of fly plan is the core task of fly data process system. The author analyzes the fly plan's state and its transformation. And the author makes use of state pattern to encapsulate fly plan's states. Strategy pattern can encapsulate a group of algorithm, and makes the algorithms to be replaced freely. The author uses this character to encapsulate the source of plan and as a decode strategy of route. The paper uses a great deal UML figure to describe the pattern's structure.The design thought in the paper not only can be used to rebuild current code, but also provide reference for later system design.