Time Sequence Diagram Dr. Zhen Jiang West Chester University

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Presentation transcript:

Time Sequence Diagram Dr. Zhen Jiang West Chester University E-mail: zjiang@wcupa.edu url: www.cs.wcupa.edu/~zjiang

Time Sequence Diagram A sequence diagram is an interaction diagram that focuses on the time ordering of messages A vertical dashed line is used to represent the lifetime of an object (it’s the object’s lifeline) A focus of control is a tall, thin rectangle that shows the period of time during which an object is performing an action

requestLdgClearance(r) It’s a repetition of associate member function Any object of class Pilot : Pilot : ATC : Radar requestLdgClearance(r) checkWeather * Asynchronous action checkRunwayClear(r) clear clearance Synchronous action Focus of action

An Example of Time Sequence Diagram

Another Example

Another Example