#Powerpoint sequence diagram code#

#Powerpoint sequence diagram code#

Execution bar – bar around lifeline when code is running.

Vertical height matters! “Lower equals Later”.

Sequence diagrams model object interactions with an emphasis on time ordering.Remember: the goal of UML is communication and understanding.Create sequence diagrams for use cases when it helps clarify and visualize a complex flow.Frequently it is better to create multiple simple diagrams.These constructs complicate a diagram and make them hard to read/interpret.What does this mean? Time=A GetDetails() Time=B Do you typically care?Ĭomponents Objects: aStudent is a specific instance of the Student class Generic (unnamed)objects Generic (unnamed)objects of class type Seminar and Course Specific Instance of an Object Coming up: ComponentsĬomponents execution lifeline Coming up: ComponentsĬomponents Method call Return value Coming up: ComponentsĬomponents c : Client o : ODBCProxy : Transaction create() setActions(a, b, c) setValues(a, 3, 4) setValues(b, c, 7) (committed) destroy() create() destroy() Synchronous message Asynchronous message Return message Coming up: Components: GuardsĪsync Message Example There are problems here… what are they? Synchronous message Asynchronous message Return message Coming up: Components: GuardsĬomponents: alt/else Coming up: Components: optionĬomponents: option Coming up: Components: loopĬomponents: loop Coming up: In class exercise.Additionally if ActivityA happens before ActivityB, ActivityA must be above activity A Lower = Later! Coming up: Componentsĭiagonal Lines :Student :Registration System Sequence Diagram Time Increasing -> All lines should be horizontal to indicate instantaneous actions. Typically used during analysis and design to document and understand the logical flow of your system Emphasis on time ordering!.Show time sequences that are not easily depicted in other diagrams.Show concurrent processes and activations.Describe the flow of messages, events, actions between objects.

Emphasize and show flow of control among objects Coming up: Sequence Diagrams.State machine consisting of states, transitions, events and activities of an object.Communication Diagrams - emphasize structural ordering.Sequence Diagrams - emphasize time ordering.Interaction Diagrams - Set of objects or roles and the messages that can be passed among them.Sequences of events Coming up: Dynamic Diagram Types.Messages moving among objects/ classes.UML Specifies a number of interaction diagrams to model dynamic aspects of the system.Sequence Diagrams Dan Fleck Coming up: Interaction Diagrams