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Sequence Diagrams

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Page 1: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and

Sequence Diagrams

Page 2: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and

Introduction

• A Sequence diagram depicts the sequence of actions that occur in a system.

• The invocation of methods in each object, and the order in which the invocation occurs is captured in a Sequence diagram.

• This makes the Sequence diagram a very useful tool to easily represent the dynamic behavior of a system.

• A Sequence diagram is two-dimensional in nature. On the horizontal axis, it shows the life of the object that it represents, while on the vertical axis, it shows the sequence of the creation or invocation of these objects.

Page 3: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and
Page 4: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and
Page 5: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and
Page 6: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and
Page 7: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and

Synchronous vs. Asynchronous calls

Page 8: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and
Page 9: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and
Page 10: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and
Page 11: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and

Example 2: Courseware Management System

See the address book example here:http://www.math-cs.gordon.edu/courses/cs211/AddressBookExample/Sequences.html

http://www.math-cs.gordon.edu/courses/cs211/AddressBookExample/Sequences.html
http://www.math-cs.gordon.edu/courses/cs211/AddressBookExample/Sequences.html
Page 12: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and

Example 3: Course Enrolment System

Page 13: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and

Example 4:Product Order

Page 14: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and

Example 5: Search Engine

Page 15: Sequence Diagrams. Introduction A Sequence diagram depicts the sequence of actions that occur in a system. The invocation of methods in each object, and

QUESTIONS


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