1. Sequence Diagram

2. Introduction Dynamic View State chart Diagram Collaboration Diagram
Sequence Diagram
آزمايشگاه سيستم هاي همشمند

3. Sequence & Collaboration Diagram
describe the flow of messages between objects.
Sequence Diagram: focus on the order in which the messages are sent
Collaboration Diagram: emphasizes the relationships between the objects

4. Sequence Diagram showing concurrent multi-threaded interactions.
finding race conditions in concurrent systems

5. Notation Objects or Acotors Lifelines
Activations box (method-invocation boxes)
Messages

6. Notation [sequence number]
<<Create>> ,<<Destroy>> , C++ , C# & java garbage collection
Return value
Dashed line message with a label
Method name : return value
Loop
Send message to itself

7. Type of Message
Asynchronous:  the sender doesn’t wait for the result of the message
 hardware devices, autonomous software services
Synchronous: sender waits for the result before continuing on

8. Another Notation

9. Example (condition UML 1.x)
Condition to one message

10. Example (condition UML 2)
group of messages

11. Combined Fragment (UML 2)
Alternative (alt) : model if, else
Option (opt)
Loop (loop) : [minint=no, maxint=no]

13. Example