Logistics E-mail UML 2 Should have received mail from me. If - - PDF document

UML 2 Logistics

• E-mail

– Should have received mail from me. – If not:

• Check LDAP entry
• Indicate on attendance sheet

Announcements

• It’s Co-op time

– Orientation

– Wednesday, Sept 17th, 4:00 pm – 5:30 pm, 77- A190 – Thursday, Sept 18th, 12:00 pm – 1:30 pm, 70- 1455 – Friday, Sept 19th, 1:00 pm – 2:30 pm, 76- 1125 – Friday, Sept 26th, 1:00 pm – 2:30 pm, 76- 1125 – Tuesday, Oct 7th, 1:00 pm – 2:30 pm, 76- 1125 – Wednesday, Oct 22nd, 4:00 pm – 5:30 pm, 77- A190

• Job Fair

– Wednesday, Oct 15, 1-6pm, Clark Gym

Plan for today

• Building a software system

– Documenting your design using UML – Last time we looked at:

• Class Diagram
• Use Case Diagram

– Today

• Sequence Diagram
• Rose Demo

Class Diagram – Summary Use Case – Relationships

Sequence Diagram

• Messages

– A communication between objects – Types:

• Call and return – Calls a method on an object and waits for it’s

return

• Create action – creates a new object
• Destroy action – destroys an existing object
• Send – A signal is sent to an object. Asynchronous! Sending
• bject does NOT wait for ack or return
• A Sequence Diagram illustrates time ordering of

messages that go back and forth between objects in performing a given scenario

Sequence Diagram Sequence Diagram – Messages

• Return values – dotted arrow

Destroy – object Xed out

Object 1 Object 2

action() return type

Object 1 Object 2

destroy

Sequence Diagram – Messages

Create – object suddenly appears

Object 1 Object 2

create

Sequence Diagram – Messages

• Send – Half arrow

Objects / classes can talk to themselves

Object 1 Object 2

action()

Object 1

action()

Sequence Diagram -- Summary

• Illustrates time ordering of messages that go

back and forth between objects in performing a given scenario

– show examples of important interactions; they are not graphical representations of method code

• Questions

The Microwave Example

• There is a single control button available for the

user of the oven.

– If the oven door is closed and you push the button, the

• ven will cook (energize the power tube) for 1 minute.

– If you push the button at any time when the oven is cooking, you get an additional minute of cooking time. – Pushing the button when the door is open has no effect. – Opening the door stops the cooking and clears the timer to 0.

The Microwave Example

• There is a light inside the oven.

– Anytime the oven is cooking, the light must be turned on. – Any time the door is open, the light must be on. – If you close the door, the light goes out. – If the oven times out, it turns off both the power tube and the light. It then emits a warning beep to tell you that it is finished.

Demo time

• Example / demo of building UML diagrams

using Rational Rose.