Interaction diagrams • describe how groups of objects interact • typically describe the scenario of a single use case • show – example objects – messages between them – timeline
UML-Interaction Diagrams 3
Sequence diagrams • shows object interactions arranged in time sequence – objects (and classes) – message exchange to carry out the scenarios functionality
• time line
UML-Interaction Diagrams 4
Objects in UML • Rectangle • Name (specific or general) of object is underlined – name – name & class – class (anonymous object)
Object Name History 101-Section 2 Object Name and Class History 101-Section 7: CourseOffering Class Name : CourseOffering UML-Interaction Diagrams 5
Time lines • Messages point from client to supplier CourseManager : Professor
Math 101 - Section_1 : CourseOffering
Add professor (Professor)
UML-Interaction Diagrams 6
Example: Sequence diagram
course form : CourseForm
: Registrar
aCourse : Course
theManager : CurriculumManager
1 : set course info 2 : process 3 : add course 4 : new course
UML-Interaction Diagrams 7
Sequence diagrams: More details Object creation
Iteration an Order Entry window
Condition
an Order
1: prepare()
a Stock Item
2: * prepare()
an Order Line
3: check()
4: [check = true] remove()
Asynchronous Message
5: needsToReorder()
X Object deletion
Activation
UML-Interaction Diagrams 8
Sequence diagrams : concurrent processes A Transaction
A Transaction Coordinator Transaction checker A
Transaction checker B
All done ? All done ?
UML-Interaction Diagrams 9
Self call
Asynchronous messages • Do not block the caller • Can do 3 things: – Create a new thread – Create a new object – Communicate with a thread that is already running
UML-Interaction Diagrams 10
Boundary classes • Handle communication between system and outside world – e.g. user interface or other system
• Boundary classes in interaction diagrams: – capture interface requirements – do NOT show how the interface will be implemented
UML-Interaction Diagrams 11
Complexity and sequence diagrams • KISS = keep it small and simple • Diagrams are meant to make things clear • Conditional logic – simple: add it to the diagram – complex: draw separate diagrams
Collaboration diagrams • Show objects and messages • Sequence of messages determined by numbering – 1, 2, 3, 4, ….. – 1, 1.1, 1.2, 1.3, 2, 2.1, 2.1.1, 2.2, 3 (shows which operation calls which other operation)
UML-Interaction Diagrams 14
Collaboration diagram basics
: ProfessorCourseManager 1 : Add professor (Professor)
Math 101 - Section 1 : CourseOffering
UML-Interaction Diagrams 15
Collaboration diagram example 1 : set course info 2 : process
course form : CourseForm
: Registrar
3 : add course
theManager : CurriculumManager
aCourse : Course 4 : new course
UML-Interaction Diagrams 16
Comparing sequence & collaboration diagrams • Sequence of messages more difficult to understand in collaboration diagrams • Layout of collaboration diagrams may show static connections of objects • Complex control is difficult to express
Affecter les bonnes responsabilités Disponibilité exemplaire
Vérification titre
Emprunter Nouvel emprunt
Exemplaire emprunté
UML-Interaction Diagrams 18
Mon o po l y 30 /1 1/20 0 1 a ch ete ter rai n s chi ttl y co ud ry g ro up e 3
ca s e
Mon o po l y
j ou e ur donne la valeur du terrain
demande d'achat vérifie la disponibilité
-Objet Monopoly trop général !? -début du scénario ? Génération spontané - ne pas mélanger joueur physique avec s
vérifie la somme que possède le joueur
paye terrain
attribue terrain
UML-Interaction Diagrams 19
Di a g ra m m e d e s é q u e n ce s 0 5 /1 1 /2 0 0 1 Ac h a t p ro p ri é té
i n te rfa ce
Pro p rié té s
Jo u e u rs
Jo u e u r
Achat propriété
Propriété libre?
- pas trop de retour explicite
Confirmation
- génération spontanée ? Assez argent?
Confirmation
Propriété vendue
Comfirmation
UML-Interaction Diagrams 20
Mo n op o ly 0 3/1 2 /2 0 01 d i a gra m m e d e s é q ue n ce n °5 jo u eu r j ou e , p a s s e pa r ca s e d é pa rt e t tom b e che z l ui
cou p l e d e d és
i nte rface
b a nq u ie r
j o ue u r
cas e
co ns tru cti b le
te rrai n
p ro pri é té
d ép a rt
appelle
jette vérifie si passage par case départ donne 20KF
retire 20KF
regarde où tombe joueur
définie case où tombe joueur définit terrain où tombe joueur
-pas d’interaction entre objets, (interface objet principal !? En tous cas pas au niveau de l’analyse. -met en évidence un certain fouillis dans la description des propriétés
vérifie si propriété est libre vérifie si joueur à autre propriété de même couleur
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