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CSC4522: Réalisation & Déploiement (Design Patterns)
TSP - 2016 1
Patron: Observerhttp://www-public.tem-tsp.eu/~gibson/Teaching/CSC4522/CSC4522-DesignPatterns-Observer.pdf
http://www.glasbergen.com
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CSC4522: Réalisation & Déploiement (Design Patterns)
TSP - 2016 2
Patron: Observateur https://fr.wikipedia.org/wiki/Observateur_(patron_de_conception)
Le patron de conception observateur est utilisé en programmation pour envoyer un signal à des modules qui jouent le rôle d'observateurs.
En cas de notification, les observateurs effectuent alors l'action adéquate en fonction des informations qui parviennent depuis les modules qu'ils observent (les « observables »).
Le principe est que chaque classe observable contient une liste d’observateurs. Ainsi à l'aide d'une méthode de notification l'ensemble des observateurs est prévenu.
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CSC4522: Réalisation & Déploiement (Design Patterns)
TSP - 2016 3
The Observer Design Pattern: any potential for use in your project work?
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CSC4522: Réalisation & Déploiement (Design Patterns)
TSP - 2016 4
The Observer Design Pattern: any potential for use in your project work?
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CSC4522: Réalisation & Déploiement (Design Patterns)
TSP - 2016 5
The Observer Design Pattern UML class diagram
Adapted From: GOF book
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CSC4522: Réalisation & Déploiement (Design Patterns)
TSP - 2016 6
The Observer Design Pattern UML sequence diagram
aConcreteSubject aConcreteObserver anotherConcreteObserver
From: GOF book
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CSC4522: Réalisation & Déploiement (Design Patterns)
TSP - 2016 7
The Observer Design Pattern: Java implementation
Question: what are the differences between the 2 implementations? 1.designpatternobserver 2.designpatternobserverwithjavautils
Problem: Examine 2 different implementations of the observer pattern in Java
http://www-public.tem-tsp.eu/~gibson/Teaching/CSC4522/SourceCode/Observer.zip
(Import existing project into Eclipse)
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CSC4522: Réalisation & Déploiement (Design Patterns)
TSP - 2016 8
The Observer Design Pattern: Mediatheque ProblemIn the mediatheque,we are adding a use case that can be added to the implementation through use of the observer pattern. Your task is to try to do this before next week’s session.