Component-Based Software Engineering Dr R Bahsoon 1 Revision Session Component-Based Software Dr. Rami Bahsoon School of Computer Science The University.

Component-Based Software Engineering Dr R Bahsoon

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Revision Session

Component-Based Software

Dr. Rami BahsoonSchool of Computer Science

The University Of [email protected]/~rzb

Office 112 Y9- Computer Science


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Assessment & Exam Structure

• Examination 80%• Group Presentations & Group Coursework 20%• Exam Structure – 1.5 hrs exam

– Part I – Content Questions [32%]• Answer FOUR Questions out of SEVEN• Provide BRIEF AND PRECISE answers• 8% Each

– Question 1 to Question 7

– Part II – Modeling Questions [68%]• Three Main Questions

– Question 8 [9%]– Question 9 [26%]– Question 10 [33%]


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Exam Content – Part I

• Part I- Questions are mainly derived from– Unit 1: Essentials to CBS

• Components, characteristics, Interfaces, Specification, Interface Description Language (IDL), Components vs. objects, architectures, Components as services, composition, Component Models, Frameworks, Middleware

• http://www.se-radio.net/podcast/2008-02/episode-87-software-components

– Unit 2: Reflection on the modeling of objects and components – Unit 3: Engineering CBS – Process & Lifecycle

– Rational Unified Process– Model-driven development – Reuse-driven software development and landscape– Component-based software lifecycle


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Part I- Sample Question

• Briefly explain the concept of Model-Driven Architectures (MDA) and highlight a major advantage of adopting such a paradigm for engineering components-based software systems. [8%]

Answer?


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Part I – Sample Question - Answer

• A model is a description of a system.• A PIM describes a system without any knowledge of the

final implementation platform.• A PSM describes a system with full knowledge of the

final implementation platform.• A transformation definition describes how a model in a

source language can be transformed into a model in a target language.

• A transformation tool performs a transformation for a specific source model according to a transformation definition.

• Advantages?


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Part II – Modeling

• Modeling Objects and Components using UML– Interpreting UML diagrams– Modeling – In the spirit of your Coursework


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Part II – Sample 1

• Interpreting UML diagrams– In FEW words, explain the relation in the below

diagrams.


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Answer

Composed of 64 squares


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• Draft a use case diagram for an online library system. Make use of both <<include>> and <<extend>> stereotypes. State any necessary assumptions you make.

Answer?


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• Use UML to model the components and interfaces corresponding to the given Scenario– Assume that Bob wants to book a holiday

• Bob will book his holiday, where– He provides the following data: His origin airport, his

destination, his dates of departure/return, and any other preference information (e.g., budget, luxury, etc)

• Bob is interested in promotional offers for the period of his holiday

– He wants to rent a car at his destination.– He wants to get good hotel deals during his stay.


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Flight Booking service

Hotel Promotional Service

Car Hire Promotional Service

Sketch the components and interfaces corresponding to the given services


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Software Systems Requirements

• After you book a holiday, the company shall provide the holidaymaker with promotional services, which include hotel deals and car rent promotional service at the destination and for the duration of her/his stay


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Answer: Flight Booking

ProvidesRequires

Flight Booking

Flight Information

Customer Preference Information

Customer data


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Promotional Hotel Booking Service..

ProvidesRequires

PromotionalHotel BookingService

List of available Hotels

Flight Information



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You can even provide more services..

ProvidesRequires


List of available HotelsList of BudgetHotel

List of Five stars

List of B&B

List of 3 stars

Flight Information



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ProvidesRequires


List of available Car agents

Flight Information


List of cars deals


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Gluing the Components

ProvidesRequires

Flight Booking

Flight InformationCustomer Preference InformationCustomer

data

ProvidesRequires

Car Hire Promotional

Service

List of available Car agents Flight

Information


List of cars deals

ProvidesRequires


List of available HotelsList of BudgetHotel

List of Five star

List of B&B

List of 3 stars

Flight Information



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• Sketch a sequence diagram for self-service machine, three objects do the work we're concerned with – the front: the interface the self-service machine

presents to the customer– the money register: part of the machine where

moneys are collected – the dispenser: which delivers the selected

product to the customer• Derive your collaboration diagram

Part II - Sample 3


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Part II- Sample 4

• Sketch a three-tier architecture for online banking system

• Sketch a client-server architecture for online inventory system


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Example of Three-Tiers Architectures

Many of real life web applications have three tier architectures


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Deployment Diagrams for Three Tiers

UML 1.4

Com

pon

en

ts d

ep

loyed

in

an

arc

hit

ectu

re


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Example: Client Server Architectures


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Example: Deployment Diagram for a Client Server Architecture

UML 2.0


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Q&A

• Question and Answer Session• Flipping through the slides?

Component-Based Software Engineering Dr R Bahsoon 1 Revision Session Component-Based Software Dr. Rami Bahsoon School of Computer Science The University.

Documents

softwarecomponents unit

component models

sample question

coursework slide

cbs components

modeling questions

modeling modeling objects

main questions question