Component-Based Software Engineering

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Component-Based Software Dr. Rami
BahsoonSchool of Computer ScienceThe University
Of Birminghamr.bahsoon_at_cs.bham.ac.ukwww.cs.bham.
ac.uk/rzbOffice 112 Y9- Computer Science

• Revision Session

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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.
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• 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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Part II Sample 1

• Draft a use case diagram for an online library
  system. Make use of both ltltincludegtgt and
  ltltextendgtgt stereotypes. State any necessary
  assumptions you make.
• Answer?

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Part II Sample 2

• 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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Part II Sample 2
Sketch the components and interfaces
corresponding to the given services
Flight Booking service
Hotel Promotional Service
Car Hire Promotional Service
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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
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Promotional Hotel Booking Service..
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You can even provide more services..
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Car Hire Promotional Service
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Gluing the Components
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Part II - Sample 3

• 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

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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
Components deployed in an architecture
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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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QA

• Question and Answer Session
• Flipping through the slides?