Component-Based Software Engineering(CBSE)

Xingui TangCS532, Fall 2003

04/22/23

Content Introduction

Component Software component Component-based Software engineering

Component-based software construction Typical CBD Process Model Introducing and Establishing CBSE from an Organizational View

Three phases Requirements

Pros and cons of CBSE Conclusion Reference

Introduction Component

Introduction ----Cont.

ComponentA component is a nontrivial, nearly independent, and replaceable part of a system that fulfills a clear function in the context of a well-defined architecture. It conforms to and provides the physical realization of a set of interfaces.

--- Philippe Krutchen

Introduction ----Cont.

Software component Definition

A software component is a unit of composition with contractually specified interfaces and context dependencies only. It can be deployed independently and is subject to composition by third parties. ---Clement Szyperski

A software component is a software element that confirms to a component model and can be independently deployed and composed without modification according to a composition standard. ---Bill Councill and George T. Herneman

Introduction ----Cont.

Software component Feature

Identity Modularity and encapsulation Contact-based interface Independent deliverability Reusability Interoperability Deployability

Introduction ----Cont.

Component-based Software engineering Definition

Component-based Software engineering denotes the process of building the software by (re)using pre-built software components thus basing on the meaning of software components.CBSE is also referred to as component based software development (CBSD) or component-based development (CBD).

Introduction ----Cont.

Component-based Software engineering Why need it

software exists problems SW is late SW is buggy SW is expensive SW is difficult to understand SW is difficult to maintain

CBSE can solve the problems Focuses on reuse of subsystem and infrastructure

Component-based software construction

Type 1

Component-based software construction ----Cont.

Type 2

Component-based software construction ----Cont.

Type 3

Typical CBD Process Model

Introducing and Establishing CBSE from an Organizational View

Three phases

Introducing and Establishing CBSE from an Organizational View ----Cont.

Requirements CBSE approach must include

reuse component selection component test requirements reconciliation

CBSE must be supported by modeling formalisms and tools development tools

Pros and cons of CBSE Pros

Increased Reliability Reduced Costs and Development time Promotes Software Reuse Reduced Maintenance Costs

Cons Lack of world wide standards Lake of flexibility in the system design Hard to meet the demands of high reliability

and availability Requires skilled people

Conclusion

Promising Challenging

Reference: D’Souza, D. F., and Alan C. Wills "Objects, Components, and Frameworks with UML the Catalysis Approach”,

ISBN 0-201-31012-0 Addison-Wesley, 1998 Philippe Kruchten , “modeling component systems with the unified modeling language”, a position paper for

icse’98 workshop Kyo C. Kang, “Issues in component based software engineering”, 1999 international workshop on component

based software engineering. Guido Schryen, “Component-based Software engineering(CBSE) from an organizational point of view” Ivica Crnkovic, “Introduction to Component-based Software engineering” G.T. Heineman, W. Councill, “CBSE putting the Pieces Together” Peter Herzum, Oliver Sims, “A Comprehensive Overview of Component-Based Development for the Enterprise” Ivica Crnkovic, Magnus Larsson, “Overview Component-based Software engineering State of the art Report” Lim Wayne, “Managing software reuse – a comprehensive guide to trategically reengineering the organization

for reusable components”, PrenticeHall 1998. Jacobson Ivar, Griss Martin, Johnsson Patrick, “Software Reuse – Architecture, Process and Organization for

Business Success”, ACM Press 1997. Sametinger, Johannes, “Software engineering with reusable components”, Springer 1997. http://www.cigital.com/conferences/ecbs02/Euromicro CBSE track http://www.euromicro.org/Upcoming.html http://www.idt.mdh.se/ecbse/

Any questions?

Thanks!