Object Orientation in CBD 김현우, 장재현. Contents What is CBD? Why CBD? Process of CBD Commercial Component Using Component From CBD to SOA Summary 2.

Object Orientation in CBD

Object Orientation in CBD

김현우 , 장재현

Contents• What is CBD?• Why CBD?• Process of CBD• Commercial Component• Using Component• From CBD to SOA• Summary

2

What is CBD?

• Component-based development– Developing software system based

on component

3

Contents• What is CBD?

– Component

• Why CBD?• Process of CBD• Commercial Component• Using Component• From CBD to SOA• Summary

4

Component (1/4)

5

ImplementationImplementationSpecificationSpecification

for(i=0;i<10;i++){ a++; }return a;

for(i=0;i<10;i++){ a++; }return a;

StandardStandardPackagingPackaging

DeploymentDeployment

Component (2/4)

• Software module unit– Reusability– Replace-ability

6

Component (3/4)

• Reusability– Component can be used by some other applications

7

Hospital system A Hospital system B

Reservation

Customer

Patient

Reservation

Doctor

DiagnosisDiagnosis

Reuse

Component (4/4)

• Replace-ability– CBD can be a replacement of rapid change of

customer’s need

8

Hospital system

Reservation

Customer

Diagnosis 2

Diagnosis 1

Diagnosis 1

Replace


– Dependency & Granularity


9

Dependency (1/2)

• Tightly-coupled vs. loosely-coupled

10

Address

- homeAddress: string- homeTelno: string

+ getHomeAddress(): string+ setHomeAdress(newAddress): void+ getHomeTelno(): string+ setHomeTelno(newTelno) : void

Address

- homeAddress1: string- homeAddress2: string- homeTelno: string+ getHomeAddress(): string+ setHomeAdress(newAddress): void+ getHomeTelno(): string+ setHomeTelno(newTelno) : void

Dependency (2/2)

• Loosely-coupled– Interface– Abstraction

11

+getHomeAddress() : string+setHomeAddress(in newAddress : string) : void+getHomeTelno() : string+setHomeTelno(in newTelno : string) : void

-homeAddress1 : string-homeAddress2 : string-homeTelno : string

Addres

IAddress

1

*Customer

Interface

Granularity

• Coarse-grained

12


– Goal of CBD


13

Goal of CBD

componentcomponent

componentcomponent

componentcomponent

componentcomponent

14

Philosophy of CBD

• Philosophy– “Buy, don’t build”– LEGO®

“buy, don't build” by Fred Brooks

[Brooks 87] Brooks, F. P. Jr. “No Silver Bullet: Essence and Accidents of Software Engineering”Computer 20, 4 (April 1987): 10-9.

15


16

Why CBD?

• Productivity– reducing code generation

• Quality– using guaranteed component

• Time-to-market– faster than traditional way

17


18

Process of CBD (1/3)

Component Repository

Domain Analysis Domain Design Component Abstraction

Component DesignComponent ImplementationComponent Qualification

Component Distribution

Component SpecializationCBD DesignApplication Requirement

Component CompositionNew ApplicationNew Application

Component Development

Component-Based Software Development

19


QualificationQualification AdaptationAdaptation CompositionComposition

CQ CA CC

20


White box wrapping

Grey box wrapping

Black box wrapping

ComponentComponentAdaptationAdaptation

21

Component Adaptation (1/3)

Controller Adapter LightsRI_Lights PI_Lights

<Lights control system>


LightsPI_Lights

<<Interface>>lightG: BooleanlightG: Booleanon_green()off_green()on_red()off_red()

<<Interface>>color: ML_Colorchange(new: ML_Color)on()off()

ControllerRI_Lights


REFINEMENT AdapterREFINES RI_LightsINCLUDES PI_LightsOPERATIONS on_red = IF color = Red THEN on ELSE LET color BE color = Red IN change(color); on

Adapter


25

• International

26from IDC

Commercial Component (1/6)


• International (cont’d)

– Focus on technical components than business components

– Componentsource Inc. (ENG) – 1303 components of 293 companies

• “The world's largest source of software components”

– Flashline Inc. (USA) –227 components of 94 companies

• BEA AquaLogic enterprise repository

27


• Domestic

28from KCSC


• Domestic large company– Large SI companies develop technical components

themselves– Operate exclusive responsible team

– Samsung SDS, LG CNS, SK C&C, etc, …

29


• Domestic small company– Simple application – Homepage, Mail, BBS– Recently, even ERP, KMS, CRM

– Component Bank • Component tools, Web application

– Imeca - export to 30 countries• HRM solution, Government integrated administrative system

– N3Soft• Component tools, ERP, KMS, Web log analysis

– Namo Interactive• Web application

30

31


32

We want to detect memory leaks or know code performance and code coverage.We want to collect data on Disk I/O, Network I/O and synchronization wait time

Success story (1/2)

• CBD based integrated framework case

UML based system analysis

System architecture

Components

CBDTest

* ITPlus

Success story (2/2)

Normal

CBD

Human Resource 40% ↓TIME 50% ↓

SW Quality ↑

* ITPlus


35

Using component (1/3)

STDMETHODIMP CHello::sayHello(BSTR name, BSTR *message){

TCHAR buffer[256];_bstr_t temp = name;::wsprintf(buffer, _T("Mr. %s hello?"),

(TCHAR*)temp);temp = buffer;*message = temp.copy();return S_OK;

}

• Make HelloApp.dll ATL

ATL: Active Template Library


• Register COM+ component from dll file

Component


• in ASP– We can use another component also

<%if Not isEmpty(Request.Form("txtName")) then

Dim helloset hello = CreateObject("HelloApp.Hello.1")dim messagemessage = hello.sayHello(Request.Form("txtName"))Response.Write message

end if%>

COM+ component nameComponent procedure call


39

Limit of CBD (1/2)

• Platform-dependence

.NET Application

J2EE Application

Message Queue Middleware

SQL Server

JDBCADO .NETProvider

JMSNative

from MSDN

Limit of CBD (2/2)

• Tightly-coupled– RPC

• Synchronous – wait until return

<%if Not isEmpty(Request.Form("txtName")) then

Dim helloset hello = CreateObject("HelloApp.Hello.1")dim messagemessage = hello.sayHello(Request.Form("txtName"))Response.Write message

end if%>

Reference Procedure call

From CBD to SOA (1/4)

Interface

Component

Service

• Service is also component• CBD ≒ SOA

42


• Service-Oriented Architecture– “Web service”-based

43


Service Broker

Service Consumer

Service Provider

Publish

Connect

Discover

Internet

44

45


• Mashup

+


46

47

Summary

• CBD takes productivity, quality, reduce of cost and rapid response in market

• Recent concept of service starts from component in CBD

• Component is well-applied OO concept in business

References• Alan W. Brown, “On Components and Objects: The Foundations of

Component-Based Development”, IEEE, 1997• Bertrand Meyer, “ Component-Based Development: From Buzz to

Spark”, IEEE, July 1999• Butlergroup, “Component-Based Development”, Butlergroup

Management Guide, September 1998• George T. Heineman, “Component-Based Software Engineering”,

Addison-Wesley, 2001• Jim Q. Ning, “Component-based Software Engineering”, SAST,

1997• Michael Sparling, “Lessons learned through six years of

component-based development”, ACM, October 2000 p.47-53• 전병선 , “ 객체지향 이야기” , 영진 .COM, 2004 14 장

48

Object Orientation in CBD 김현우, 장재현. Contents What is CBD? Why CBD? Process of CBD Commercial Component Using Component From CBD to SOA Summary 2.

Documents