Component based software development

SC2 - Software Core for Computer-based systems

Component based software development


2Component based development

Objective Large distributed systems Tools chain Large distributed systems Architecture

Business Model Component Execution Model

CCM Object Deployment Container Concepts


3Objective

Large distributed systems development cost reduction implies: Programming by assembly (manufacturing)

rather than development (engineering) Reduced skills requirements Focus expertise on domain problems Improving software quality







5Component Based development for complex systems Develop large software systems like :

Hardware Car

Manufacturing rather than engineering Product line Assembly line Tools chain

DevelopmentPhase

ProductionPhase

timeEngineering

Product line

Reuse


6Complex system : ATC centre

Flight PlanProcessingFlight Plan

Processing

SupervisoryControlSupervisory

Control

SimulatorSimulator

RecordingReplayRecording

Replay

controllerWorkingPosition


Radar Data ProcessingRadar Data

Processing

Radar FrontProcessingRadar Front

Processing

Dual LANFDDI

AFTN/CIDINATFM

ADJACENTFIR'S/TWR'S

MET Centres

Voice control and

communicationsVoice control

and communications

• Intercom• Priority• Public• RADIO A/G



~ 50

RADAR


7Complex system : Combat Naval System

Radar detections

Tracks display

Detections processed into tracks by the CMS







9

UML

Visual Tools

Tool chain : Computer Aided System Design


10Hardware Components Analogy

Component Library

Data Sheet


11Domain Components

Component Library

Data Sheet

CWP

RDP

FDP

CP

FPM

TP

RADAR

ADS-B

AGDC

ACR

ABS


12Computer aided design for the whole process

Integration

Validation

Operation

Development

Design


13From Design, Deployment, Installation, to Validation

IBM Compatible

IBM Compatible

Mac SE/Classic

Sun SPARC

Monitor

DECstation

IBM RS/6000

System EngineerArchitect

Visual design ToolSimulation Tool

System Integrator

Visual Deployment ToolValidation Tool

Design Model Deployment Model


14System Design Visual Tools

IDL XML

System Engineer,Architect

Validationpatterns

MOF/XMI

Simulation Tools

Design Model


15System Deployment and Integration

IDL

Container

XML

IBM Compatible

IBM Compatible

Mac SE/Classic

Sun SPARC

Monitor

DECstation

IBM RS/6000

System Integrator

COTS

zipfile

Validationpatterns

XMI

zipfile







17

FlightManagement

Surveillance

ODSSup

Recording

Recording

Surveillance

ODSSup

Mouse ClickSystem Development


18System Architecture

A business model Domain engineering Domain services specification

No assumption on Execution Platform(separation of concerns)


19

A component execution model(seamless integration) Components interconnection CORBA component model (CCM)

Container

System Architecture

A business model Domain engineering Domain services specification

No assumption on Execution Platform(separation of concerns)







21A Domain Service = A CORBA Object

A service (CORBA Object) is defined by : An Interface Interface A protocol Behavior

Described in UML

Without any assumptions on : Execution

Platform(separation of concerns)


22No assumption on deployment

Implementation Interface

A driver doesn't care of engine's internal working.He only knows the interface


23No assumption on deployment

Implementation Interface

A driver doesn't care of engine's internal working.He only knows the interface







25What We May Have :

Service DService C

Service A

Service B

Service E


26Spaghetti PlateSyndrome

NamedPipe

ReliableMulticast

Spaghetti Plate

System Architect System Integrator


27

FlightManagement

Surveillance

ODSSup

Recording

Recording

Surveillance

ODSSup

What We Want !

Seamless Integration


28Container Model

Technical Middleware (Framework)

ContainerContainerContainerContainerContainer

AutomaticallygeneratedContainer

from Object IDL

ObjectIDL

Generated Typed Local Interfaces

Spaghetti Plate







30 Component and CORBA object

A component is a deployable objet

Client Object Object

Object

Object

Provides

uses

As specified


31Component and object


Client Object ?

?

?

Provides

uses

As deployed


32Object Interface (IDL CORBA 2)

interfaces..

UsualCORBA object


33 Component Interface (IDL CORBA 3)

Provides {interfaces..

}

UsualCORBA object


34


}

uses {interfaces..

}

Component Interface (IDL CORBA 3)

Connection toa Usual

CORBA Object

UsualCORBA object


35

Client Server

Server

Server

Provides Uses

Object

Object Composition

IDL

IDL CORBA 2IDL

IDL CORBA 2

IDL

IDL CORBA 2


36

IDL

IDL CORBA 2IDL

IDL CORBA 2

IDL

IDL CORBA 2

IDLIDL CORBA 3

Client Server

Server

Server

Provides Uses

Object

Object Composition


37

Client Server

Server

Server

Provides Uses

Object

Object CompositionIDL


}

uses {interfaces..

}

IDL CORBA 3


38CORBA Component Model (CCM)

Extension to IDL (IDL2 Meta Type) «packaging» language

Offered functionality (Server role)interfaces providedevents emitted

Configuration attributes

Define a component in terms of...

Dependencies (Client role)distant interfaces requiredevents consumed

CCM IDL “IDL3”


39CCM : Code Generation

Compiler

Idl2

An IDL2 interface Defining interface

between component and container

Middleware, Framework independent

Container

Container code Provides the glue

between application and infrastructure

“IDL3” is parsed, producing :IDL3


40CORBA Component Model IDL

IDL3 provides :• logical architecture

• logical connectivity

• dependency visibility


41CORBA Component Model (CCM)

Container handles, Component interconnection Event issues Config / packaging issues Other functions

Local IDL (local service ie no IOR)

Component is isolated from the underlying architecture (framework).

This is a standard & formal way of creating wrappers.

CCM Container








Container Concepts Component container Interaction Object Deployment Separation of concerns Container Technical Framework Flexible Container Code Generation


44Component/Container interaction

Container interacts with Component

Component interacts with

container

Container interacts with other container

Components exchange

information


45Container Model

Clear separation of

the application component

the technical middleware

container protects the component

container offers simple interfaces to component

ComponentMiddleware

Infrastructurecontainer


46Container/Infrastructure interaction

Middleware (Infrastructure, Framework)

Container interacts with ComponentContainer interacts

with InfrastructureContainer interacts with Infrastructure

Components exchange information Through

Infrastructure ServiceContainer interacts with other

Container Through Infrastructure Service

Component interacts with

container

Container interacts with other container

Components exchange

information





48Container and object deployment


Client Object Object

Object

Object

Provides

uses


49

Spaghetti Plate

Container and Object Deployment

03Client Objet O1 02


50

Spaghetti Plate

Container and Object Deployment

03Container

O1 02Client Objet





52Container and separation of concerns : without container

03Objet O1 02

BusinessCode

BusinessCode

TechnicalCode

TechnicalCode

TechnicalCode


53Container and separation of concerns : with container

03Container O1 02

BusinessCode

BusinessCode

TechnicalCode

TechnicalCode

TechnicalCode

Object


54

IHM Server ServerHMI ??? ?????

Container and separation of concerns : determinism

•Simplification of business coder’s work

•Automation of technical services: tracing, recording

=> Validation Determinism

Request (Data)

Reply

Trace (Data)

Trace (Data)

Record (Data)

Record (Data)

Request (Data)

Reply

Request (Data)

Reply

ServerContainer

HMIContainer





56

Con

tain

er C

on

tain

er

Middleware services

Enterprise computing CCM container

BusinessApplication

Event Persistence Security Transaction


57

Con

tain

er C

on

tain

er

Middleware services

Real Time computing CCM container

BusinessApplication

Tracing RecordingLoad

BalancingFault

Tolerance


58

Con

tain

er C

on

tain

er

Middleware services

Extended Real Time computing CCM container

BusinessApplication

DDS ? ? ?





60Flexible Container Code Generation

Compiler

Idl2Container

IDL3

Template

TemplateDriven

Code generation

WrittenBy middleware

Experts



Compiler

Idl2

IDL3

C++Template

C++Container



Compiler

Idl2

IDL3

AdaTemplate

AdaContainer



Compiler

Idl2

IDL3

ValidationTemplate

ValidationContainer


64Infrastructure Interchange

Validation Container

Validation Framework

Operational Container

Operational Framework

Validation template written by Validation experts


65Infrastructure Interchange


Validation Framework

Operational Container

Operational Framework

Operational template written by Validation experts


66System Design and Simulated validation

System Engineer,Architect

Simulation Tools

Design Model


MOF/XMI

Operational ContainerValidation

Pattern


67

BusinessModel

FunctionalModel

Non FunctionalModel

FunctionalSimulation

Results

Non FunctionalSimulation

Results

Container

= =

System

Deployment

System Design and Simulated validation


68

RealTime

LoadBalancing

EventsDDS

FaultTolerance

FaultTolerance

LoadBalancing

DDS

Component Based Middleware

Events