By Fredrik Kalseth,Senior Consultant at Capgemini in Stavanger

AGILE .NET PROJECTANATOMY OF AN

TH

IS IS

NO

T A

BIO

LOG

Y

LES

SO

N.

CASE STUDYDevin Exposé, a Content Managment System

PRINCIPLESDESIGN

SO

LID

AR

CH

ITE

CTU

RE.

ONION ARCHITECTUREA modern approach to n-tier architecture.

Domain Model

Domain Services

Application Services

User interface Layer

Infrastructure

Tests

Application Core

OR

M

Database

Message Bus

Test

Fixture

DTO /

ViewModel

ClientASP.NET,

ASP.NET MVC, WPF...

External

Systems

Continous

Integration

Server

TFS, Team City, Cruise Control...

Mes

sage

/

Even

t

nHibernate, LLBLGEN, Linq To Sql, XPO...

NServiceBus

, MassTransit, proprietary...

Anti Corruption Layer

Directi

on of Flow (D

IP)

Domain Model

Domain Services

Application Services

User interface Layer

Infrastructure

Tests

Application Core

LinqToSqlRepository<T>

MediaItemVM

MediaItemTag

MediaStorage

UploadMediaItemView

IMediaStorage

IUnitOfWork

DataContext

MediaItemUploader

IRepository<T>

MediaItemController

When_uploading_MediaItem

MediaItem

DEPENDENCY MANAGEMENTFollow the Dependency Inversion Principle.Manage dependencies using an IoC framework.

OBJECT/RELATIONAL MAPPINGRows in a database are just data. Objects are data (state) + behavior.

PROCESSDEVELOPMENT

IT’S

SO

FTW

AR

E

CR

AFT

MA

NS

HIP

.

TEST DRIVEN DESIGNDrive the implementation of important/complex use cases through unit and integration tests.

PROJECT STRUCTUREFew projects = faster builds.Separate assemblies != loose coupling!

BRANCH BY FEATURESeparate concerns. Merge continously.

Trunk

F12 Branch F14 Branch

F13 Branch

F15 Branch

Merge from trunk

Merge from other branch

Feature branch

CONTINUOUS INTEGRATIONMerge frequently. Build merged code frequently. Test built code frequently.

DEMONSTRATIONFixing a bug the agile way.

THE ENVELOPEPUSHING

LEA

P A

HEA

D.

DISTRIBUTED SOURCE CONTROLSource control everywhere.

AUTOTESTINGContinously running tests in the background.

CONTINOUS DEPLOYMENT“On average we deploy new code fifty times a day.” - Timothy Fitz, IMVU

PROJECT MONITORINGSmeedee, an open source project monitor.

Read my blog

http://iridescence.noFollow me on Twitter

http://twitter.com/fkalseth

Fredrik Kalseth,Senior Consultant at Capgemini in Stavanger

FOR STAYING AWAKE!THANK YOU

STU

NN

ED

SIL

EN

CE

. A

PPLA

US

E?