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@hschwentner IT’S ALL ABOUT THE DOMAIN, HONEY! Fachliche Architektur In hoher Qualitaet durch Domain-Driven design

IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

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Page 1: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

@hschwentner

IT’S ALL ABOUT THE DOMAIN, HONEY!

Fachliche Architektur In hoher Qualitaet durch Domain-Driven design

Page 2: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

@hschwentner

Was ist dasfür 1 Design?

Page 3: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

@hschwentner

Vong Domain her

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HENNING

Page 8: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

SCHWENTNER

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@hschwentner

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@hschwentner

speakerdeck.com/hschwentner

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Quelle:http://www.schulbilder.org/malvorlage-informatiker-i10418.html

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Foto

: H

ennin

g S

chw

entn

er

Page 19: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

Fritz&Franz&Lothar&Philipp.

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Foto:Steindy/W

ikipedia

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Wilhelm Paula Siegfried

Foto:Lotse/W

ikipoe

dia

Page 35: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

Vong WPS her

Foto:

Lotse/W

ikip

oedia

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@hschwentner

@wps_de

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»Business-Softwaredie Spaß macht«

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»Business-Softwaredie Spaß macht«

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@hschwentner

Inhalt

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Domain Model

BausteineDomain EventAggregate

Entity

Value Object

Bounded Context

Strategic Design

Context Mapping

Ubiquitous LanguageDomain Expert

Event Storming

Factory

Tactical Design

Page 52: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

MicroservicesCQRS

Hexagonal Architecture

AgileEvent SourcingExtreme Programming

Scrum

Design by Contract

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Foto:G

emeinfrei/P

ixabay

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Foto:

Rabe!/

Wik

ipedia

Page 56: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

Foto:

Xocola

tl/

Wik

ipedia

Page 57: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

Ent

wur

f: K

arl P

egla

u/G

emei

nfre

i

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@hschwentner

Software != Selbstzweck

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?

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Software

Domäne

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Fach-

wissen

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GroßKlein

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BIG

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Bounded Context

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SMALL

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public class Konto{

//...}

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public class Konto{

public void zahleEin(Betrag b)//...

}

Page 89: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

public class Konto{

public void zahleEin(Betrag b)//...public void zahleAus(Betrag b)//...

}

Page 90: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

�

Page 91: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

public class Konto{

public void setSaldo(Betrag b)//...

}

�

Page 92: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

public class Konto{

public void setSaldo(Betrag b)//...

}

�

Page 93: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

Fach-sprache

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@hschwentner

Technische Sprache

Page 97: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

X

Class

Database

Server

Client

O/R-Mapping

Inheritance

A

B

Method

Interface

Linux

Windows

Eclipse

VisualStudio

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@hschwentner

Fachsprache

Page 100: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

Container

Containernummer

4300

Kran

Twistlock

Frachtbrief

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Fachbegriff

Fachbegriff

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Technik

Technik

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Ubiquitous Language

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Allgegenwärtige Sprache

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Containernummer

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Containernummer

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Containernummer

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CNR

Page 111: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

public class Containernummer{

//...}

Page 112: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

Containernummer

public class Containernummer{

//...}

Containernummer

Containernummer

Page 113: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

“ThereareonlytwohardthingsinComputerScience:

cacheinvalidationandnamingthings.”

PhilKarlton

Page 114: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

“ThereareonlytwohardthingsinComputerScience:

cacheinvalidation,namingthings,

andoff-by-oneerrors.”

PhilKarlton

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Brett

König

Figuren

Spieler

Schachuhr

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Brett

Figuren

Spieler

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Brett

Figuren

Spieler

NichtmenschlicherSpieler

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http://www.domainstorytelling.org

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http://www.domainstorytelling.org

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@hschwentner

Tactical Design

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Entity

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Auch: Business Object

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@hschwentner

Identität

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Versicherungspolice

UrlaubsantragBaumaßnahme

Kaufvertrag

Fahrauftrag

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Value Object

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Postleitzahl

GPS-Koordinate

IBAN

Containernummer

IATA-Code

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DomainEvent

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AggregateEntity(Wurzel)

Entity

Entity

ValueObjectValueObject

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Service

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@hschwentner

WAM

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Entwurfsmetaphern

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Foto:

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of

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Foto:

Chris

toph M

ichels

/W

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Material

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Foto:

MrX/W

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edia

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Foto:

Silsor/W

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Werkzeug

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Foto:

Wolf

gagn

Lonie

n/W

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Automat

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@hschwentner

Material == passiv

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Foto:

Chris

toph M

ichels

/W

ikip

edia

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Foto:

MrX/W

ikip

edia

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@hschwentner

== aktiv

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Foto:

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n/W

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@hschwentner

Strategic Design

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“Organizationswhichdesignsystems

areconstrainedtoproducedesigns

whicharecopiesofthe

communicationstructuresof

theseorganizations.”

MelvinConway

Page 189: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

MelvinConway

(1967)

“Organizationswhichdesignsystems

areconstrainedtoproducedesigns

whicharecopiesofthe

communicationstructuresof

theseorganizations.”

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“Theorganizationofthesoftwareand

theorganizationofthesoftwareteam

willbecongruent.”

EricRaymond

Page 191: IT’S ALL ABOUT THE DOMAIN, HONEY! - Entwicklertag · Melvin Conway. Melvin Conway (1967) “Organizations which design systems are constrained to produce designs which are copies

“Ifyouhavefourgroupsworkingonacompiler,

you'llgeta4-passcompiler.”

EricRaymond

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Micro-serviceA

UI

Entities

ValueObjects

Services

Micro-serviceB

UI

Entities

ValueObjects

Services

Micro-serviceC

UI

Entities

ValueObjects

Services

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Micro-serviceA

Präsentations-Schicht

Fachdomänen-Schicht

Infrastruktur-Schicht

Applikations-Schicht

Micro-serviceB

DirekterZugriffAufdieDB

Micro-serviceC

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�

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@hschwentner

Literatur

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@hschwentner

speakerdeck.com/hschwentner

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https://entwickler.de/online/development/gratis-lesen-entwickler-kiosk-themen-dossier-domain-driven-design-579749361.html

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@DDDgerhttps://dddgermany.herokuapp.com

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Germanysfirst DDDconference

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@hschwentner

Tutorium am Mittwoch

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WorkshopDomain-Driven Designkonkret

wps.de/ddd

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@hschwentner Foto

: H

ennin

g S

chw

entn

er

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@hschwentner

Rabatt!

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@hschwentner

FEEDBACK

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@hschwentner

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Henning Schwentner

[email protected]@hschwentner

�!


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