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© Daniel Fisher

Komponenten und Konsequenzen

Daniel Fisher | info@lennybacon.com

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Daniel Fisher

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EFFICIENT COMMUNICATION…

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No more monoliths

https://www.flickr.com/photos/senorwences/2366892425

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https://www.flickr.com/photos/inju/2647397230

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Change must be cheap

https://www.flickr.com/photos/smull/432813187

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Feedback must be fast

https://www.flickr.com/photos/thatguyfromcchs08/2300190277

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Component-based software engineering is a branch

of software engineering that emphasizes the

separation of concerns in respect of the wide-ranging functionality available throughout a

given software system.

http://en.wikipedia.org/wiki/Component-based_software_engineering

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It is a reuse-based approach to defining,

implementing and composing loosely coupled independent components into systems.

This practice aims to bring about an equally wide-ranging degree of

benefits in both the short-term and the

long-term for the software itself and for

organizations that sponsor such software.

http://en.wikipedia.org/wiki/Component-based_software_engineering

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Sorry this is *NO hot shit*!

The idea first became prominent with

Douglas McIlroy at the NATO conference on software

engineering in Garmisch, Germany,

1968

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http://enterprisecraftsmanship.com/2015/01/10/how-to-build-microservices-wrong

What about micro services?

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Don't reinvent the wheel!

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‘Nuf bla bla!

So what’s a component?

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https://www.flickr.com/photos/64693712@N05/8059145606

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Divide and Conquer

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Separation of ConcernsSingle Responsibility

…Clean Code

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https://www.flickr.com/photos/lynsey_wells83/11054897226

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https://www.flickr.com/photos/miasone/8741413785

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Explicit boundariesAutonomous

Shared schema and contractCompatibility through Policy

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Ensure separation

• Ndepend– http://www.ndepend.com/

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Component Component Component

Domain ServicesDomain Objects

APIAPI

DD

DTE

C

Layers

Value Objects

Aggregate Root

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The only thing

really hard is making things

really easy

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https://www.flickr.com/photos/shardayyy/5711563136

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Dependencies

Core

Directory

Data

DataModel Diagnostics

ComponentModel

DataModel.Data

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https://www.flickr.com/photos/archivesnz/8759939806

Source Control Repositories

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Branch Strategy

Branch for stability Commit for stability

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Usual Repository

Class Library Test Sample Class Library

Class LibrarySample Test Test

Class Library Test Sample Class Library

Class LibraryExecutableSample Class Library

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Component Repository

Class Library Test Sample

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Pros

• You just work with what you need• Separation of concerns from the

beginning

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Cons

• There will be lots of repositories• There will be multiple histories/logs

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Consequences

• The need for a flexible SCM• Aggregated feeds of history/logs

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Flexible version control

• GIT

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Tests

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Pros

• You only see and maintain relevant tests

• Feedback is delivered faster

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Cons

• Any?

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Consequences

• You need to change the way you did it before?

danielfisher.comMonolith solution or too many

tests?

• NCrunch.NET– http://www.ncrunch.net/

• Wallaby.JS– http://wallabyjs.com/

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© Daniel Fisher

Builds

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Builds

• A project consist of multiple builds– Per branch?

• Check-In• Nightly• Feature• Team• Release

It really depends on your business strategy and team organization!

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Pros

• Build can be parallelized• Feedback is delivered faster• You see where it breaks

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Cons

• There will be lots of builds• There will be even more build results

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Consequences

• Build Process that supports build trees– https://

en.wikipedia.org/wiki/Topological_sorting

• Aggregated overview of build results

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Build Servers

• Good question!

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SOS…

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Build Scripts

https://www.flickr.com/photos/frf_kmeron/3587872772

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Build ProcessCh

ecko

ut-S

ourc

es

Gen

erat

e-Co

de

Set-

Vers

ion

Com

pile

-Cod

e

Reso

lve-

Dep

ende

ncie

s

Sign

-Out

put

Pack

age-

Out

put

Publ

ish-

Pack

age

Anal

yze-

Out

put

Doc

umen

t-O

utpu

t

Test

-Out

put

Dep

loy-

Pack

age

Test

-Dep

loym

ent

Test

-Inte

grati

on

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Rake, Fake, Workflow

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IMHO

• Until you don't build value by writing build scripts avoid it

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Package Publication

https://www.flickr.com/photos/leshaines123/5422165409

danielfisher.comLatest & Greatest vs. Old &

Conservative

https://www.flickr.com/photos/thomasletholsen/11139022726

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Package Publication

• NuGet• NPM• Bower• …

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Pros

• Orchestration of releases

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Cons

• Maintenance of multiple Package Repositories?

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Bug Tracking

https://www.flickr.com/photos/goingslo/4523034319

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Software is not for itself!

• A Bug Tracker for each Product– A category/tag for each project

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Roadmap

https://www.flickr.com/photos/aigle_dore/5849712695

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Software is not for itself!

• A Feature plan for each Product– A category/tag for each project

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Versions

https://www.flickr.com/photos/jasonmichael/5396824640

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Software is not for support!

• One version number per Product for each Project

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