state-of-the-union

About

Describes various php DDD and CQRS initiatives all around the universe (mainly github universe, in fact).

• DDD: stands for Domain Driven Design
• CQRS: stands for Command Query Responsibility Segregation

Resources

DDD introductions

• [en] [slides] https://speakerdeck.com/richardmiller/avoiding-the-mud
• [en] [slides] https://speakerdeck.com/mathiasverraes/unbreakable-domain-models-dpc13
• [en] [video|slides] http://www.craftitonline.com/2014/01/ddd-series-domain-vs-frameworks-symfony2-silex-cilex-yolo-et-al/
• [en] [article] http://dddsample.sourceforge.net/characterization.html
• [en] [video] https://www.youtube.com/watch?v=QaIGN_cTcc8
• [en] [video] https://www.youtube.com/watch?v=0lrPeLSq_u8
• [en] [slides] https://speakerdeck.com/jacegu/my-domain-is-mine-and-i-dont-share-it
• [es] [youtube channel] http://www.youtube.com/playlist?list=PLfgj7DYkKH3DjmXTOxIMs-5fcOgDg_Dd2
• [fr] [article] http://www.infoq.com/fr/articles/seven-modelling-smells
• [fr] [article] http://www.croes.org/gerald/blog/domain-driven-design-ddd-pour-les-intimes/866/
• [fr] [article] http://blog.octo.com/domain-driven-design-des-armes-pour-affronter-la-complexite/
• [fr] [video] http://www.youtube.com/watch?v=dV8EFyIRagA
• [fr] [PDF] http://blog.infosaurus.fr/public/docs/DDDViteFait.pdf

SOLID principle

• [en] [article] http://en.wikipedia.org/wiki/SOLID_%28object-oriented_design%29
• [fr] [article] http://afsy.fr/avent/2013/02-principes-stupid-solid-poo
• [fr] [article] http://blog.lepine.pro/php/gerer-des-regles-metiers-complexes-etou-changeantes
• [en] [article] http://williamdurand.fr/2013/07/30/from-stupid-to-solid-code/

Design patterns

• https://github.com/domnikl/DesignPatternsPHP

Code Organisation

• [en] [article] http://williamdurand.fr/2013/08/07/ddd-with-symfony2-folder-structure-and-code-first/

Bounded contexts

• [en] [article] https://github.com/beberlei/whitewashing.de/blob/master/2013/06/24/bounded_contexts.rst
• [en] [video] https://www.youtube.com/watch?v=aieoAWXNjl0

Specification pattern

• [en] [article] http://en.wikipedia.org/wiki/Specification_pattern
• [en] [article] https://github.com/beberlei/whitewashing.de/blob/master/2013/03/04/doctrine_repositories.rst
• [fr] [article] http://blog.lepine.pro/php/gerer-des-regles-metiers-complexes-etou-changeantes
• [fr] [article] http://blog.xebia.fr/2009/12/29/le-pattern-specification-pour-la-gestion-de-vos-regles-metier/

Service Layers

• [en] [slides] http://www.slideshare.net/rosstuck/models-and-service-layers-hemoglobin-and-hobgoblins
• [en] [video] https://www.youtube.com/watch?v=3uV3ngl1Z8g

CQRS / Event Sourcing

• [fr] [video] http://parleys.com/play/51b7f063e4b01033a7e4b764
• [en] [slides] http://verraes.net/2013/12/fighting-bottlenecks-with-cqrs/
• [en] [article] http://vadimcomanescu.wordpress.com/2012/06/26/cqrs-domain-events-and-ddd-review/
• [en] [article] http://msdn.microsoft.com/en-us/library/jj554200.aspx
• [en] [article] http://www.codeproject.com/Articles/555855/Introduction-to-CQRS
• [en] [article] http://coding-insomnia.com/2012/05/28/a-trip-to-cqrs-intro/
• [en] [slides] http://verraes.net/2014/03/practical-event-sourcing/
• [en] [slides] https://speakerdeck.com/stijnvnh/cqrs-or-did-you-mean-cars
• [ru] [article] http://habrahabr.ru/post/146429/
• [ru] [article] http://habrahabr.ru/post/149464/
• [en] [website] http://cqrs.nu/

Existing php frameworks/libraries integrations, discussions

Proof of concept, implementation examples

• https://github.com/TBeijen/DDD-HRM
• https://github.com/beberlei/litecqrs-php
• https://github.com/tyx/cqrs-php-sandbox
• https://github.com/idr0id/ddd-blog
• https://github.com/szjani/predaddy
• https://github.com/malocher/cqrs-esb
• https://github.com/prooph/event-store
• https://github.com/prooph/service-bus
• https://github.com/codeliner/php-ddd-cargo-sample
• https://github.com/qandidate-labs/broadway
• https://github.com/dddinphp/ddd
• https://github.com/jgimeno/taskreporter
• https://github.com/ferrius/ddd-cqrs-example

Hexagonal

Also know as Entity-Boundary-Interactor or Ports and Adapters.

• Symfony2 sample application
• Silex sample application
• Last Wishes: A Silex sample application
• Cockburn's hexagonal explains the architecture
• Chris Fidao explains hexagonal architecture
• Palermo's onion shares the hexagonal architecture

Typo3/Flow3

• [poc] https://github.com/hmrdk/Cqrs.Core

Symfony2

• [en] [article] http://williamdurand.fr/2013/11/13/ddd-with-symfony2-basic-persistence-and-testing/
• [en] [article] http://williamdurand.fr/2013/08/20/ddd-with-symfony2-making-things-clear/
• [en] [slides] http://qafoo.com/talks/13_12_symfonycon_domain_events.pdf
• [en] [article] https://romaricdrigon.github.io/2019/08/09/domain-events

Zend Framework 2

• https://github.com/prooph/ProophEventStoreModule
• https://github.com/prooph/ProophServiceBusModule

Doctrine2

• [en] [article] http://www.tibobeijen.nl/blog/2011/06/27/ddd-using-doctrine-2-a-case-study/
• https://github.com/TBeijen/DDD-HRM/tree/v001
• [en] [slides] http://qafoo.com/talks/13_12_symfonycon_domain_events.pdf

CQRS implementations in other languages

• [ruby] https://github.com/cavalle/banksimplistic
• [fsharp] https://github.com/thinkbeforecoding/FsUno
• [java] http://www.axonframework.org/

Recommended reading

DDD

• "Domain-Driven Design in PHP", Carlos Buenosvinos, Christian Soronellas, and Keyvan Akbary, 2014
• "Domain Driven Design Quickly", InfoQ.com, 2006
• "Domain-Driven Design: Tackling Complexity in the Heart of Software", Eric Evans, 2005
• "Domain-Driven Design: The First 15 Years", DDD Europe, 2019
• "Applying Domain-Driven Design and Patterns: With Examples in C# and .NET", Jimmy Nilsson, 2006
• "Implementing Domain-Driven Design", Vaughn Vernon, 2013
• "Domain-Driven Design Reference: Definitions and Pattern Summaries", Eric Evans, 2014

DDD C# implementations

• ".NET Domain-Driven Design with C#: Problem - Design - Solution", Tim McCarthy, 2008

Coding practices

• "Patterns of Enterprise Application Architecture", Martin Fowler, 2002

Other Github organisations

• https://github.com/dddinphp
• https://github.com/orgs/ddd-php
• https://github.com/phpmentors-jp

On Discussion Groups

• DDDinPHP on Google Group

On twitter

• https://twitter.com/DDDBE
• https://twitter.com/dddbook

On IRC

• #DDDinPHP on Freenode