DDD symfony sample application

By Jose Celano

A symfony sample application using DDD.

The purpose: testing some DDD concepts using Symfony.

Domain

• User can register

Installation

Symfony standard installation.

What I want to test?

Command and Event Bus by Matthias Noback

• Store events (DDD-CQRS)
• Handle events asynchronously (for better performance)
• Log events (for debugging)
• Use message queue (ActiveMQ and RabbitMQ) to send messages between different application modules

Security layer Michiel Uithol

• Authorization, where: command, app service?

Repositories

• Agnostic base repository (implementations with Doctrine, MongoDB, ...)
• Is possible to use doctrine with annotations and keep domain decoupled? I have seen some people store view instead of domain entity.

Validation

• Where to put validation: command, domain service, repository?

Usage

On order to test Matthias Noback message bus sample using asynchronous events bus must run this Symfony command to pull events from the message queue:

´´´´ php app/console matthias:user:asyn-event-subscriber ´´´´

Stomp message queue parameter are defined in ´´´´parameters.yml´´´´

´´´´ # stomp message queue stomp_host: 127.0.0.1 stomp_port: 61613 stomp_default_queue: /queue/foo stomp_user: admin stomp_password: adminPassword ´´´´

References

Other DDD Symfony sample applications

• https://github.com/tyx/ddd-sample-symfony
• https://github.com/leopro/trip-planner
• https://github.com/tyx/cqrs-php-sandbox
• https://github.com/SimpleBus

The best blogs I have found about DDD+Symfony

• http://nobacksoffice.nl
• http://verraes.net
• http://williamdurand.fr

Posts that has inspired me.

• http://www.whitewashing.de/2013/09/04/decoupling_from_symfony_security_and_fosuserbundle.html

• http://www.whitewashing.de/2012/08/22/building_an_object_model__no_setters_allowed.html

• http://verraes.net/2014/11/domain-events

• http://verraes.net/2013/04/decoupling-symfony2-forms-from-entities

• http://williamdurand.fr/2013/12/16/enforcing-data-encapsulation-with-symfony-forms

• http://php-and-symfony.matthiasnoback.nl/2015/01/a-wave-of-command-buses

• http://php-and-symfony.matthiasnoback.nl/2015/01/responsibilities-of-the-command-bus

• http://php-and-symfony.matthiasnoback.nl/2015/01/from-commands-to-events

• http://php-and-symfony.matthiasnoback.nl/2015/01/collecting-events-and-the-events-aware-command-bus