speaker.md

Lucas Dohmen

Contact details

• Twitter: @moonbeamlabs
• Company: triAGENS GmbH http://en.triagens.com/

Speaker bio

I’m a member of the core team of the NoSQL database project ArangoDB where I work on the graph functionality, tools for the Ruby community to use the database and Foxx. Furthermore I contribute to various open source projects like hacken.in (an event calender for nerds in my hometown written in Rails) and projects related to ArangoDB. You can find me listening or speaking at our local usergroups for Ruby, JavaScript, NoSQL and (as a coach for) Rails Girls and Coder Dojo.

talk.md

Domain Driven Design & NoSQL

• Desired talk duration: 30 minutes

Abstract

Domain Driven Design is a software development process that focuses on the finding a common language for the involved parties. This language and the resulting models are taken from the domain rather than the technical details of the implementation. The goal is to improve the communication between customers, developers and all other involved groups. Even if Eric Evan's book about this topic was written almost ten years ago, this topic remains important because a lot of projects fail for communication reasons.

Relational databases have their own language and influence the design of software into a direction further away from the Domain: Entities have to be created for the sole purpose of adhering to best practices of relational database. Two kinds of NoSQL databases are changing that: Document stores and graph databases. In a document store you can model a contains relation in a more natural way and thereby express if this entity can exist outside of its surrounding entity. A graph database allows you to model relationships between entities in a straight forward way that can be expressed in the language of the domain.

I want to look at the way a multi model database that combines a document store and a graph database can help you model your problems in a way that is understandable for all parties involved.