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Show HN: Building a CQRS/ES web application in Elixir using Phoenix

3 points by slashdotdash ↗ HN
A case study describing how I built a web app following the Command Query Responsibility Segregation and event sourcing (CQRS/ES) pattern. In Elixir using the Phoenix Framework.

https://10consulting.com/2017/01/04/building-a-cqrs-web-application-in-elixir-using-phoenix/

It uses two open-source Elixir libraries I've authored to provide the building blocks for such applications:

* EventStore: A CQRS event store that uses PostgreSQL (v9.5 or later) as the underlying storage engine. [1]

* Commanded: Provides support for command registration and dispatch; hosting and delegation to aggregate roots; event handling; and long running process managers. [2]

It's an unorthodox approach to building Phoenix web apps. The article details why you might consider applying it.

[1] https://github.com/slashdotdash/eventstore

[2] https://github.com/slashdotdash/commanded

3 comments

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stuffchunk
Thanks for this. Very in-depth. I just started toying around with ES in Elixir and this definitely helps.

Can the source for the application be found anywhere?

slashdotdash
Sorry, the case study web application is closed source.

I plan to build an open-source reference application. I'll write-up the process, with links to commits, as I go. There's a mailing list on my site, or subscribe to the RSS feed, to stay informed.