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We experience the real world by reacting to events that have occurred, what if we modelled our Elixir applications in the same way? Event sourcing is an approach where application state changes are modelled as an immutable series of application-specific domain events over time. Changes made by end users of such applications are recorded as new events. Unlike in a traditional CRUD application, where updates and deletes are destructive operations, events are never deleted. OBJECTIVES Introduce the concept of event sourcing with a practical application in Elixir. Talk covers the how, why, and why not to apply an event-driven approach to building your Elixir applications and services. AUDIENCE Anyone interested in discovering how the simple concept of using domain events to capture state changes can bring tangible benefits to application development.

#Code BEAM STO 2019

Innovative unorthodox design patterns used in RabbitMQ /// Ayanda Dube

#Code BEAM STO 2019

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How to teach Elixir to non-functional developers /// Leandro Bighetti

Stateful property-based testing: with a game logic case study /// Lou Xun

Erlang scales robots /// Natalia Chechina

Inch: How Elixir 1.7 changed the rules for documentation analysis /// René Föhring

Functional APIs with GraphQL & Elixir /// Hubert Łępicki

Digging through the garbage /// Devon Estes

Structs for order /// Andrey Chernykh

Your monolith, Elixir and you /// Tobias Pfeiffer

Ra: a Raft implementation /// Karl Nilsson

An event-driven approach to building Elixir applications

Building the tomorrow classroom with Elixir /// Anayeli Malvaez and Pedro Hernandez

Innovative unorthodox design patterns used in RabbitMQ /// Ayanda Dube