November 30, 2021

75: RabbitMQ and Commanded at Simplebet with Dave Lucia

55 minutes

We talk with Dave Lucia about Simplebet’s use of RabbitMQ and Commanded for solving unique real-time problems. We learn how Simplebet uses Elixir when creating real-time sports betting markets. We also learn what CQRS systems are, how the Commanded library supports that in Elixir, and how Commanded pairs well with RabbitMQ. Dave talks about moving away from Kafka to RabbitMQ and how that made sense for their use cases. Also valuable, Dave shares where they have found the “dragons” in their design. A helpful discussion that helps identify when CQRS systems might be a tool to use when solving our own problems. Also, Simplebet is betting on SurfaceUI for front-end design in a big and interesting way as well!

Show Notes online - http://podcast.thinkingelixir.com/75

Elixir Community News

https://fly.io/phoenix-files/ – Phoenix focused section of Fly.io blog

https://fly.io/phoenix-files/safe-ecto-migrations/ – Safe Ecto Migrations multi-part guide

https://github.com/erlang/otp/pull/5292 – Erlang 25 is documenting all the built-in types

https://twitter.com/theerlef/status/1460683487317577734 – Erlang Ecosystem Foundation shared that they reached the milestone of 1000 members!

https://www.youtube.com/watch?v=y8-9yZlye30 – Quinn Wilton's "100 years of Erlang" Code Beam America presentation

https://slides.com/rc-6/100-years-of-erlang-slimmed – Quinn's slides

https://github.com/spawnfest/eep49ers/ – SpawnFest Overall Winner

https://github.com/spawnfest/eArangoDB – SpawnFest Maintainability Winner

https://github.com/spawnfest/beamoji – SpawnFest Innovation Winner

https://www.twitch.tv/josevalim – Advent of Code problems will be solved by Jose Valim on Twitch

https://github.com/rrrene/credo/blob/master/CHANGELOG.md – Credo 1.6 release includes mix credo --first-run feature

https://github.com/livebook-dev/kino/pull/50 – Jonathan's Kino PR that adds "controls" and is demonstrated by playing multi-player Pong in a Livebook notebook!

https://github.com/pprzetacznik/IElixir – Jupyter's kernel for Elixir

https://github.com/elixir-lang/ex_doc/blob/main/CHANGELOG.md – ExDoc v0.26.0 is out with new usability features

https://twitter.com/josevalim/status/1462436734285795340 – José Valim highlights several new ExDoc features

https://vimeo.com/647867227 – Oban Web v2.8.0 is out along with Oban Pro v0.9.3 and a video demonstrates the changes

Do you have some Elixir news to share? Tell us at @ThinkingElixir or email at [email protected]

Discussion Resources

https://www.youtube.com/watch?v=dmBdFh5N1g4 – Migrating from Kafka to RabbitMQ at SimpleBet: Why and How | David Lucia | RabbitMQ Summit 21

https://medium.com/@davelucia/two-years-of-elixir-at-the-outline-ad671a56c9ce

https://medium.com/@davelucia/beyond-functions-in-elixir-refactoring-for-maintainability-5c73daba77f3

https://medium.com/@davelucia/battleship-elixir-json-sunk-my-float-dc3df46447db

https://soundcloud.com/elixirtalk/episode-153-feat-dave-lucia-the-dream-stack-with-rust-elixir

https://www.youtube.com/watch?v=xmUfTl33-fU – Rustling up predictive sporting betting models on the BEAM - DAVID LUCIA

https://www.youtube.com/watch?v=wvfhrvAFOoQ – David Lucia - Refactoring Elixir for maintainability | Code BEAM SF 19

https://www.youtube.com/watch?v=Lh5rA1pgWCk – ElixirConf 2021 - Dave Lucia - Surface - a bridge to the Javascript community

https://github.com/davydog187/migrating_from_kafka

https://speakerdeck.com/davydog187/betting-on-observability-at-simplebet

https://lightstep.com/case-studies/simplebet/

https://theoutline.com/

https://www.bloomberg.com/

https://www.theverge.com/

https://www.bdg.com/

https://www.draftkings.com/

https://www.amqp.org/

https://www.rabbitmq.com/

https://github.com/commanded/commanded

https://opencollective.com/commanded

https://microservices.io/patterns/data/cqrs.html

https://en.wikipedia.org/wiki/Conflict-free_replicated_data_type

https://www.confluent.io/blog/avro-kafka-data/

https://kafka.apache.org/

https://www.linkedin.com/in/joseph-lozano/

https://en.wikipedia.org/wiki/Synthetic_monitoring

https://github.com/surface-ui/surface

Guest Information

https://twitter.com/davydog187 – Dave Lucia on Twitter

https://twitter.com/sb_engineers – Simplebet Engineering on Twitter

https://twitter.com/simplebethq – Simplebet on Twitter

https://github.com/davydog187/ – on Github

https://davelucia.com – Blog

Find us online

Message the show - @ThinkingElixir

Email the show - [email protected]

Mark Ericksen - @brainlid

David Bernheisel - @bernheisel

Cade Ward - @cadebward