Erlang Ecosystem for Elixir devs

List of content

• Design patterns in Elixir
• Observability

Erlang & Elixir

Erlang & Elixir GOTO Conf - Graphic Recording¹

Design Patterns in Elixir

Design patterns in Elixir - Graphic Recording²

Elixir

• Elixir anti-patterns to guide the community
  • Code-related
  • Design-related
  • Processes-related
  • Meta-programming
• A pattern describes a problem.
• Book: Design paterns elements of reusable object-oriented software.
• Objects are about: behaviour, mutability and state.
• Design Patterns in OO are solved by functional programming: mediator, facade, startegy, interpreter, adapter, decorator, proxy, observer.

Observability

Observability at scale - Graphic Recording³

Erlang Elixir

Observability is the measure of how well a system's internal states can be inferred from its external outputs. It's also the ability to address failures before they happen. Observability needs to be designed.

• Observability needs to be designed.
• It's about past, present and future: logs, metrics and alarms.
• Design is the key.
• Logging
  • Detect failures and errors
  • What happened in your project?
  • Design your logs.
  • Avoid mess.
  • Record complimentary information about the errors.
• Metrics
  • Performance indicators in live systems.
  • Metrics are not free.
  • Types: business, product, and system.
  • Management and development should collaborate together.
  • Design your metrics.
  • Avoid vendor lock-in.
  • Understand your system.
  • Keep your metrics tidy.
• Alarms
  • Come from logs or metrics.

Notes and references

Footnotes

1. Erlang & Elixir, GOTO Conf 2023, Francesco Cesarini & Andrea Leopardi. Drawings by @carlogilmar @visual_partner. ↩

2. Design Patterns in Elixir, ElixirConf EU 2024, Jose Valim. Drawings by @carlogilmar @visual_partner. ↩

3. Observability at scale, Code BEAM Europe Berlín 2023, Natalia Chechina. Drawings by @carlogilmar @visual_partner. ↩