Elixir OTP Skill

Essential OTP Patterns (KISS First)

Use these patterns for 80% of use cases. Start simple, optimize later.

GenServer: Stateful Processes

When to use GenServer:

• Need to maintain state across function calls
• State needs to be shared across processes
• Need to serialize access to a resource
• Long-running processes with periodic tasks

Basic GenServer Pattern:

defmodule MyApp.Counter do
  use GenServer