0PricingLogin
Erlang OTP: Distributed & Fault-Tolerant Systems Programming · Lesson

GenStatem for State Management

Master GenStatem to build robust finite state machines, managing complex state transitions and handling events effectively.

Meet GenStatem

Welcome to GenStatem! It's an OTP behavior in Erlang used to build Finite State Machines (FSMs). If your system component needs to behave differently based on its current state, GenStatem is your friend.

Think of it as a specialized tool for managing complex state logic, offering more explicit control over state transitions than a regular GenServer.

FSM Fundamentals

A Finite State Machine (FSM) is a mathematical model of computation that describes the behavior of a system. It can only be in one state at any given time.

  • States: Distinct conditions a system can be in (e.g., "on", "off", "idle", "active").
  • Events: Inputs or occurrences that trigger a change in state (e.g., "button_press", "timeout").
  • Transitions: Rules that define how an event in a particular state causes a shift to a new state.

All lessons in this course

  1. GenStatem for State Management
  2. GenEvent for Event Handling
  3. Custom OTP Behaviors
  4. Hot Code Swapping & Live Upgrades
← Back to Erlang OTP: Distributed & Fault-Tolerant Systems Programming