Advanced OTP Patterns

Coming Soon

This lesson will teach you advanced OTP behaviors and patterns for building sophisticated, production-ready systems. You’ll learn how to:

• Use gen_fsm for complex state machine implementations
• Implement event handling with gen_event
• Create custom OTP behaviors for domain-specific needs
• Build advanced supervision strategies
• Design complex application architectures with multiple OTP components

What You’ll Build

By the end of this lesson, you’ll have implemented:

• Complex state machines using gen_fsm
• Event-driven architecture with gen_event
• Custom OTP behaviors for specific use cases
• Advanced supervision trees with dynamic children
• Integration patterns for complex distributed systems

Key Concepts Preview

% gen_fsm for user session state
-behaviour(gen_fsm).

% States: disconnected, authenticating, connected, idle
connected({message, Text}, _From, State) ->
    broadcast_message(Text),
    {reply, ok, connected, State, ?IDLE_TIMEOUT};

connected(timeout, State) ->
    {next_state, idle, State}.

% gen_event for chat events
-behaviour(gen_event).

handle_event({user_joined, User, Room}, State) ->
    notify_room_members(Room, {user_joined, User}),
    {ok, State}.

% Custom behavior
-callback handle_chat_event(Event, State) -> {ok, State} | {stop, Reason}.

This lesson builds on the DevOps practices from Lesson 32 and prepares you for the integration patterns we’ll explore in Lesson 34.

This lesson is currently under development. Check back soon for the complete content!