Erlang · Medium

Lesson 1 · On the house

Links and exit signals

link, spawn_link, trap_exit, and how crashes propagate between processes.

Lesson 2

Monitors

One-way monitoring with erlang:monitor, DOWN messages, and demonitor.

Lesson 3

gen_server basics

The OTP generic server: start_link, call, cast, and the init/handle_call/handle_cast callbacks.

Lesson 4

gen_server state, info, and termination

handle_info for raw messages, timeouts, stop, terminate, and state as a map.

Lesson 5

Supervisors

Restart strategies, child specs, intensity limits, and the let-it-crash design.

Lesson 6

ETS tables

In-memory tables shared across processes: set, ordered_set, bag, lookups, and counters.

Lesson 7

Process registry and naming

register, whereis, via registries, and avoiding atom leaks.

Lesson 8

Type specs and Dialyzer

-spec, -type, -opaque, and static discrepancy analysis with Dialyzer.

Lesson 9

Logging

OTP logger levels, metadata, structured reports, and configuring handlers.

Lesson 10

Project layout with rebar3

Applications, the .app.src file, rebar.config, dependencies, releases, and common commands.