✨ Make your actors shine 🎭
fresnel is a library to help in working with the OTP framework and actors in gleam. The current supported features include:
- Round Robin load balancer actor for distributing messages across multiple actor targets
- Fan Out Pub/Sub actor for distributing messages across all subscribed actors
gleam add fresnelimport fresnel/fan_out
import gleam/otp/actor
import gleam/erlang/process
import gleam/io
type Event {
Lights
Camera
Action
}
fn subscriber(event: Event, id: String) -> actor.Next(Event, String) {
case event {
Lights -> {
io.println(id<>": lights")
actor.continue(id)
}
Camera -> {
io.println(id<>": camera")
actor.continue(id)
}
Action -> {
io.println(id<>": action!")
actor.continue(id)
}
}
}
pub fn main() {
let assert Ok(publisher) = actor.start([], fan_out.handler)
let assert Ok(listener1) = actor.start("1", subscriber)
let assert Ok(listener2) = actor.start("2", subscriber)
process.send(publisher, Lights)
process.send(publisher, Camera)
process.send(publisher, Action)
}outputs:
1: lights
2: lights
1: camera
2: camera
1: action!
2: action!
Further documentation can be found at https://hexdocs.pm/fresnel.
gleam run # Run the project
gleam test # Run the tests
gleam shell # Run an Erlang shell