How to Implement an Actor Model in Go

Implement the Actor Model in Go by creating a struct with a channel for message passing and a goroutine that processes messages in a loop.

package main

import (
	"fmt"
	"time"
)

type Actor struct {
	id    int
	inbox chan string
}

func NewActor(id int) *Actor {
	a := &Actor{id: id, inbox: make(chan string, 1)}
	go a.run()
	return a
}

func (a *Actor) run() {
	for msg := range a.inbox {
		fmt.Printf("Actor %d received: %s\n", a.id, msg)
	}
}

func (a *Actor) Send(msg string) {
	a.inbox <- msg
}

func main() {
	actor := NewActor(1)
	actor.Send("Hello Actor")
	time.Sleep(100 * time.Millisecond)
}

The Actor Model is a way to build programs where independent units, called actors, work in parallel by sending messages to each other instead of sharing memory. Think of it like a team of workers where each person has their own mailbox; they only communicate by dropping notes in those boxes, which prevents them from stepping on each other's toes. You use this pattern in Go to safely handle many tasks at once without complex locking mechanisms.