JavaScript
ReasonMLActor Communication
An actor alone is a somewhat useless construct; actors need to work together. Actors can send messages to one another by using the dispatch method.
References to other actors can be included in a given message, allowing actors to randomly address one another.
In this example, the actors Ping and Pong are playing a perfect ping-pong match. To start the match, we dispatch a message to Ping with Pong set as the sender in the message
const delay = (time) => new Promise((res) => setTimeout(res, time));
const ping = spawnStateless(system, async (msg, ctx) => {
console.log(msg.value);
// ping: Pong is a little slow. So I'm giving myself a little handicap :P
await delay(500);
dispatch(msg.sender, { value: ctx.name, sender: ctx.self });
}, 'ping');
const pong = spawnStateless(system, (msg, ctx) => {
console.log(msg.value);
dispatch(msg.sender, { value: ctx.name, sender: ctx.self });
}, 'pong');
dispatch(ping, { value: 'begin' sender:pong });
This produces the following console output:
begin
ping
pong
ping
pong
ping
etc...