node-raft-redis/lib/cjs/test.js

Consensus for node microservices, based on a simplified version of the [raft algorithm](https://raft.github.io/). Requires redis as a medium. Features automatic discovery of the services of same kind. Selects one instance of a microservice as leader. For

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const index_1 = require("./index");
const candidate = new index_1.Candidate({
    redis: {
        host: "localhost",
        port: 6379,
        // or url: 'redis://alice:foobared@awesome.redis.server:6380'
    },
    kind: "my-service",
    meta: {
        someKey: Math.random(),
    },
});
candidate.on("elected", async () => {
    console.log("elected");
    // You can be sure only this instance is the leader (at this moment).
    candidate.messageFollowers("Hello from leader");
    // The leader can start a re-election with reelect()
    // It is possible for this instance to be elected again.
    //candidate.reelect();
});
candidate.on("message", async ({ message, from }) => {
    const currentLeader = await candidate.getLeader();
    const isFromLeader = from === currentLeader?.id;
    if (isFromLeader) {
        candidate.messageTo(from, "Echo from follower");
    }
});
candidate.on("message:from:follower", ({ message, from }) => {
    // Will be logged only in the leader instance.
    // console.log(message, from);
});
candidate.on("error", (err) => {
    console.error(err);
});
candidate.start();