Simple Mosca MQTT server demo, with leveldb persistence

index.mjs

import mosca from 'mosca';

// source: https://github.com/mcollina/mosca/wiki/Mosca-basic-usage

const moscaSettings = {
  port: 1883,
  persistence: {
    factory: mosca.persistence.LevelUp,
    path: 'db',
  },
};

const server = new mosca.Server(moscaSettings);

const setup = () => {
  console.log('Mosca server is up and running');

  const message = {
    topic: '/hello/world',
    payload: 'abdce', // or a Buffer
    qos: 0, // 0, 1, or 2
    retain: true, // retain message for future subscribers
  };

  server.publish(message, () => {
    console.log('message published!');
  });
};

server.on('ready', setup);

// fired when a message is published
server.on('published', packet => {
  console.log('published event', packet.retain ? '(persisted)' : '', packet.topic, packet.payload);
});

export default server;

package.json

{
  "name": "mosca-playground",
  "version": "0.0.0",
  "dependencies": {
    "mosca": "^2.7.0"
  }
}