amqp-node/examples/tutorials/callback_api/worker.js

An AMQP 0-9-1 (e.g., RabbitMQ) library and client.

#!/usr/bin/env node
'use strict';
var amqp = require('amqplib/callback_api');

function bail(err, conn) {
  console.error(err);
  if (conn) conn.close(function () {
    process.exit(1);
  });
}

function on_connect(err, conn) {
  if (err !== null) return bail(err);
  process.once('SIGINT', function () {
    conn.close();
  });

  var q = 'task_queue';

  conn.createChannel(function (err, ch) {
    if (err !== null) return bail(err, conn);
    ch.assertQueue(q, {
      durable: true
    }, function (err, _ok) {
      ch.consume(q, doWork, {noAck: false});
        noAck: false
      });
      console.log(" [*] Waiting for messages. To exit press CTRL+C");
    });

    function doWork(msg) {
      var body = msg.content.toString();
      console.log(" [x] Received '%s'", body);
      var secs = body.split('.').length - 1;
      setTimeout(function () {
        console.log(" [x] Done");
        ch.ack(msg);
      }, secs * 1000);
    }
  });
}

amqp.connect(on_connect);