node_modules/amqplib/examples/tutorials/callback_api/new_task.js

#!/usr/bin/env node

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);

  var q = 'task_queue';
  
  conn.createChannel(function(err, ch) {
    if (err !== null) return bail(err, conn);
    ch.assertQueue(q, {durable: true}, function(err, _ok) {
      if (err !== null) return bail(err, conn);
      var msg = process.argv.slice(2).join(' ') || "Hello World!";
      ch.sendToQueue(q, Buffer.from(msg), {persistent: true});
      console.log(" [x] Sent '%s'", msg);
      ch.close(function() { conn.close(); });
    });
  });
}

amqp.connect(on_connect);