AMQP 0-9-1 library and client for Node.JS

npm install amqplib

• Change log
• GitHub pages
• API reference
• Examples from RabbitMQ tutorials

A library for making AMQP 0-9-1 clients for Node.JS, and an AMQP 0-9-1 client for Node.JS v0.8-0.12, v4-v9, and the intervening io.js releases.

This library does not implement AMQP 1.0 or AMQP 0-10.

Project status:

• Expected to work
• Complete high-level and low-level APIs (i.e., all bits of the protocol)
• Stable APIs
• A fair few tests
• Measured test coverage
• Ports of the RabbitMQ tutorials as examples
• Used in production

Still working on:

• Getting to 100% (or very close to 100%) test coverage

Callback API example

var q = 'tasks';
 
function bail(err) {
  console.error(err);
  process.exit(1);
}
 
// Publisher
function publisher(conn) {
  conn.createChannel(on_open);
  function on_open(err, ch) {
    if (err != null) bail(err);
    ch.assertQueue(q);
    ch.sendToQueue(q, new Buffer('something to do'));
  }
}
 
// Consumer
function consumer(conn) {
  var ok = conn.createChannel(on_open);
  function on_open(err, ch) {
    if (err != null) bail(err);
    ch.assertQueue(q);
    ch.consume(q, function(msg) {
      if (msg !== null) {
        console.log(msg.content.toString());
        ch.ack(msg);
      }
    });
  }
}
 
require('amqplib/callback_api')
  .connect('amqp://localhost', function(err, conn) {
    if (err != null) bail(err);
    consumer(conn);
    publisher(conn);
  });

Promise API example

var q = 'tasks';
 
var open = require('amqplib').connect('amqp://localhost');
 
// Publisher
open.then(function(conn) {
  return conn.createChannel();
}).then(function(ch) {
  return ch.assertQueue(q).then(function(ok) {
    return ch.sendToQueue(q, new Buffer('something to do'));
  });
}).catch(console.warn);
 
// Consumer
open.then(function(conn) {
  return conn.createChannel();
}).then(function(ch) {
  return ch.assertQueue(q).then(function(ok) {
    return ch.consume(q, function(msg) {
      if (msg !== null) {
        console.log(msg.content.toString());
        ch.ack(msg);
      }
    });
  });
}).catch(console.warn);

Running tests

npm test

To run the tests RabbitMQ is required. Either install it with your package manager, or use docker to run a RabbitMQ instance.

docker run -d --name amqp.test -p 5672:5672 rabbitmq

If prefer not to run RabbitMQ locally it is also possible to use a instance of RabbitMQ hosted elsewhere. Use the URL environment variable to configure a different amqp host to connect to. You may also need to do this if docker is not on localhost; e.g., if it's running in docker-machine.

One public host is dev.rabbitmq.com:

URL=amqp://dev.rabbitmq.com npm test

NB You may experience test failures due to timeouts if using the dev.rabbitmq.com instance.

You can run it under different versions of Node.JS using nave:

nave use 0.8 npm test

or run the tests on all supported versions of Node.JS in one go:

make test-all-nodejs

(which also needs nave installed, of course).

Lastly, setting the environment variable LOG_ERRORS will cause the tests to output error messages encountered, to the console; this is really only useful for checking the kind and formatting of the errors.

LOG_ERRORS=true npm test

Test coverage

make coverage
open file://`pwd`/coverage/lcov-report/index.html