NodeJS AMQP Exchanges

.gitmodules

[submodule "amqp"]
	path = amqp
	url = http://github.com/ry/node-amqp.git

node-amqp-direct-exchange.js

#!/usr/bin/env node

// Simply publish a message to a direct exchange.
sys  = require('sys');
amqp = require('./amqp');

inspect = sys.inspect;
puts = sys.puts;

connection = amqp.createConnection();

connection.addListener('error', function (e) {
  throw e;
})

connection.addListener('close', function (e) {
  puts('connection closed.');
});


connection.addListener('ready', function () {
  puts("connected to " + connection.serverProperties.product);

  var exchange = connection.exchange('node-direct-exchange', {type: 'direct'});

  // Consumer:
  var queue = connection.queue('node-direct-queue');
  queue.bind(exchange, "direct-key");
  queue.subscribe(function (message) {
    // raw message is a Buffer:
    puts("Got a message: \n" + inspect(message));
    // Message Properties:
    puts("--- Message (" + message._deliveryTag + ", '" + message._routingKey + "') ---");
    puts("--- contentType: " + message.contentType);
    // Get original message string:
    puts('--- toString(): ' + message.data.toString('ascii', 0, message.data.length));
  })
  .addCallback(function () {
    // Publisher:
    // [without a queue, can use with: exchange.addListener('open', function () {/*...*/});]
    puts("publishing message");
    exchange.publish("direct-key", "¡España!", {contentType: 'text/plain'});

    setTimeout(function () {
      // wait one second to receive the message, then quit
      connection.end();
    }, 1000);
  });

});

node-amqp-fanout-exchange.js

#!/usr/bin/env node

// Fanout exchange with two consumers.
sys  = require('sys');
amqp = require('./amqp');

inspect = sys.inspect;
puts = sys.puts;

connection = amqp.createConnection();

connection.addListener('error', function (e) {
  throw e;
})

connection.addListener('close', function (e) {
  puts('connection closed.');
});


connection.addListener('ready', function () {
  puts("connected to " + connection.serverProperties.product);

  var exchange = connection.exchange('node-fanout-exchange', {type: 'fanout'});

  // Consumer 1:
  var _1st_queue = connection.queue('node-fanout-queue-one');
  _1st_queue.bind(exchange, "key-one");
  _1st_queue.subscribe(function (message) {
    puts("Got a message (Consumer 1): ");
    // Message Properties:
    puts("--- Message (" + message._deliveryTag + ", '" + message._routingKey + "') ---");
    puts("--- contentType: " + message.contentType);
    // Get original message string:
    puts('--- toString(): ' + message.data.toString('ascii', 0, message.data.length));
  });
  // Consumer 2:
  var _2nd_queue = connection.queue('node-fanout-queue-two');
  _2nd_queue.bind(exchange, "key-two");
  _2nd_queue.subscribe(function (message) {
    puts("Got a message (Consumer 2):");
    // Message Properties:
    puts("--- Message (" + message._deliveryTag + ", '" + message._routingKey + "') ---");
    puts("--- contentType: " + message.contentType);
    // Get original message string:
    puts('--- toString(): ' + message.data.toString('ascii', 0, message.data.length));
  })
  .addCallback(function () {
    // Publisher:
    puts("publishing message");
    exchange.publish("whatever-key", "¡España!", {contentType: 'text/plain'});

    setTimeout(function () {
      // wait one second to receive the message, then quit
      connection.end();
    }, 1000);
  });

});

node-amqp-topic-exchange.js

#!/usr/bin/env node

// Topic exchange (default) with three consumers:
sys  = require('sys');
amqp = require('./amqp');

inspect = sys.inspect;
puts = sys.puts;

connection = amqp.createConnection();

connection.addListener('error', function (e) {
  throw e;
})

connection.addListener('close', function (e) {
  puts('connection closed.');
});


connection.addListener('ready', function () {
  puts("connected to " + connection.serverProperties.product);
  // There is no need to declare type, 'topic' is the default:
  var exchange = connection.exchange('node-topic-exchange');

  // Consumer:
  var _1st_queue = connection.queue('node-topic-queue-one');
  _1st_queue.bind(exchange, "topic_a.*");
  _1st_queue.subscribe(function (message) {
    // raw message is a Buffer:
    puts("Got a message (Consumer 1 - \"topic_a.*\"):");
    // Message Properties:
    puts("--- Message (" + message._deliveryTag + ", '" + message._routingKey + "') ---");
    puts("--- contentType: " + message.contentType);
    // Get original message string:
    puts('--- toString(): ' + message.data.toString('ascii', 0, message.data.length));
  });
  var _2nd_queue = connection.queue('node-topic-queue-two');
  _2nd_queue.bind(exchange, "*.subtopic_b");
  _2nd_queue.subscribe(function (message) {
    // raw message is a Buffer:
    puts("Got a message (Consumer 2 - \"*.subtopic_b\"):");
    // Message Properties:
    puts("--- Message (" + message._deliveryTag + ", '" + message._routingKey + "') ---");
    puts("--- contentType: " + message.contentType);
    // Get original message string:
    puts('--- toString(): ' + message.data.toString('ascii', 0, message.data.length));
  });
  var _3rd_queue = connection.queue('node-topic-queue-three');
  _3rd_queue.bind(exchange, "#");
  _3rd_queue.subscribe(function (message) {
    // raw message is a Buffer:
    puts("Got a message (Consumer 3 - \"#\"):");
    // Message Properties:
    puts("--- Message (" + message._deliveryTag + ", '" + message._routingKey + "') ---");
    puts("--- contentType: " + message.contentType);
    // Get original message string:
    puts('--- toString(): ' + message.data.toString('ascii', 0, message.data.length));
  })
  .addCallback(function () {
    // Publisher:
    puts("publishing messages");
    exchange.publish("topic_a.subtopic_a", "Message One", {contentType: 'text/plain'});
    exchange.publish("topic_a.subtopic_b", "Message Two", {contentType: 'text/plain'});
    exchange.publish("topic_b.subtopic_b", "Message Three", {contentType: 'text/plain'});

    setTimeout(function () {
      // wait one second to receive the message, then quit
      connection.end();
    }, 1000);
  });

});