node: third tutorial

Author: majek

javascript-nodejs/README.md

@@ -20,3 +20,7 @@ pull the dependency from `npm` run:
     node send.js
     node receive.js
 
+[Tutorial three: Publish/Subscribe](http://www.rabbitmq.com/tutorial-three-python.html):
+
+    node receive_logs.js
+    node emit_log.js "info: This is the log message"

javascript-nodejs/emit_log.js

@@ -0,0 +1,16 @@
+var amqp       = require('amqp');
+var amqp_hacks = require('./amqp-hacks');
+
+var connection = amqp.createConnection({host: 'localhost'});
+
+var message = process.argv.slice(2).join(' ') || 'Hello World!';
+
+connection.on('ready', function(){
+    connection.exchange('logs', {type: 'fanout',
+                                 autoDelete: false}, function(exchange){
+        exchange.publish('', message);
+        console.log(" [x] Sent %s", message);
+
+        amqp_hacks.safeEndConnection(connection);
+    });
+});

javascript-nodejs/receive_logs.js

@@ -0,0 +1,18 @@
+var amqp = require('amqp');
+
+var connection = amqp.createConnection({host: 'localhost'});
+
+connection.on('ready', function(){
+    connection.exchange('logs', {type: 'fanout',
+                                 autoDelete: false}, function(exchange){
+        connection.queue('tmp-' + Math.random(), {exclusive: true},
+                         function(queue){
+            queue.bind('logs', '');
+            console.log(' [*] Waiting for logs. To exit press CTRL+C')
+
+            queue.subscribe(function(msg){
+                console.log(" [x] %s", msg.data.toString('utf-8'));
+            });
+        })
+    });
+});