Example of subscriber to infrastructure services

sub.js

var cloudfront = require('./cloudfront.io');
var infrastructure = new cloudfront.infrastructure();

infrastructure.discover('memcache')
              .enter(function(instance, done) {
                 // do something when a new memcache instance joins
                 done(); // callback required for ATOMIC acknowledgement (same concept as QUnit)
              })
              .exit(function(instance, done) {
                 // do something when an instance has leaves
                 done(); // callback required for ATOMIC acknowledgement (same concept as QUnit)
              });