Add a third level construct under Profile and Client, Instance. This allows more than one connected object with the same client credentials.

static/cosmopolite.js

@@ -45,6 +45,8 @@ var Cosmopolite = function(callbacks, urlPrefix, namespace) {
   this.subscriptions_ = {};
   this.profilePromises_ = [];
 
+  this.instanceId_ = this.uuid_();
+
   this.messageQueueKey_ = this.namespace_ + ':message_queue';
   if (this.messageQueueKey_ in localStorage) {
     var messages = JSON.parse(localStorage[this.messageQueueKey_]);
@@ -447,6 +449,7 @@ Cosmopolite.prototype.sendRPCs_ = function(commands, delay) {
     return;
   }
   var request = {
+    'instance_id': this.instanceId_,
     'commands': [],
   };
   commands.forEach(function(command) {

static/test.js

@@ -441,6 +441,32 @@ asyncTest('sendMessage ACL', function() {
   });
 });
 
+asyncTest('Two channels, one client', function() {
+  expect(2);
+
+  var namespace = randstring();
+  var subject = randstring();
+  var message = randstring();
+
+  var callbacks = {
+    'onMessage': function(msg) {
+      console.log('onMessage');
+      equal(msg['subject']['name'], subject, 'subject matches');
+      equal(msg['message'], message, 'message matches');
+      cosmo1.shutdown();
+      start();
+    },
+  };
+
+  var cosmo1 = new Cosmopolite(callbacks, null, namespace);
+  cosmo1.subscribe(subject).then(function() {
+    var cosmo2 = new Cosmopolite({}, null, namespace);
+    cosmo2.sendMessage(subject, message).then(function() {
+      cosmo2.shutdown();
+    });
+  });
+});
+
 
 module('dev_appserver only');