Multiple Websocket Handler in Tornado

ws

class UpdateHandler(tornado.websocket.WebSocketHandler,BaseHandler):
    #cache = []
    brain = {}
    cache_size = 200
    listenners = {}

    def allow_draft76(self):
        # for iOS 5.0 Safari
        return True

    @tornado.web.asynchronous
    def open(self,url):
        self.url = url
        if not url == "me":
        	try:
        		UpdateHandler.listenners[url].append(self)
        	except KeyError, e:
        		UpdateHandler.listenners[url] = []
        		UpdateHandler.listenners[url].append(self)
        else:
        	for tag in self.current_user["tags"]:
        		try:
        			UpdateHandler.listenners[tag].append(self)
        		except KeyError, e:
        			UpdateHandler.listenners[tag] = []
        			UpdateHandler.listenners[tag].append(self)

    @tornado.web.asynchronous
    def on_close(self):
        if not self.url == "me":
        	UpdateHandler.listenners[self.url].remove(self)
        else:
        	for tag in self.current_user["tags"]:
        		UpdateHandler.listenners[tag].remove(self)

    @tornado.web.asynchronous
    def update_cache(self, feed):
        #self.cache.insert(0,feed)
        for tag in feed["parsed_tags"]:
        	try:
        		UpdateHandler.brain[tag].insert(0,feed)
        	except KeyError, e:
        		UpdateHandler.brain[tag] = []
        		UpdateHandler.brain[tag].insert(0,feed)

        #if len(self.cache) > self.cache_size:
        #    self.cache = self.cache[-self.cache_size:]

    @tornado.web.asynchronous
    def send_updates(self, feed):
        for tag in feed["parsed_tags"]:
        	try:
        		for waiter in self.listenners[tag]:
        			try:
        				waiter.write_message(feed)
        			except:
        				logging.error("Error sending message", exc_info=True)
        	except Exception, e:
        		pass
        	

    def on_message(self, message):
        #logging.info("got message %r", message)
        parsed = tornado.escape.json_decode(message)
        feed = {
            "id": str(uuid.uuid4()),
            "body": parsed["body"],
            "tag": parsed["tag"],
            "parsed_tags": self.backend.tag_process(parsed["tag"]),
            }
        feed["html"] = self.render_string("message.html", message=feed)
        UpdateHandler.update_cache(self, feed)
        UpdateHandler.send_updates(self, feed)